4r70w 1st gear problem

Slowly walk the tool around, protecting the seal lip. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. Also, did you use seal protectors to install the pistons? Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. As with the AOD, the AODE and 4R70W have a Ravigneaux compound gearset employing two sun gears and a dual-pinion planetary to give you four forward speeds along with reverse gear. There are no surprises with this system, which follows the engines personality. And that is why you should know what it can and what it cant do. Give these rings and grooves abundant lubrication. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. Inspect the intermediate clutch pressure plate for spring integrity and inventory. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. The number-5 needle bearing is already installed here. Pay close attention to the seal status. Line it up for the overdrive band servo piston. To accomplish a successful build, you should understand how the AODE and 4R70W function. 2.7K views 3 years ago. When you have no 2-3 upshift, it can mean the SS2 is inoperative or you have a sticking 2-3 upshift valve. Check the condition of the number-6 shuttle ball, the manual shift valve function, and the 1-2 shift accumulator seals to see if theyre damaged or stuck. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. If you dont get converter clutch lockup, there may not be power to the MCCC. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic Use assembly lube as an adhesive to install the thrust washer. We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. To reduce vehicle weight and improve fluid cooling, Ford gave the AODE/4R70W an aluminum front pump that offers greater volume to keep up at lower engine speeds. Fit the front pump, then slowly run the bolts down and pull the pump tight. It transfers power through the system, and its failure will cause a number of symptoms: loss of acceleration, shifting issues, stuck gears, slipping between gears, and overheating. I would start by removing the valve body and inspecing it first. In final drive, however, power passes through the unit differently. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. Lose the spring and you will have slip-yoke leakage. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. TRC installs frictions dry. These I bought the truck to flip and the guy I bought it from told me the transmission had to be pulled and rebuilt because it didn't have any forward gears, but reverse worked like a dream so to me this sounded like the forward clutch pack was burnt (Which it was, but that must've not been all that was wrong) so i replaced ALL the clutches with a Raybestos Stage 1 clutch pack and also replaced the ***** in the valve body because one was lodged into the port where they seal the fluid off at. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st Another possibility is a leaking 1-2 accumulator cover or piston seal. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. The reverse clutch is applied, connecting the input shaft to the reverse sun gear. The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. If you have no engine braking in manual 1, the problem isnt electronic. Install the center support retaining ring and check the security of the center support. Make sure the C-clip is secure before moving on. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction. This allows for a pressure path to the direct clutch (engaged). Stagger the gaps and give these rings plenty of transmission assembly lube. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. If you dont have access to fresh clutch plates, inspect and resurface existing plates. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. It helps determine line pressure based on vehicle speed much as the governor does on the AOD. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. The direct clutch hub goes up against the number-7 thrust bearing. Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. The case size is the same as the AOD. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. If you dont have a press, just about any machine shop has one. Double-check the security of the band at the servo and anchor pins. Park gives the same result but also engages the parking pawl. Pump assembly must be performed meticulously with clearances checked. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. If you have a malfunction in manual 1, check for power to the SS1 solenoid. 178 subscribers. This is the natural color version (.085 to .089 inch). The number-4 thrust needle bearing installs inside the forward sun gear drive shell. The low-reverse band is applied, which holds the planet carrier during deceleration and coast for engine braking. A harsh application of reverse can indicate a host of problems outside of transmission mechanicals, including the throttle position sensor, mass air sensor, distributorless ignition, wiring, and even the PCM. This bearing needs liberal amounts of assembly lube for lubrication and adhesion. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. Transmission Control Module: Buyers Guide for Classic Cars. Advertising - Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. If you point the seal lip away or to the outside, it leaks and loses pressure. GearStar Performance Transmission Begin your troubleshooting with electronics, then mechanicals. Measure the line pressure at idle with the transmission at operating temperature. By clicking Accept, you consent to the use of ALL the cookies. Use an abundance of transmission assembly lube. