Thread: 2.8 l tranny swap tp a 3.1

hey my name is jon and i drive a 1988 grand prix.(2.8 l v6 auto) i recently came across the problem that one of my spark plugs popped out and striped the head. i tried to retheard it but it just popped out again. so now im stuck with the issue of ethier buying a new head or junking my car. my brother used to drive a 1993 grand prix( 3.1 l v6 auto) but his tranny went out so now im trying to figure out if my tranny from the 88 will fit and work with the 93. please respond back asap with any answers or advice

yea it should bolt right up, only thing that may be a problem is your speedometer might be off, the vss may have changed between years.

Originally Posted by Liquifire

Is the 93 a multi port or sequential?

i believe it is a multi port but i could be wrong. why will one of them not work

Originally Posted by shawn3091

yea it should bolt right up, only thing that may be a problem is your speedometer might be off, the vss may have changed between years.

thats cool my speedometer is already off by like 15 in the 88. is it possible that it would increase