4l60e binding reverse
The band clearance was probably way out of specifications before you even tore into this thing, but now, with all the changes, you are seeing the results.
Measure the servo pin clearance, if possible (I know it can be hard on an F-body). It's totally possible to make a "worn" band/ drum assembly work if you just tighten the clearance by either using the long Sonnax pin (and grinding it to fit) or welding the tip of the servo pin, and grinding it to fit.
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Last edited by Mbs1994; Dec 30, 2023 at 11:10 AM.
The DRING rubber are ok not my fav I prefer teflon but I do suggest using a 400 or 4L80E return spring in place of stock with the DRINGS as I have noticed tearing down units with DRINGS many times the servo is pretty much applied still keeping band in contact with drum, Probably beause that spring is the release of the band on the 2-1 and the drings tend to be rather tight in the bore, As I said I always use the teflon myself except when I use the sonnax 2nd servo and even then i have some teflons I cut and replace the outer DRINGS with just my preference.
By the way the Sonnax pin will not fit right out of the package, you will have to grind it to the proper length. So, you will have to check the pin travel.
By the way the Sonnax pin will not fit right out of the package, you will have to grind it to the proper length. So, you will have to check the pin travel.
In short I would not drive till I had found and solved the issue.