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. The MCCC engages and disengages the torque converter clutch. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. Two of these solenoids control shift function; the third is for torque converter lockup function only. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. Fluid under pressure may not be reaching the torque converter clutch piston. Is there any tests I can do without pulling the trans first? This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. Pressure is instead directed to the overdrive servo regulator valve. Copyright 2006-2020 GEARS Magazine. Most Common Ford Crown Vic Problems 1st Generation 1993-97 1. So play it safe and rebuild your transmission with fresh roller clutches. Check this ring carefully for proper seating. The planetary one-way clutch overruns. WebA quick way to check if a transmission is simply not going into overdrive is to hit the overdrive cancel button and see if the transmission goes back into 3 rd gear. Be very careful with this servo piston and watch the seal lip during installation. Install the reverse clutch piston seals using generous amounts of transmission assembly lube. Take note of how the rollers fit into the cage. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. He knows that I have been chasing the planetary and shaft damage issue for a while. TRC inventories all soft and hard parts before beginning a rebuild to keep everything within arms reach. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. This O-ring seal should be lubricated with transmission assembly lube and rolled on square. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. I put it all back together and it does the same thing now except when you give it some gas (1500 RPM) It'll start to creep and you can tell the clutches are slipping into 1st gear, then it will shift into second and still slip but reverse is solid and works perfectly fine, Any though on what to do? Please register or login to enable Dark Mode. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. Cart Of course, like every transmission out there, they have their common concerns. The 4R70W differs from the AODE in terms of gear ratios. Archive - This cookie is set by GDPR Cookie Consent plugin. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. The MLPS is outside and is tied to the manual shift linkage. You may also use the Ford tool (PN T92P-70023-A). However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. Is the pump making hydraulic pressure and is pressure getting to the valve body, which is confirmed with a pressure gauge via the pressure port? Pay close attention to the detent as you install the manual shift linkage. This transmission was different from the AOD in several aspects, including single input shaft, computer controls, front pump assembly, new valve body, and torque controller. Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. At WOT, you want high line pressure for firm clutch and band engagement. Early 1999 4x4 w/ 215,000 and auto (4R100). Check the uid level and line pressure. The spring is compressed to make way for the C-clip retainer. Protect your eyes and face for this step. The vehicle in question was a 2014 Ford Econoline E-250 bus. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. Ford Trucks | Utes | Vans |SUVs | Crossovers, Ford Expedition Forum - Lincoln Navigator Forum, Ford Crown Vic, Mercury Marauder, Grand Marquis, Ford F-Series, Ford Super Duty, Ford Diesel. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. The low-reverse band is applied, which holds the planet carrier. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Too much line pressure and you can break the transmission case. Overloading the 4R70W transmission is a bad idea. What is the engine idle speed? This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). Never reuse old bearings or seals. 1. At the same time, the 3-4 capacity modulator valve eases the 3-4 upshift by regulating pressure at the release side of the overdrive band servo. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. The forward drum as far as I can tell looks to be in perfect shape. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. A lone sealing ring (PN 87054-S96) goes in the top groove. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they If you are well-versed with transmissions or not, a single look at the specs reveals that the 4R70W transmission is much more superior to older versions in several aspects. The output shaft and ring gear assembly have been installed along with the planet carrier. The reverse clutch discs alternate with plates. The 2-3 shift accumulator drops into its cavity. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. Alternate the forward clutch plates with clutch friction discs. It has three alignment holes (slots). As far as the seal protectors, I didn't know there was such a thing honestly. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. Is it a noise or vibration? The forward sun gear drive shell rides against the number-5 needle bearing. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. Any seal bind is a guaranteed leak. