Turbo 400 problems
#1
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Turbo 400 problems
A friend and I rebuilt a th400 last year including a B&M trans pak. It later broke the intermediate roller clutch race so we replaced it with the same type (against my suggestions) he sold the truck too a friend of his, now his friend broke it again and paid a shop $800 to replace the roller clutch and some other parts with 4L80E parts, I am not familiar with this type of upgrade. They put the trans in the truck and it now has no 2-3 shift. I helped them and checked the governor, detent soliniod and modulator valve. The pan is full of large aluminum chunks. They are removing the trans for me to fix. What should I look for as far as misbuilds? It has a new TCI streetfighter converter. What are the chances of this being bad from the factory? I have a stock th400, could it's int.roller clutch handle the 420HP in this 4000 pound truck if I keep the waved plates in and leave the valve body stock? I may just swap transmissions but I don't want it to fail again.
Any suggestions are welcome and apreciated, Thanks..
PS the trans shop went out of business.
[This message has been edited by Jay 727 (edited November 16, 2001).]
Any suggestions are welcome and apreciated, Thanks..
PS the trans shop went out of business.
[This message has been edited by Jay 727 (edited November 16, 2001).]
#2
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Could be about anything. Best to just get it open and report back to us. Bad converter from the get go? Hmmm, I've only seen that a couple thousand times or so, so maybe.
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Well I got it apart and found the outer most sealing ring on the center support off and in the middle oil groove. I believe this is the direct circuit oil ring so I guess this is the problem. I still haven't found the source of all the alum particles. Don't really feel like working on it so I'll disassemble it more later to look for other problems.
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