Diagnosing Solenoid Performance Faults in A761, AB60 & A960 6-Speed Units
The Toyota/Lexus A761, AB60 and A960 6-speed transmissions have been showing up in shops more frequently over the last couple of years. Warranties are expiring and people seem to be hanging on to their vehicles longer these days. Even so, there are a number of different issues with these transmissions, including torque-converter clutch failure that is especially chronic with AB60 Tundra applications. Common to all these units is a problem that sticks out a bit more than the others, though: on-off solenoid mechanical fault codes. You’ll see these as P0751 S1 solenoid performance, P0756 S2 solenoid performance, P0761 S3 solenoid performance and P0766 S4 solenoid performance codes.
Vacuum Testing Ford 6F35
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
Vacuum Testing: Ford 6F50, 6F55
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
Vacuum Testing GM 6T70, 6T75
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
Vacuum Testing 6T40, 6T45, 6T50
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
Adapt & Overcome
The TCM is responsible for monitoring and controlling transmission operation through the use of various sensors, solenoids, relays, switches, etc. Computer management provides benefits such as precise shift timing, fault detection and increased fuel economy. But a more remarkable feature is the TCM’s ability to compensate for changes in engine performance, vehicle load, driving patterns and physical wear inside the transmission by adapting its control tactics.
Vacuum Testing Aisin AW TF-60SN, BMW 6F21WA & VW/Audi 09G, 09K, 09M
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
Chasing Bearing Noise in the JF011E CVT
Bearing noises can be difficult to track down even in familiar transmissions which we work on daily. The advantage of the familiar is that we know how to take these units apart and have a general idea of power flow and overall operation–plus, we typically have plenty of extra pieces on the shelf should we need them. Bearing noises in the CVT transmission are much harder to deal with, because we’re not as familiar with it as the units rolling in the door on a daily basis and spare CVT pieces are pretty much non-existent. This has created some minor paranoia when it comes to taking on a CVT repair. Hopefully this article will dispel a bit of the apprehension regarding these units and prove that–with the right tools and a little know-how–CVTs can be repaired and become decent money makers for a shop.
The Art of the Silver Bullet
Folklore has it that bullets cast from silver are the most effective means of dispatching werewolves, witches and vampires. Ever have one of those dreams where you conquer the bad guy and save the world? While this is possible in the fantasy realm, silver bullets don’t always provide heroic results in the real world, where many problems need to be solved with brains, not blind luck.
Vacuum Testing A760E/F/H, A761E
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies. © 2014 Sonnax Industries
Vacuum Testing A750E/F
Vacuum Testing A750E/F
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
GM Compensator-Feed System
There are a growing number of transmissions on the road that incorporate a hydraulic control feature many technicians are unfamiliar with, though they may have noticed the involved components during many builds. Variations of this system can be found in GM and ZF six-speeds, many Aisin AW units and some Ford models. If you haven’t already, it’s an easy bet you will encounter malfunctions related to it sooner or later.
