Solenoid Differences: Ford 6F35 Gen 1 vs. 2
Looking back on the history of the Ford 6T40, the cousin to the 6F35, we recall a second generation of this transmission coming out in 2012. There were many control-valve changes to this valve body as the pressure switches were eliminated and the top cover of the valve body had damper and spring assemblies added to it to provide miniature shock absorbers to each of the solenoid output circuits.
Don’t Blow It
The JF506E in VW, Land Rover and Jaguar applications experiences a condition of no upshift out of first gear when cold due to mechanical malfunctions of the 2/4-brake timing and duty solenoids (Figure 1). And there are times when this transmission may also experience a no-reverse condition due to a mechanical malfunction of the low-clutch timing solenoid (Figure 2). This information has been in our past seminars as well as in our bulletins, and since the cold season is upon us it’s good to keep this in mind.
Understanding the 5R55S/W Initial Engagements
The 5R55S/W transmission has been with us for a little more than a decade. Its common complaints include harsh forward engagement; harsh reverse engagement; delayed, harsh initial engagements; flares on the 3-4 shift; and bind-up on shifts.
Rescue Ranger
Many times after an initial scan of the computer system, you find an electrically related solenoid code. If you’re lucky, a new solenoid fixes it, or maybe there’s a problem with the internal wiring – not so bad to fix these problems.
But then there are the times that these items do not take care of the problem. That usually means these days that an external wiring problem is causing that solenoid code.
Honda & Acura – the New Generation
This has now become a very frequent question on the tech line: “Hey, what are all these solenoids, and what in the world do they do?” The questions started in the 1997 model year, when the Honda Prelude came out with the M6HA transaxle. This was one of the first vehicles to receive this new-generation 4-speed. This article, I hope, will clear up some of the questions on shift strategy, clutch-pack applications and solenoid application. After all, how can you fix something if you don’t know how it works?
