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Old 03-29-2012, 03:50 PM
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T-400 yoke problem

I bought a 2" longer yoke for my TH350 to TH400 swap and it wont slide in past the seal but it slides onto the shaft do I need a bigger seal?
thanks.

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Old 03-29-2012, 04:05 PM
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Is your 400 out of a truck.

Car is a slip yoke and trucks are bolt type, they won't inter change without some maching.
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Old 03-29-2012, 06:09 PM
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^^^ yes...does your output shaft have a threaded hole in the center of it??....and how about the inside of the yoke,is it splined all the way,or is it smooth for the first 2 inches or so?....and is it a new or used yoke?...questions for possible further suggestions.
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Old 03-29-2012, 08:13 PM
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There is 2 different seal & bushing diameters for the Th-400.
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Old 03-29-2012, 09:01 PM
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thanks pro 69 I bought the new slip yoke and yes the TH400 is slip yoke style I bought a 2" longer yoke it wont slide past tailshaft housing can I just get another one the diameter of the yoke is too big for the housing it fits the splines though
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Old 03-29-2012, 09:04 PM
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oh, and I was told it was out of a truck it has a hole in the center but it isn't but a 1/4 inch deep and I dont think it is threaded I may be wrong I will double check though
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Old 03-29-2012, 09:07 PM
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also new yoke. the shaft is splined all the way thanks for the help as always

Last edited by bbowerman; 03-29-2012 at 09:14 PM.
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Old 03-29-2012, 09:09 PM
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my last pic is of the tranny it has some numbers and stuff tacked on the side if that may help in any way?
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Old 03-29-2012, 09:12 PM
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ok sorry for blowing this thread up I used my micrometer and the slip yoke that is too large's diameter is 1.88

Last edited by bbowerman; 03-29-2012 at 09:20 PM.
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Old 03-30-2012, 02:07 AM
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If the seal journal on the slip yoke is too large, you need a tail with a larger bore or you need a yoke with a smaller journal.
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Old 03-30-2012, 06:13 AM
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ok I will look for another tal because that yoke was hard to find as it is.
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Old 03-30-2012, 10:47 AM
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If you think the yoke was hard to find!?? The housing can be worse. There's an E bay place that has all the yokes for T-400's and others. Offshore, I'm sure, but I got one and it's actually pretty good. If you really get in trouble, I have a housing and yoke left over since I went to a bolt on overdrive unit. You can PM me if needed.
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Old 03-30-2012, 12:05 PM
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A yoke is available... Spicer# 2-3-5281X But the yoke is 5.188 long and may not be long enough for you. The seal surface is 1.688.
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Old 03-30-2012, 01:48 PM
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thanks for the help I think this is the most helpful forum online and thanks for the yoke part number and seal surface prostreet6t9
the barrel I need is exactly 2" longer than the TH350 yoke.
I don't remember the length of the TH350 but I will look again when I get home.
also does this mean my TH400 came out of a car since the dimension is smaller.
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Old 03-30-2012, 02:01 PM
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maybe this thread can help others doing the TH350 to TH400 swap I will look up that part and see if it will work or try and hunt down another.

also It would be helpful if you knew the sellers name I am still looking

Edit: I cant find any that fit the 1.6 that are 6.94 or 7" long which is what I need

Last edited by bbowerman; 03-30-2012 at 02:19 PM.
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