MUNCIE TRANS came with 80/90 GL4 gear lube... If you read articles, in Chevelle forums, some have had troubles with other oils... IF you want to keep it all GM ,I found AC DELCO GL4 only oil today at a Car Quest store that deals with AC Delco.. part # 89021672 Carl2-- Edited by 427carl at 17:20, 20...
Muncie trans came with 80/90 GL4 rated oil..Some people on the Chevelle site have had trouble with newer GL4/GL5 OILS I found oil today rated GL4 only..It came from a Car QUEST store, that deals with AC Delco.. For those who want all GM part # 89021672 Carl2