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Old 06-13-2020, 02:13 PM   #1
AJHack
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Join Date: Jul 2017
Location: Winston-Salem, NC
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MM7 4 Speed overdrive transmission

Does anyone know where to find a Chevy MM7 manual transmission? That is the 4 wheel drive version cast iron case. The 2 wheel drive aluminum case version is the MY6. They came in Chevy trucks from 81-88 I think. It is really a Mopar A-833 transmission with a Chevy bellhousing.
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Old 06-14-2020, 10:46 PM   #2
hatzie
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Re: MM7 4 Speed overdrive transmission

More importantly the MY6 MM7 had a GM input shaft and GM splines on the output end.
They are indeed an A833 with some oddities.
If you find one make sure you get the shifter and all three linkage arms & linkage rods.
They're fairly rare.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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