The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. Others install them wet. Analytical cookies are used to understand how visitors interact with the website. A lone sealing ring (PN 87054-S96) goes in the top groove. Use plenty of lubrication as a pre-lube and for adhesion. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Before mating them, make sure all contact surfaces are clean. In other words, are the two pump halves securely tightened? Roller clutches should always be replaced; consider it good life insurance. Most obvious is the solenoids, which control shift function and converter lockup. 1996-2004 Mustang 4.6L 2V 4R70W Transmission Gear Ratios. Its possible it could be something in the valve body but not if it wasnt touched. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. Archive - 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. Gears Magazine Check the uid level and line pressure. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. Was pulling my trailer the other day unloaded without any problems. The forward sun gear drive shell rides against the number-5 needle bearing. Diagnose the problem (accurately diagnose). And that is why you should know what it can and what it cant do. The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. If the uid and filter are clean, the pump and pressure relief are the next order of business. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. When you build, use new Torringtons if possible. Members 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. Fault codes wont always appear, especially if you dont have a Check Engine indication. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). PS. Email: [emailprotected] Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. Harsh engagement in any of the forward ranges creates too much line pressure. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. It could also be a misfire. And this has prompted the fabrication of much better transmissions over the years. It can pop out if it is not completely seated. Online Buyer's Guide It has three alignment holes (slots). Make sure that if your output shaft seal has a lip spring it doesnt pop out. 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. If you dont have a press, just about any machine shop has one. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. The detent cam and roller hold the manual shift control in a given position. Recently, I did some research at my friend Rodgers shop in Miami, FL. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. There it was a misfire. If you place the selector into gear and there is no engagement in any gear, the first thing you need to do is check the uid level. WebThe 4R70W/4R75W transmission is susceptible to issues that include: loss of forward gears, intermediate clutch failure, loss of second gear, delayed reverse or shudder in reverse, 1. I have measured the plate bowing upwards as WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic Bingo! Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. I shifted down into 1st and it won't move, feels like it's in neutral. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. 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. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. 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. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. As mentioned earlier, no stock transmission is perfect in every aspect. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. Transmission Control Module: Buyers Guide for Classic Cars. Of course, like every transmission out there, they have their common concerns. Other issues can be a faulty direct clutch or direct clutch piston/seals. If the spring is missing and cannot be found, replace the seal. According to Ford, at the 3-4 shift valve, SS1 pressure (the SS1 is on) isnt enough to overcome spring pressure, keeping the valve in. Make sure the old filter seal has been removed, which is an easy item to overlook. What gives? Overloading the 4R70W transmission is a bad idea. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). It could be EPC or MAF sensor failure to a leak to the 3rd clutch. Note the proper installation and how the rollers are located (arrows). We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. This is the natural color version (.085 to .089 inch). Of course, like every transmission out there, they have their common concerns. The plates should have been resurfaced or replaced. Once you have established the intermediate clutch clearances, which are 1.634 to 1.636 inches from the pump mating surfaces to the pressure plate, install the front pump gasket. Re: 4R70W tcc lock up in 1st gear. This allows for proper seating and prevents warping. The MCCC engages and disengages the torque converter clutch. This cookie is set by GDPR Cookie Consent plugin. Accelerating those 20 mph in 1st gear instead of 2nd gear would get me faster time, but for that, I need to stop the slip by engaging the TCC. Install the clutch discs and plates once the hub and thrust bearing are installed. Most factory AOD Mustangs shift into second gear at a full-throttle RPM of 4,900 (+/- 200 rpm) and roughly 4,500 rpm from second to third. All that is needed now are clutch discs between the clutch plates. The shift solenoids open the shift valves when they receive power. The low-reverse band is applied, which holds the planet carrier. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. Generously lubricate the seal lip with assembly lube. But when we checked the coolant for exhaust gases, there wasnt any. If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. Subscribe Now First gear, the solenoid A and the pressure control solenoid PCS involved. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. Lubricate the bolt threads and check the bolt travel. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. The pressure regulator valve bore in the valve body was worn out. There are other reasons for low line pressure as well, such as damage to the number-6 shuttle ball, 1-2 accumulator seals, manual shift valve, main pressure regulator valve, and number-1 and number-2 seal. The intermediate clutch is applied without being a part of power transfer. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. Slowly walk the tool around, protecting the seal lip. The AODE/4R70W rotating mass is similar to that of the AOD. The forward clutch continues to be applied by pressure through the 3-4 shift valve. It does what the governor did hydraulically. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. It does not store any personal data. Install the low-reverse servo cover and snap ring. At WOT, you want high line pressure for firm clutch and band engagement. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 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. If you dont have access to fresh clutch plates, inspect and resurface existing plates. Staggering these gaps helps contain line pressure at the source. The reverse clutch discs alternate with plates. The forward and reverse clutch assembly installs in the main case. AODE/4R70W hydraulic management comes from a new, thicker valve body for added strength, along with the use of three electronic solenoids that control shift and torque converter function. It cant be a servo, they are only used for overdrive, reverse, and manual first on this trans. In third gear in overdrive range, the SS1 is off and the SS2 is on. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). 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 Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. For a firmer 2-3 upshift be something in the 1990s 's Guide it has alignment. 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