Pontiac GTO 2004-2006 - help me rebuild my gtos rear end
03-30-2012, 01:54 PM
Hey guys I have a 04 m6 pbm gto that is mostly stock other than coil overs all the way around. I've collected:
Gforce 3.91 gears
Gforce major seal and bearing kit.
Is there anything else I need I heard I may need the part or gear that goes in each end of the posi. I'm not sure what the part is called just know the axles bolt to it on the outside of the differential. Also are there any good builders in houston??
03-30-2012, 02:46 PM
...I see this going bad places. lol
Call Chris at Gforce and talk to him. Really great guy to deal with and talk to.
03-30-2012, 02:55 PM
...... HA umm, yeah what he said. ^^
03-30-2012, 03:21 PM
Umm yeah considering I'm at work and I let my best friend have my password to post up. That Brat! Anyways, yeah I've had some others recommend G force and I've been planning to contact them. Someone from the Houston goat herd mentioned another builder though and I can't for the life of me remember who it was. They also mentioned that I might be missing two smaller gears for the build. Gforce used to have them on their website but that part has been taken down and I can't find reference to them anywhere else. If anyone knows what these might be or a link that is all I'm really looking for. That and the contact you guys have given me now. Thanks for not ripping me up on here. I was about to kill him when I saw the title. Thought dear God in heaven all the leg humpers will be out!
03-30-2012, 05:57 PM
If the car is mostly stock and you dont plan on doing anything crazy to it, i think the 4.10's would be a great to improve the car.
He's probably referring to the 3.73 or short run of(not sure if theyre doing it anymore) 3.70's
On a stick car, youre probably not going to notice much if an improvement over the stock 3.46's.
3.91's at the minimum. I'd personally do the 4.10's
03-30-2012, 07:32 PM
I plan a cam. I opted for the 3.91 as opposed to the 4.10 based on some research and I don't plan on boost. I think this baby stays N/A. I think the 3.91 with the trutrac is probably gonna give me the power I want out of her.
I think you are referring to the side adjusters.
04-11-2012, 06:24 PM
Gforce1320 will be doing my next and hopefully last set of 3.91's. Current 3.91's are LOUD and Whiney done by Billy Bob on the back porch. I know their not close to Houston howver I think it would be worth the shipping or road trip for that matter :)
I am in the same boat. Recently had a local shop build a rear with 3.91's and a truetrac and they were so loud I had to send the rear out to CSP to see what is going on.
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