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Thanks Rusty. We have Joe's 1545 apart and just got the master rebuild kit. We will have the OEM aluminum piston in a day or two. I called Joe and explained. Since we have new OEM steels, frictions, seals and piston, I gave him the option of being the first or just continuing to have new...

Good news. Between Rusty, Matt and Transmissioncenter, I think we have found an improvement to the fourth/reverse clutch pack problem on our Allison 1545 (or 545). Many parts are the same with the GM 4L80E. In the 4L80E this clutch pack is the "direct" clutch pack. Thus a performance set...

Okay Rustystud, talked to Matt that is rebuilding the 1545 and the entire fourth clutch pack may be substituted, he thinks. He has mentioned several times before that there is a steel piston with vulcanized rubber seal that is superior to the aluminum piston. He said when the new style is...

Really Rusty, hope you are feeling better. You brought up a couple of things that I would like to follow up on about the clutch pack and torque converter interchange with the Chevy tranny. I'm wondering about pump sections too. Since the 4th and rev pack goes out most, that would seem to...

I'm going to post this on a couple of old threads that are likely to get hits when researching the Allison 1545 that is in our M35A3's. They are prone to having the fourth/reverse clutch pack go out, probably at least in part to the locking torque converter but also inferior OEM seals on that...