Toyota/Lexus U660E, U660F: Critical Wear Areas and Vacuum Test Locations
OE valves are shown in a rest position and should be tested in a rest position unless otherwise indicated. Test locations are pointed to with an arrow. Springs are not shown for visual clarity. A low vacuum reading indicates wear. What should my vacuum test results be? While a properly calibrated and maintained test stand
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 World’s First FWD 8-Speed Transmission
In this February Tech Talk article, Wayne Colonna breaks down the AWF8F35, developed by the Aisin Group.
Kia Borrego: A5SR2 Transmission
This A5SR2 came into the shop in 4th gear failsafe. The codes pulled were P0732, P0733 and P0734 gear ratio codes along with a P0763 Direct Clutch (D/C) solenoid performance code.
January 2020 Issue
In this Issue:
VW Touareg: Shift Interlock & Stop Lamps Inoperative
Kia Borrego: A5SR2 Transmission
Kia Borrego: A5SR2 TCM Upgrade
December 2019 Issue
Honda 4- and 5-speed Transmission: Whines in Neutral
Honda CRV 5-speed: P0983 Open Solenoid D Circuit
Acura MDX BYFA 5-speed Transmission: P1744 Shift Valve E Stuck On
November 2019 Issue
In This Issue
Mazda 6 – AW6A-EL: Stuck in High Gear Failsafe
Mercedes Benz M Class: Transmission in Limp Mode
GM 8L90: Elimination of the #7 Checkball
October 2019 Issue
In This Issue
Volkswagen/Audi 09G: Flared Shifts
722.6, 722.9, NAG1: B2 Clutch Assembly
Nissan Frontier RE5R05A: No Start
September 2019 Issue
In This Issue:
Ford 6F35: Low-Reverse/1-2-3-4 Improved Clutch Housing
Ford 5R110W: Redesigned Sun Gear Shell
Ford 6R60 and 6R80 Transmissions: TCC Slip Code
GM 4L60 E Series: Intermittent Hard Shifts
4L60E Transmission: Late 2-3 Shift
4L60E: TCC Stuck-On Sensation
August 2019 Issue
In This Issue:
GM 8L45/90: Delayed Engagement After Prolonged Inactivity
GM 8L90: Gear Whine in Fourth and Fifth Gears
GM 8L90: Whistling Noise
GM Body Control Module: Ground Loss Module Damage
July 2019 Issue
In This Issue
Chevrolet Aveo: Harsh Engagements and No Overdrive
Land Rover: Erratic Shifting
Mazda Active Adaptive Shift: No Higher Range Upshift at Heavy Throttle
