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Reverse shudder when hot.
Okay got a 96 f-250 7.3 with 191k on it (e4od rebuilt about 4 years ago). The transmission never has slipped and the torque converter works fine. It stays locked at the right times and unlocks perfectly. The transmission shifts thru all gears fine and never slips.
I added a bigger cooler (trucool) and now my transmission never goes above 140degrees. But now I have a strange problem. When the transmission is warm (130-140degrees) and I come to a stop and put the transmission into reverse and give it some throttle there is a very noticeable shudder for about 3 seconds then its goes away. If I stop then keep it in reverse and take off again it dosent happen. Only happens when I shift from drive into reverse. Shifting into drive and giving throttle is fine, no shudder at all.
I did have a problem last year with the stock cooler and having the transmission getting to 160-180degrees and not engaging in forward gears but keeping reverse. I have seen alot of people with that problem of losing forward gears and keeping reverse, but never regaining them like I have... About 5 times.
So yah quick summary...
-When warm (140degress) shifting into reverse gives a shudder for a few seconds.
-Forward is perfect, and shifts perfect.
-Last year I lost forward gears about 5 times when it got around 160-180, kept reverse. But I regained my gears when the tranny cooled down.