Quote:
Originally Posted by ChevyTech
1991 would be an OBD1 system.
MXO - MERCHANDISED, TRANS, AUTO PROVISIONS, O/D
MT1 - TRANSMISSION, AUTO, 4 SPD, THM R2
The RPO codes mean it has a 4 speed automatic transmission with overdrive.
I really doubt it has an electronically shifted 4L80E.
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Thanks for the reply . I was using " RPO codes.com " and they were saying MT1 is 4L80E . Anyways it has no throttle valve cable with only wires and connectors . Here is what I have . Thanks