TCI Competition series TH350 Problems!

HotRodGMC68 · 03-01-2010, 07:52 PM

I posted on here a while back about my tranny being stuck in high gear and having no clue why. I had the tranny torn down, inspected, and rebuilt.

Turned out that the direct clutch pack was burnt up along with the band. Also, the seals in the direct drum were shrunkin (from the insane heat that was in the tranny when the previous owner hot lapped it 5 times in a street race!) and was letting fluid blow by.

After installing and filling the fresh tranny yesterday, I ran it through the gears.. had Reverse, Neutral, high, and 2nd. But in first gear the rear tires would lock up as if it was holding two gears at once!

We're thinking that a crack inside the case or a porus area in a fluid passage could be the problem at this point but we've been wrong before!

This transmission does NOT have a trans brake. Does have a full manual, FWD pattern valve body. Has not been modified in any other ways than what TCI does when they build them.

I would greatly appreciate it if anyone could help out with this new situation.

Thanks a bunch!
Kurt S.

03-01-2010, 07:52 PM	#1
HotRodGMC68 Junior Member Join Date: Oct 2009 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	TCI Competition series TH350 Problems! I posted on here a while back about my tranny being stuck in high gear and having no clue why. I had the tranny torn down, inspected, and rebuilt. Turned out that the direct clutch pack was burnt up along with the band. Also, the seals in the direct drum were shrunkin (from the insane heat that was in the tranny when the previous owner hot lapped it 5 times in a street race!) and was letting fluid blow by. After installing and filling the fresh tranny yesterday, I ran it through the gears.. had Reverse, Neutral, high, and 2nd. But in first gear the rear tires would lock up as if it was holding two gears at once! We're thinking that a crack inside the case or a porus area in a fluid passage could be the problem at this point but we've been wrong before! This transmission does NOT have a trans brake. Does have a full manual, FWD pattern valve body. Has not been modified in any other ways than what TCI does when they build them. I would greatly appreciate it if anyone could help out with this new situation. Thanks a bunch! Kurt S.