Originally Posted by Joes69
Originally Posted by OneBadGMC
Originally Posted by mwcoc
I BOUGHT THIS TRANSMISION FROM HARRY TILLMANS IN ASTON PA, WENT AROUND THE BLOCK 1 TIME WITH THIS TRANSMISION , WHEN I TOOK IT TO THE TRACK , I SHIFTED FROM FIRST TO SECOND IN THE BURNOUT THE TRANSMISION EXPLODED, THIS WAS STREET CAR THAT THIS TRANS WAS IN , WHEN IN ALL REALITY THIS WAS TRANS WAS BUILT FOR A HIGH HORSEPOWER CAR , WHICH COST $1375.00 , REASON FOR EXPLOSION: WE TOOK THE TRANS TO 2 OTHER TRANSMISSION SHOPS TO FIND OUT WHAT HAPPENED AND THEY TOLD US THAT THE HIGH GEAR DRUM HAD A CRACK IN IT IN WHICH THE BUILDER DID NOT SEE. THIS TRANS BENT THE DRIVESHAFT IN A U SHAPE , TOOK THE FLOOR OUT , AND TOOK A CORNER OF THE ENGINE BLOCK OFF. WHEN WE WENT HARRY HE WOULDNT DO NOTHING FOR ME. THANKS HARRY TILLMAN SPEED SHOP OF ASTON PA. [/code][/url]
ok I have a question.I have run th400s 3 pseeds for 20 years and always started in 1st and went to third gear before rolling out of the box.Is this wrong to do.I have never broken a trans or even a hint of problems.Not questioning or saying anyone is wrong this is just info I would like to know.Should you start in second if its a manual valvebody and if its not you will have to start in first..Please clarify...thanks
Well, if you knew anything about transmissions, you'd know to NEVER do a burnout in 1st gear with a 3-speed transmission.
When the 1-2 shift occurs in a non-loaded condition, such as a burnout, the low roller sprag can over speed and fail, causing a catastrophic failure like the one you encountered.
The same failure can happen if there is a driveshaft or rear end failure at any point when power is being applied.
The same failure can occur when you shift into neutral at the top end of the track.
If the drum failed, how would they know it was cracked prior? How do you know the low roller sprag didn't fail when you did an improper burnout?
Just fixing the last post so you know what part to read