Ford 4R75E Slipping in Third Gear
Complaint: The vehicle may come into the shop slipping in third gear, upon disassembly of the transmission the direct clutch is found to be badly burnt. Further disassembly reveals the bottom of the 2-3 accumulator piston has blown out, refer to figure 5. Cause: The damage to the 2-3 accumulator piston will allow forward clutch
Chrysler/Dodge/Jeep 4XRE Transmissions No Movement
Complaint: A vehicle equipped with a 4XRE Series Transmission stopped moving suddenly soon after overhaul. Since an unmodified 4XRE valve body does not charge the torque converter in Park, the fluid level was check in the Neutral position, it was over full. The technician then removed the return cooler line to check for cooler flow
Ford Focus 4F27E Harsh Garage Shifts
Complaint: A 2006 Ford Focus with the 4F27E Transmission has complaints of harsh garage shifts as well as harsh lift throttle coast downshifts. All upshifts are perfect and no trouble codes are stored. An exchange valve body complete with solenoids did not eliminate the complaints. The Mass Airflow Sensor was cleaned and checked and the
Another 62TE ‘No-Move’ Possibility
Most seasoned techs have several quick diagnostic steps they take when faced with a transmission malfunction. The type of problem and transmission determines which steps to take. For example, a “no-move” condition. If it is a fresh install, the most obvious diagnostic step is to know how much fluid it took. If it only sucked
Persistent P2757 DTC
When the vehicle was scanned, a P2757 code was pulled which is a solenoid performance code for the SLU (TCC) solenoid.
An RE7R01B Dilemma
Harold Grisham from Grisham Transmission Center had quite a dilemma on his hands. A 2016 Nissan Titan comes to his shop with a sudden no reverse with 60K on the odometer. This vehicle has the RE7R01B transmission in it and this is where the dilemma begins. After a basic inspection, it revealed the ATF level
It’s the Little Things That Matter
Whenever a transmission fails to work correctly after a rebuild, a small error like cross-connecting speed sensors can cause a major headache. It does not take much to correct this error if you know it occurred, but when you do not, a small error turns into a giant monster. Without a doubt, when it comes
Allison 1000/2000 P2 Planetary Carrier Changes
In this edition of Transmission Tech/Talk, Wayne Colonna describes a new design for the Allison 1000/2000 P2 sun gear thrust bearing.
GM 4L65E: The Purpose of Omitting the #5 Ball
Wayne Colonna describes a 4L65E with a modified valve body spacer plate where the #5 checkball was left out.
The Problematic CVT 7
Wayne Colonna breaks down the problematic nature of the CVT 7.
The World’s First FWD 8-Speed Transmission
In this February Tech Talk article, Wayne Colonna breaks down the AWF8F35, developed by the Aisin Group.
Slamming reverse in MAXA
In this Shift Pointers, Wayne Colonna tells the story of a MAXA transmission slamming into reverse in a Honda Accord.
