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turbo 400 rear seal
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Paul P
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Joined: 15 Aug 2002
Posts: 2393
Location: Townsend, Mass.
81240.86 points


1971 Chevrolet Chevelle

PostPosted: Mon Aug 29, 2011 10:35 pm    Post subject: Reply with quote

so the pics are holding all the cards now....
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2001 Focus 2.0 Zetec
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N.A.
6.95@98.6 MPH 1/8mi
10.97@121 MPH 1/4mi
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Knarley Darley
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Joined: 22 Apr 2004
Posts: 1247

540230.26 points



PostPosted: Fri Sep 02, 2011 5:39 pm    Post subject: Reply with quote

I am pretty sure there were 2 different t-400 O.D yoke sizes, but some one also brings up a good point on the bushing matching the seal. Also the 3/4 ton trucks and Suburbans had a bolt on yoke rather than a slip yoke which is the same spline, but has a shoulder on the out put preventing a slip yoke from going in very far (it has to be machined off or changed to a car output shaft.) The other thing is some yokes had a hole in the center and the last 1- to1 1/2 of the slip yoke inside the trans has no splines (smooth) so it can seal over a "O" ring that prevented oil from leaking out of the little center hole. If that "o" ring is on the out put shaft and the yoke is not machined to accept it, it will hit it preventing it from going in all the way. In that case you can unbolt the tail housing and remove the "0" ring. My 70 Elcamino has the original T-400 and uses the thick short yoke. Is your yoke splined to the end or smooth inside at the end? And how long s it. The skinny O.D. "0" ringed ones are like 2" longer than the other ones. I would just pull the seal and see if it will clear the bushing in the tail housing. If it does than order a seal for a 70 GM car with a turbo 400 and it should work. If not than you have to change the yoke or the tail housing.
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87IrocTim
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Joined: 10 Jan 2006
Posts: 448

16836.12 points



PostPosted: Tue Sep 06, 2011 3:21 pm    Post subject: Reply with quote

it was hard for me to get pics cuz i have a crappy cheepo phone. (dropped my expensive one in the toilet. drinking was involved.) so i cant send the pics to my computer and i dont haev a digital camera.

but i have solved the issue and sir knarley darley is correct. i just bought a standard tailshaft seal and ripped the old one out, jon wayne'd the new one in.

i just got done ordering all the lines and fittings i need to install the tranny cooler, and a little tranny service kit. just about to order some cheap 3 inch mufflers, complete with muffler bearings and blinker fluid, and as soon as it stops raining over here i can finish her up.

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"Aerodynamics are for people who can't build engines." -Enzo Ferrari
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af2
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Joined: 01 Sep 2003
Posts: 5557
Location: grassvalley, ca
71191.50 points


1933 Willys Coupe

PostPosted: Tue Sep 06, 2011 8:26 pm    Post subject: Reply with quote

87IrocTim wrote:


but i have solved the issue and sir knarley darley is correct. i just bought a standard tailshaft seal and ripped the old one out, jon wayne'd the new one in.


NICE! Laughing
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Tue Sep 06, 2011 8:55 pm    Post subject: Reply with quote

sounds like a simple solution get 400 seal, inspect bushing for play,install seal,then go play Laughing
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