Yolk stuck on TH350
November 27th, 2017, 09:53 PM
#1
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Yoke stuck on TH350
I swapped a th350 for the junkaway a few hundred miles ago.
I tried taking the driveshaft off and it wouldnt budge short of me beating on it with a brass hammer.
I have not examined the splines, but has anyone else had this happen? I have not.
I tried taking the driveshaft off and it wouldnt budge short of me beating on it with a brass hammer.
I have not examined the splines, but has anyone else had this happen? I have not.
Last edited by VinMichael; November 28th, 2017 at 10:32 AM.
November 28th, 2017, 06:42 AM
#2
Registered User
Join Date: Jul 2008
Location: Seneca Falls, NY
Posts: 5,261
Since that spline is supposed to move freely when the suspension travels up and down I'd think your u-joints must be taking a beating too
Is the driveshaft too long so the yoke is bottoming out in the tranny? (I still don't think that causes it to jam though)
Last edited by allyolds68; November 28th, 2017 at 07:20 AM.
November 28th, 2017, 09:13 AM
#4
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Are you talking about the SPLINES jamming? If so you didn't index the driveshaft yoke properly when you installed it or you used the wrong yoke
Since that spline is supposed to move freely when the suspension travels up and down I'd think your u-joints must be taking a beating too
Is the driveshaft too long so the yoke is bottoming out in the tranny? (I still don't think that causes it to jam though)
Since that spline is supposed to move freely when the suspension travels up and down I'd think your u-joints must be taking a beating too
Is the driveshaft too long so the yoke is bottoming out in the tranny? (I still don't think that causes it to jam though)
I didn’t know it was supposed to be indexed into the tailhousing a certain way.
I thought the th350 is the same length as the 2 speed so I didnt questions the length.
That would suck. Why would this bushing go bad? I replaced all the bushings previously
November 28th, 2017, 09:21 AM
#5
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,311
That would suck. Why would this bushing go bad? I replaced all the bushings previously
November 28th, 2017, 10:43 AM
#6
Registered User
Join Date: Jul 2008
Location: Seneca Falls, NY
Posts: 5,261
)
November 28th, 2017, 10:45 AM
#7
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,311
I don't know about the Jet-a-way or TH350 but when I installed my yoke in the Muncie there was one flat spot on the splined tailshaft and if the corresponding spot in the yoke didn't line up with it the yoke wouldn't go on. (Although it probably would have if I beat it on with a hammer but then I never could have gotten it off )
)
November 28th, 2017, 10:51 AM
#8
Registered User
Join Date: Jul 2008
Location: Seneca Falls, NY
Posts: 5,261
November 28th, 2017, 11:02 AM
#9
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,311
P/N 7801551 is the yoke for all 65-up TH400
P/N 7809762 is listed only for 1971-72 four speed applications.
July 14th, 2018, 01:59 PM
#11
Registered User
Join Date: Jan 2010
Location: central Indiana
Posts: 5,246
If you can’t remove the driveshaft, try removing the 4 bolts that hold the extension housing to the trans. If the trans slides off the yoke with it unbolted hopefully is just stuck in the bushing.
Since you got this from a junkyard with no prior history im going to share a WTF moment I had build a 400 for a buddy. He broke the case on his trans (shattered the case is more accurate!) after a long on the bumper wheelie ( this was a twin turbo LS in a 80 Malibu, mid 8 second car). He brought me the shattered remains of his trans, and a BOP case for me to cut the bellhousing off to bolt on a Ultra-Bell. I swapped all his good parts inio the case, all went well. He called me later and said he couldn’t get the driveshaft to go over the output shaft. Hmmmm?! I have a old yoke to check spline fit and to check bushing fit in the extension housing. The yoke got the extension fine, it fit the output shaft fine, but when the 2 were bolted together it would not go on. Turns out when the car slammed down on the track in addition to tearing up the case, it also slightly bent the output shaft. It was bent just enough that the yoke would not go in. Had to tear it back down for another output shaft. If your trans came from a car involved in a bad rearend collision a bent output shaft is also a possibility.
Since you got this from a junkyard with no prior history im going to share a WTF moment I had build a 400 for a buddy. He broke the case on his trans (shattered the case is more accurate!) after a long on the bumper wheelie ( this was a twin turbo LS in a 80 Malibu, mid 8 second car). He brought me the shattered remains of his trans, and a BOP case for me to cut the bellhousing off to bolt on a Ultra-Bell. I swapped all his good parts inio the case, all went well. He called me later and said he couldn’t get the driveshaft to go over the output shaft. Hmmmm?! I have a old yoke to check spline fit and to check bushing fit in the extension housing. The yoke got the extension fine, it fit the output shaft fine, but when the 2 were bolted together it would not go on. Turns out when the car slammed down on the track in addition to tearing up the case, it also slightly bent the output shaft. It was bent just enough that the yoke would not go in. Had to tear it back down for another output shaft. If your trans came from a car involved in a bad rearend collision a bent output shaft is also a possibility.
Thread
Thread Starter
Forum
Replies
Last Post
