I just recently got a 1990 chevy suburban and i need to know the transmission that came in it! so i can replace it.

Asked by May 24, 2010 at 12:53 AM about the 1990 Chevrolet Suburban

Question type: Maintenance & Repair

it wont go out of 2 gear registered as non op so i can work on it please help and any info on a ECU for a geo storm in the sacramento area.

4 Answers

975

Im pretty sure it has a 700R4, sounds like you might have a valve body failure, might be a pan fix, it shifts hydromechanically as opposed to a newer 4L60E (essentially next gen 700R4) that has electronic controls.

1 of 1 people found this helpful.
665

hey, i had the same year also wondering, i lost reverse... then 4th/overdrive, then third then second if i kept it in drive when it whent to shift up it was like hitting nuetral. you think it was shot or an easy fix?

975

Sounds like a loss of line pressure or a really screwed up valve body, can you go through the gears by moving the shifter manually?

665

lol no i tried that too, once overdrive and 3rd stoped working i kept it in second manualy that way it wouldnt try to shift up into nothing, that would be cool if it was line pressure but the engines out of it now anyway

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