dlove

iTrader: (23)

Ok so im putting a th400 w/ 9'' tailshaft in w/ a stock rear end.

now stock driveshaft length is 40.5''

4l60e length is about 31''

th400 length is about 34''

from the stock dimensions that equals 71.5''
31+40.5=71.5


now for the th400 couldnt i just use
34+X=71.5 which is of course 37.5''

now going off that how accurate is that? I dont really feel like putting the th400 up in there just to figure out what I already can figure out on paper.

What sizes DS have you ordered for a th400 swap with stock rear end? should I just get one 2'' shorter?

dlove

iTrader: (23)

no one knows what there ds length was with a th400 9'' tailshaft and a stock rear?

MeentSS02

iTrader: (11)

You'd probably have better luck asking in the drag racing tech section...most people with a setup like that would hang out in there.

ccsanders01

iTrader: (1)

one way to measure for a shaft is to jack the rear up as it would be sitting at ride height, then measure from the rear seal of trans to the center of rear u-joint. take that measurement to the shop. they can figure out the slip it needs from there.

ccsanders01

iTrader: (1)

another way to measure for a driveshaft if you have the slip yoke. put the yoke all the way in till it bottoms out, then pull it back out 3/4-1 inch then measure from center of where the ujoint should be to the center of the rear yoke.then you have center to center of u-joint.i worked for a driveline shop, made many shafts. the rear end has to be at ride height also.

EPP

iTrader: (22)

If we are supplying you with transmission slip yoke, pinion yoke and driveshaft yoke measure Dim W.

If we are supplying you with transmission slip yoke and driveshaft measure Dim X.

2 Piece driveshafts use Dim Y + Z.

Hope this helps. Bob