How far in should the slip yoke be? & Driveshaft ?'s - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

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Old 06-30-2007, 02:45 PM
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How far in should the slip yoke be? & Driveshaft ?'s

When I Bought my th400 it didnt have a slip yoke in it. I had the normal short shaft and short output housing so I got one from a seller I have bought parts from in the past on ebay.

But.......Im not for sure how far my slip yoke should be in to measure for a drive shaft? My Original driveshaft is a few inches short and will need to be lenghthend.

I assume they will have to use a different yoke on one end because the slip yokes u-joint holes are bigger than the ones on my yoke. Correct or do they have a u-joint with two differant caps on it?

Im pretty new at this but Im to the point I need my Driveshaft built and I want to make sure measure and get it exact.

Any input?

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Old 06-30-2007, 03:09 PM
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The slip yoke uses about half, if the yoke is 6in the out put shaft goes in 3in. I am planing on using a chevy 350 to a ford 9 and can have the drive shaft made with the two different sized u joints. There is a trick to measuring for the drive shaft. For instance take measurements at ride hight. Try a web site for custom drive shafts, they usually will tell you how to do this even allow a doc to download for your own reference. I am sure you could find a local shop, preferred with specs. in hand will do a nice job for you.
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Old 06-30-2007, 03:09 PM
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Do you have a local drive shaft company? If so, give them a call and ask them for their suggestions. I know that are "some" u-joints with different caps for certain popular applications/swaps. Also, the "slip distance" can differ some depending on rear end travel, but usually, 1" out from fully seated into the trans is a safe bet.
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