Author Topic: drive shaft length  (Read 529 times)

Offline gwcrim

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drive shaft length
« on: November 21, 2020, 08:26:37 AM »
In my last topic I shared the story of my bad thrust bearing.  I'm still searching for an answer.  Here's a possibility.  The drive shaft is too long.  Not by a lot but it barely fits in. Maybe 1/4 to 1/2 inch too long.  Is it possible that it would have put pressure on the converter and then on to the engine thrust bearing?

Offline JohnnyPopper

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Re: drive shaft length
« Reply #1 on: November 23, 2020, 08:44:18 PM »
I'm not an expert AT ALL, but that would mean that the extra thrust would affect all of the components from the tail shaft to the spring plate. I would expect that you would have more problems than just the thrust bearing.
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline SilverMiner

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Re: drive shaft length
« Reply #2 on: November 24, 2020, 07:00:05 PM »
I agree with JohnnyPopper, and actually have second-hand experience with a too long driveshaft. If in fact your driveshaft was too long and had jammed into the rear of the transmission and then into the engine, you would have known it the instant it occurred. A buddy of mine had this happen in his 71 Buick GS while I was a passenger, and you wouldn't believe the horrible sounds it made as the rear suspension compressed and shoved the driveshaft into the trans. In his case the damage was all contained (and absorbed) by the TH400 trans. I hope to never hear that noise again.