6T40 delayed engagements after overhaul
The problem lies in the compensator piston that a generation two clutch housing uses compared to the generation one housing.
GM 6T70/75 slips and delays in first
A 2015 Chevrolet Equinox equipped with the 3.6-liter engine and 6T75 transmission has complaints of a delayed engagement into drive and slips in first gear.
How to fix GM 6T70/Ford 6F50 rattling noise with transmission in gear
A rattling noise is coming from the transmission whenever the engine is running and the transmission is in gear.
GM 8L90 #7 Check-ball: The overheat that saved the day
Beginning in October of 2015, GM removed the #7 Check-ball from the solenoid valve control body in the 8L90 transmission (see Figure 1). This was done in conjunction with the elimination of the Lube Override Enable Valve from the upper valve body as shown in Figure 2. When this took place, the Lube Override Enable
Shift Pointers: Nissan’s no throttle response
Nissan vehicles using continuously variable transmissions (CVTs) are notorious for defaulting to a no throttle response when the vehicle is engaged into gear. There are several malfunctions that can cause this protective failsafe feature to be initiated. A brake switch (stop lamp switch) stuck on, a double-footed driver, blown or incorrect brake bulbs, and wheel
ZF 6HP26: A torque calculation error
A 2008 Lincoln Navigator with a ZF 6HP26 transmission arrives at Holcomb’s Transmissions in limp. When checked for codes, a P1719 comes up for “Inaccurate Engine Torque Signal.” The TCM receives this over the CAN, causing it to initiate failsafe. The information Ford provides for this code is vague. The Action step provided is to
Shift Pointers: Shift rod displacement in a luxury car
When owning a luxury vehicle, one cannot be faint-hearted when the time comes to pay a repair bill. Even if you bought a used luxury car at a very good price, this doesn’t change the price of new components required to make that repair. Such was the case with Kevin at Sampson Transmission. It began
Shift pointers: Tricky sensor situations
Sometimes you’re the windshield and sometimes you’re the bug—a phrase many of us have heard and experienced. It’s inevitable. The idea is to be the windshield as much as possible. Shane from Cottman Transmissions had a helluva day but in the end, he was the windshield. In his shop he had a 2016 Explorer using
Mercedes-Benz 722.9 no forward movement after overhaul
The complaint A 2007 Mercedes-Benz CLS550 with the 722.9 transmission has an after-overhaul complaint of no forward movement. The cause The B2 Brake Housing inner apply piston was installed upside down—refer to the image above, left. The correction The B2 Brake inner apply piston was re-installed in the correct position, after which forward movement returned,
Land Rover LR3 ZF6HP26 no start after overhaul
The complaint A 2006 Land Rover LR3 equipped with the ZF6HP26 transmission has a post-overhaul complaint of a no-start condition. Part of the transmission overhaul process included the replacement of the mechatronic unit. The cause The mechatronic unit that was purchased from a parts distributor and installed was for a Ford 6R60 transmission (figure 7)
Infiniti G37 RE7R01A chassis codes set
The complaint A 2013 Infiniti G37 equipped with the RE7R01A transmission and the EXT13C transfer case has a complaint of trouble codes C1204 “4WD Solenoid Malfunction” and C1105 “Right Rear Wheel Speed Sensor Fault” stored. Due to extensive damage, the transfer case was replaced, which did not eliminate the stored codes. The shop then replaced
Honda Accord BB7A six-speed: P2720 code set after collision
The complaint A 2015 Honda Accord with a 3.5-liter engine and the BB7A six-speed transmission (seen in figure 1, above), was involved in a minor collision to the left front of the vehicle. The vehicle was drivable and was taken to the transmission shop. Vehicle diagnostics revealed a P2720 “Pressure Control Solenoid D Voltage Low”