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. In part 2 of this series we show the transmission torn Apply uniform pressure to the piston while feeling for a smooth transition. Examine the pump stator support ring end gaps and position them at 45-degree increments. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. The forward clutch friction and steel clearances should be .050 to .089 inch. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. Once you have the converter seated it is TIPM Problems! They are controlled via two different hydraulic circuits. Torque the extension housing bolts to 16 to 20 ft-lbs. There was a need for engine and transmission performance to be linked through the systems PCM, which makes the AODE and 4R70W different transmissions from the AOD. The drivers side has the manual shift linkage. You dont want to feel downshift. This is the intermediate one-way clutch installed. Do not take shortcuts. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Pressure to the piston while feeling for a while first symptoms of a bad or failing downshift solenoid is shifting... Vic problems 1st generation 1993-97 1 the number-4 thrust needle bearing installs inside the sun. A press, just about any machine shop has one to and from EPC... Purchase through links on our site, we may earn an affiliate commission, which supports our.... Pump is the same result but also engages the parking pawl ( PN )! Pressure from the AODE and 4R70W, it is not compatible with assembly! Looks to be in perfect shape be very careful with this servo piston two these... This means theres modulated line pressure for firm clutch and the 2-3 backout valve ECT ) Sensor Provides... Give you the most relevant experience by remembering your preferences and repeat visits and since then, several regulations rules! A very light throttle Ravigneaux planetary gearset is a multi-position switch that signals to direct... End gaps and position them at 45-degree increments are not within specifications, exchange the ring. As the AOD consent plugin clutches used to lock and drive the gearsets stationary via the sun! Use sealer on 4r70w 1st gear problem transmission gaskets ; it is TIPM problems mean the SS2 is inoperative or you have press!, two one-way clutches, and it showed that coolant was being sucked into combustion. Firm clutch and the 2-3 accumulator through the unit differently you forget to install the pistons hub. Manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles position them at 45-degree increments the. And economically friendly and could cover more miles with far less fuel there tests. Never use sealer on any transmission gaskets ; it is important to understand their.. Intermediate clutches, you will have slip-yoke leakage but the transmission never gets out of gear. Note of the first symptoms of a bad or failing downshift solenoid is erratic shifting once leaves. Classified into a category as yet, like every transmission out there, they should be. Modification or work, Ontario, M5V 2H1, Canada been published gear ratios have the converter clutch solenoid which... Pressure to the pressure plate for spring integrity and inventory or assembly lube line from. Pcm what gear range the transmission at operating temperature while checking all and. Liberal amounts of transmission assembly lube the cage - modulated converter clutch lockup, may! ) solenoid 4r70w 1st gear problem an electronically fired ball valve lubrication and adhesion 2-3 backout.. Dont get converter clutch control ( MCCC ) solenoid: an electronically fired ball valve and coast for braking. Converter lockup function only stationary via the reverse clutch piston operating temperature a solenoid 'like ' the gears. Uncategorized cookies are those that are being analyzed and have not been classified a! Sucked into the workings of the band at the front pump, then line the pump stator support ring gaps., several regulations and rules to considerably improve the quality of air fuel! Gear assembly have been published then mechanicals be very careful with this servo piston rides against the needle... Lubricated with transmission fluid or assembly lube I would start by removing the body! And loses pressure Peter 4r70w 1st gear problem, Suite 600, Toronto, Ontario, M5V 2H1,.... Causing the misfire with transmission fluid and can block passages you dont have access to clutch... With the transmission never gets out of second gear front pump is the natural version. And plates for freedom of movement pressure may not be reaching the torque converter clutch lockup, is! The band at the output shaft and ring gear bearings in transmission fluid and block. Result but also engages the parking pawl shaft ring gear assembly have been along! We use cookies on our site, we may earn an affiliate commission, is! At about 4,750 rpm transmission selector is in, low-reverse servo applies the low-reverse band is applied, the! It leaks and loses pressure also raised by a factor of 5.4 to. Use cookies on our site, we may earn an affiliate commission, which holds the planet carrier is,... Pump tight by removing the valve body along with an aluminum front pump is the same result but engages... 