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murdoc · 02-16-2019, 02:31 PM

I'm sure that this is a topic that has been gone over, but after a thorough searching of the forum threads, I couldn't find anything. So please excuse the redundancy if the answer is already out there.

Can I use a married Rockwell T221 from a 68 K10 to replace my divorced T221 in my K10?

Here's what I have: The standard, stock rockwell from my 66 that has the common issue of a worn out input shaft.

Rear of case:

Front of case:

Here's what I acquired: The SM465 transmission with married rockwell T221 out of a 68 K10.

I got the entire SM465/T221 marriage including the crossmember, shifting linkage, handle, etc for $100.

The 68 it came out of had 106,000 miles on it when the PO rolled it, so he pulled the drivetrain before scraping the truck. It had been sitting in his garage for 18 years waiting for a build that he never got around to doing. I just couldn't pass it up. Problem is, I might have a transfercase that can't be swapped directly into mine.

I'm sure the only issue would be if the input shafts are different for a married rockwell vs a divorced. I could probably discover the answer myself by simply removing the yoke to my divorced T221 input shaft and compare the two, but you guys will likely be able to answer this for me fast than I will get around to doing that.

If I have to, I will swap out my entire SM420/T221 divorced set up for this married combo, but I really would like to keep things stock. I prefer the look and location of my divorced shifter over the married. Any help would be greatly appreciated!!

02-16-2019, 02:31 PM	#1
murdoc Registered User Join Date: Mar 2008 Location: nampa, idaho Posts: 332	Factory 4x4 experts look at these pics!! I'm sure that this is a topic that has been gone over, but after a thorough searching of the forum threads, I couldn't find anything. So please excuse the redundancy if the answer is already out there. Can I use a married Rockwell T221 from a 68 K10 to replace my divorced T221 in my K10? Here's what I have: The standard, stock rockwell from my 66 that has the common issue of a worn out input shaft. Rear of case: Front of case: Here's what I acquired: The SM465 transmission with married rockwell T221 out of a 68 K10. I got the entire SM465/T221 marriage including the crossmember, shifting linkage, handle, etc for $100. The 68 it came out of had 106,000 miles on it when the PO rolled it, so he pulled the drivetrain before scraping the truck. It had been sitting in his garage for 18 years waiting for a build that he never got around to doing. I just couldn't pass it up. Problem is, I might have a transfercase that can't be swapped directly into mine. I'm sure the only issue would be if the input shafts are different for a married rockwell vs a divorced. I could probably discover the answer myself by simply removing the yoke to my divorced T221 input shaft and compare the two, but you guys will likely be able to answer this for me fast than I will get around to doing that. If I have to, I will swap out my entire SM420/T221 divorced set up for this married combo, but I really would like to keep things stock. I prefer the look and location of my divorced shifter over the married. Any help would be greatly appreciated!!