[73LeMans]

I'll start by saying, I've done nothing to diagnosis this TH400 and I don't expect to diagnose it here without a lot more information and actually diving into it. Its still in the car exactly how I left it after Octobers track outing. Haven't even dropped the pan to see whats up. I'll likely bring it to a pro shop as Ive done for all other transmission needs, but curious if it can determined where the focus should be...and then maybe I try it myself.


TH400
10"Continental converter
3800 stall
Fully Manual Reverse Valvebody w/Tbrake
TCI Max Shift trans fluid
3775lbs race weight
I'll get crap for this I'm sure....Burnouts are and have been for 25 years, 1st into 2nd, and usually (but not always) 3rd and roll out.

For the last 3 passes, while under full throttle, there was no 2nd gear for runs 1 and 3. Its as if I had shifted into neutral. The engine hit the rev limiter set by the MSD so I shift into 3rd. For the 2nd run in between, everything was fine.

- 2nd gear worked consistently during all 3 4500 rpm burnouts without issue
- 2nd gear always works normally driving down return road and parking lot
- Fluid doesn't smell burnt and its full, checked hot, running and in gear
- TCI 34 element sprag is 25+ years old by now. Trans has been refreshed one time since, in 2010

If its the sprag, which a lot of indicators point to, why would the run in middle be OK? And if it is the sprag, doesn't it just break and then become a consistent problem?



video of car hitting rev limiter because, why not

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https://www.youtube.com/watch?v=zjgpGic2_LY
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