Any tranny guys have any thoughts on these??? how much better are they??? Jim Pace catalog says they an replace a 4L60 app. Any truth to this???

 

A 4L65E is basically a heavier-duty version of a 4L60E. They are a direct replacement (bolt-in type thing) for a 4L60E if that's what you're asking?

I read a really good article about them a while back, and they've got a lot of beefed up parts inside that are in place of the common failured parts in 4L60E's. The input shaft is stronger, bands and clutches are stronger / more "heavy duty", the planetary uses 5 gears instead of 4, etc . I think the 4L65E may be the answer if you need a replacement for a 4L60E that's been had by a 400 + HP engine!