need help

**SCbuick010** · 09-27-2011

okay so the stock trans in my '99 gtp is basically shot. I got a free trans from my teacher at school. Im like 99% sure its a 4t65e, but im no trans expert. The trans I got for free needed rebuilt, so i tore it apart and nearly all the clutches were burnt up and felt gritty. The wavy imput clutch was also broke in 3 pieces. I ordered a master kit w/steels + a new wavy imput clutch. The trans will be getting put back together tomorrow. I ran what i believe the casting number through google and I believe its out of a '98 regal. The number I got from the trans is:

GM-B
24209508
923

Can anyone clarify what this trans was pulled from. And if it is from a '98 regal will it bolt up fine to my '99 gtp (cooler lines and all)?

**Fivefingerdeathpunch** · 09-27-2011

you will need to tune teh computer to be able to run it tho,

4t65e are 3.29's

your stock gtp gears are 2.93.

**BillBoost37** · 09-28-2011

???? FFDP, you know better, no Regal came with 3.29's. Only things that came that way were GP GT's and Comp G's.

Originally Posted by Fivefingerdeathpunch

you will need to tune teh computer to be able to run it tho,

4t65e are 3.29's

your stock gtp gears are 2.93.

Get the trans info from the tag on the back of the trans by the diff cover. That's how you tell what it is.

If it came from a Regal, it's either a 2.93 HD or a 3.05/3.06 (I can never remember which was 65 and which was 60).

Easy way to tell if it's a 4T65, the main electrical plug will be on the upper driverside of the trans. A 4T60 is on the front.

**SCbuick010** · 09-28-2011

okay well then its definitely a 4t65 then judging by the main electrical plug location. and i cant find any of those numbers on this trans Bill

**BillBoost37** · 09-28-2011

There should be a tag by the diff

If not..then you can't 100% know everything about it, because that casting number means very little.

If you pull an pan bolt and it's an M6 bolt, it's 98+, M8 is 97. Beyond that, you'd have to count teeth on the drive/driven gears and the sungear to know the ratio.

**SCbuick010** · 09-28-2011

there is a tag but i cant find 2.93 HD or 3.05/3.06 on it anywhere

**Fivefingerdeathpunch** · 09-28-2011

well fek bill, i forget

Thread: need help

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