[lt1z]

Ive got an RPM Level 6 70E alive after 4 years of 650whp. Lots of variables though I agree above 600 or so I would tend to chose an 80E.

 

[lt1z]

I've had an overall great experience with RPM transmissions over the years. Some of them have been out there for years with racing abuse in all types of late model GM cars/trucks. I did have to return a built T56 once to fix some issues but they took care of it. There are variables of course like tuning for one that can have a large effect on the life of a trans.

My opinion of the company is based upon a sample size of around 40-50 or so transmissions over the years. Bad reviews with a sample size of 1 should be taken with a grain of salt. Overseas orders can be a pain but there is not a single trans builder for late model GM autos I would trust more if I was in that position.

If I was building a TBSS AWD that I expected to run 11s or better I would go with the Level 6 4L70 or a 4L80 conversion. I don't sell their Transmission services online, but do use them locally in a situation where a failure could potentially cost me labor so it is in my best interest to use what I feel is the best product.

 

[lt1z]

When the tuning instructions from the vendor are: Put it back to stock. Done. And yet, the parts that fail (in this case the 3/4 clutches) were not supposed to fail (like a stock output shaft), one really has to consider what game the vendor is playing?

Stock may or may not be the right answer. I would agree with that statement if it was a bolt on truck. Depending upon what you have done on the ECM side of the tune that may effect torque reporting and other values the TCM tune uses to determine pressure etc. Lots of people fail to see the big picture of how it is interrelated. RPM (and others) build transmissions and do not tune vehicles. It is up to the person tuning them to dial it in accordingly. So much so that the few companies that do rebuilds on the newer A6 transmissions actually require that you use a tune they supply to have any sort of warranty.


So I don't really care who people like or dislike in the trans building world. What I said above applies to all.


You are convinced the fuck up was their's and not your's in this instance so I understand your stance given that is your belief. On the other side of the coin I have seen so many parts failures due to tune issues that a lot of major companies would be out of business if they replaced everything someone on the end user side screwed up.