The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Switching Rear-Ends

supermanox · 07-12-2005, 07:35 PM

I have a question. I have a 72 GMC and a 72 Chevy. The GMC has a 3:08 gear and the Chevy has a 3:73. The Chevy has a full cam and is really hitting a lick.
They both have 350 turbo's but the GMC has one hell of a shift kit in it. I'm thinking of switching the entire rear-ends, putting the 3:73 in the GMC and the 3:08 in the Chevy. Will the performance or mileage be significantly altered in either truck by this switch? Thanks for any help you guys can give me.

07-12-2005, 07:35 PM	#1
supermanox Registered User Join Date: Jun 2003 Location: Asheville, NC Posts: 36	Switching Rear-Ends I have a question. I have a 72 GMC and a 72 Chevy. The GMC has a 3:08 gear and the Chevy has a 3:73. The Chevy has a full cam and is really hitting a lick. They both have 350 turbo's but the GMC has one hell of a shift kit in it. I'm thinking of switching the entire rear-ends, putting the 3:73 in the GMC and the 3:08 in the Chevy. Will the performance or mileage be significantly altered in either truck by this switch? Thanks for any help you guys can give me. __________________ -Mike Cooper Asheville NC 1972 GMC Sierra Grande (Stock) 1972 Chevy (Not so much stock)