Transmission Swaps - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LennyGB53 · 11-07-2010, 09:38 PM

I got a good deal on a TH350. My truck had a TH350 short shaft. I put the 400 in and I'm about 1/2" - 3/4" too short to make it work. I loosened my motor mounts and we got the drive shaft in. However, it was way too tight and would have broken had we attached the center bearing support. Does anyone have any ideas why or what I can do? The TH400 has a much larger diameter yoke than the TH350 had. I purchased a combination u joint, 1330 and 1350 to make it work. So close yet so far.

I appreciate help from anyone who's done this swap before.

11-07-2010, 09:38 PM	#1
LennyGB53 Registered User Join Date: Nov 2008 Location: East Peoria, IL Posts: 149	Transmission Swaps I got a good deal on a TH350. My truck had a TH350 short shaft. I put the 400 in and I'm about 1/2" - 3/4" too short to make it work. I loosened my motor mounts and we got the drive shaft in. However, it was way too tight and would have broken had we attached the center bearing support. Does anyone have any ideas why or what I can do? The TH400 has a much larger diameter yoke than the TH350 had. I purchased a combination u joint, 1330 and 1350 to make it work. So close yet so far. I appreciate help from anyone who's done this swap before.



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