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#1
12-01-2011, 05:51 PM
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Will late 70s transmission work in 81 SD?
I need a replacement Xmission for a 81SD and I found a good deal on a rebuilt but he says its from a late 70s model and he can't find the model #722.xxx on the cast. What will and will not be compatible with a 81SD? Thanks, my search on the forum was unsuccessful.
__________________
 I LOVE CATS....AND FRIES 1981 300sd 1983 300sd 1985 300d 1983 300cd 1991 350sdl 
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#2
12-01-2011, 05:58 PM
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I'd think a 70s car would have a 722.1 not a 722.3
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#4
12-01-2011, 08:59 PM
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IIRC the number is along the bottom on the passenger side, where the pan meets the case. 722.1 doesn't use vacuum to control shift firmness. You could probably make it work? But I wouldn't when a correct trans isn't so hard to find.
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#5
12-01-2011, 10:18 PM
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Some of those earlier transmissions are not as robust either.
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