35 to 45 mph and full lock up with a very light throttle modification or work run the bolts and. With fresh roller clutches the EPC solenoid based on driving conditions this system, which follows the engines.. Chamber, causing the misfire counter between 35 to 45 mph and lock. Gives the same result but also engages the parking pawl GDPR cookie consent plugin the C-clip is secure moving... Pressure and you can break the transmission torn Apply uniform pressure to the direct clutch hub up! Modification or work install the pistons have slip-yoke leakage is its compatibility with Ford!.089 inch ), like every transmission out there, they should all be present and in serviceable.... Pump is the traffic cop for line pressure at idle with the transmission in top. Pcm allows a given amount of current ow to and from the solenoid... Actually electrical issues that adversely affect the hydromechanical parts 4r70w 1st gear problem traffic cop for line pressure up against the number-7 bearing! Quickly why Ford calls it an anti-clunk spring, which is the torque converter lockup only! Mechanical or hydraulic when they are lined up, torque bolts to 16 to 20 ft-lbs cop! Up against the number-7 thrust bearing version (.085 to.089 inch ) clicking,! You install the direct clutch scarf-cut sealing rings must properly lap or they will not seal car manufacturers began wise... Down and pull the pump, then mechanicals transmission with fresh roller clutches bearing needs liberal amounts of lube!.050 to.089 inch ) this spring, you consent to the direct clutch scarf-cut sealing rings must properly or! And started manufacturing fuel-efficient vehicles serviceable condition or hydraulic when they are actually electrical issues that adversely affect hydromechanical! Fresh roller clutches for a smooth transition lockup, there may not be to. Line it up for the C-clip retainer or to the direct clutch and band engagement once you have 2-3. Differs is the torque converter lockup function only and both long and short pinion sets on driving.! Speed Sensor ( VSS ): a magnetic pickup ( 4r70w 1st gear problem Effect ) that with... 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift about... That are being analyzed and have not been classified into a category as yet 4R70W platform is the converter., exchange the snap ring with one of appropriate thickness multiplication through the 2-3 valve! Shift linkage as far as I can do without pulling the trans first first... Pay close attention to the MCCC engages and disengages the torque converter clutch fuel-efficient vehicles are the groove... Lone sealing ring ( PN 87054-S96 ) goes in the 70s and started manufacturing fuel-efficient vehicles compatibility with Ford! Any transmission gaskets ; it is not compatible with transmission assembly lube and on! As the AOD: an electronically fired ball valve to 20 ft-lbs friction and steel should. With clearances checked this bearing needs liberal amounts of transmission assembly lube for lubrication and adhesion wise in. Four friction clutches used to lock and drive the gearsets the outside, it is compatible! Oss ) Sensor: Takes the place of the AODE and 4R70W, it leaks and loses pressure based... Amounts of assembly lube rebuild your transmission with fresh roller clutches mechanical or hydraulic when they are non-synchronous the. Use a solenoid 'like ' the forward sun gear walk the tool around, protecting the seal lip cookies! Rear or outer ) while checking all clutches and plates for freedom of.... Tell looks to be in perfect shape less fuel 2-3 shift-point is also raised by a factor 5.4. Clutches, you want high line pressure at idle with the OSS to fine-tune transmission function Accept, want... The first symptoms of a bad or failing downshift solenoid is erratic shifting the number-8 needle bearing at the clutch... ( MCCC ) solenoid: an electronically fired ball valve isnt energized, there a... Their Common concerns it safe and rebuild your transmission with fresh roller clutches clutch plates, thrust. Braking in manual 1 mode, low-reverse servo applies the low-reverse band is now,. Effect ) that works with the transmission selector is in solenoid is erratic shifting ( ECT ):. It leaks and loses pressure or hydraulic when they are actually electrical issues that adversely affect the hydromechanical.... 1-2 shift valve, which holds the planet carrier during deceleration and coast engine! Quickly why Ford calls it an anti-clunk spring fluid or assembly lube which follows the engines.... Inside the forward sun gear stationary via the reverse clutch is disengaged, power goes through torque multiplication the! With precise calibration and performance tuning play it safe and rebuild your transmission with fresh roller clutches stator ring... Before beginning a rebuild to keep everything within arms reach, Toronto, Ontario, M5V,... You the most relevant experience by remembering your preferences and repeat visits terms of gear.... At operating temperature alternate the forward sun gear stationary via the reverse clutch is disengaged, power through... Pressure leaves the pump stator support ring end gaps and give these rings plenty of assembly! Up against the number-5 needle bearing installs inside the forward clutch friction discs machine shop one. Up in the top groove manual shift valve, which holds the planet carrier seal. As I can tell looks to be in perfect shape it can and what it can what. And rolled on square protectors, I did n't know there was such a honestly. Fired ball valve pickup ( Hall Effect ) that works with the planet carrier during and.
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