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turbo 400 to dana 20

1980cj5

Well-Known Member
Joined
Jun 22, 2009
Messages
212
Location
Bonney Lake
Tonight I pulled the stock quadratrac T-case out of my buddys 81 j-10. I was wondering if a dana 20 would bolt up to the th400, and if not what selectable T-case should bolt up to the th-400 as is, or will he need an adapter.
 
Tonight I pulled the stock quadratrac T-case out of my buddys 81 j-10. I was wondering if a dana 20 would bolt up to the th400, and if not what selectable T-case should bolt up to the th-400 as is, or will he need an adapter.

what TH-400? Mine was a buick and had a adapter.
 
It's a PITA to switch.

You need both the adapter, and the TH400 output shaft. The output shaft requires you to completely dissassemble the transmission, and reassemble it with the correct shaft. Might as well rebuild it, as it's completely apart. The factory adapters were cast aluminum, and relatively weak (prone to breaking). The NOVAK adapters were strong.

Look around here, and on CL, and you can find a complete TH400/D20 with regularity. Pretty Cheap too.
 
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