cdhd2001 said:
Have you tried an electric cooling fan on the original cooler?
Yes I have. Didn't do diddly for stop n go heat build up. I put a Setrab Model 640 Oil cooler in place of the OEM and all 220+ temp days went away. Most I ever see now is 180. The Setrab is a stacked plate and holds at least 4 times the fluid of the OEM. It is around 13 x 11 x 2. I had some Jiffy Tite to AN-10 adapters made by Jiffy Tite (great folks) to use the factory quick connects. I had to make new mounting brakets and other stuff. I did also talk to Allison's engineering department and asked the head field engineer about what he thought. He admitted they had an issue and said my mod should work to reduce overall temps, but it wasn't really required with the 220 temps I was seeing. It was still too high for me. Mods that showed up with the 04 LLY Ally combo were what he told me would solve the problem for the future. They included a new solenoid, wiring harness, control software which resulted in higher fluid flow at idle. I couldn't retro the new tranny in my truck because the controls for the new solenoid weren't coming out till the LLY change.
Too bad MikeL. didn't do this sooner. It would have saved me 2 fans, plus temp controllers, plus all kinds of hoses and fittings, temperature monitors, all kinds of Transynd going down the drain, etc. That's all money that could have gone into something else.
At least 3 others people have done the same mod, all with similar success.
Chris