The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Rear end ratios....What can I really change mine to?

65Guy · 01-15-2012, 09:28 PM

well with a gear that short you problly have a series 4 carrier which is the part that the ring gear bolts to. the lowest you can go with a 4 series is 3.73. if you want to go lower you will have to change the carrier. and im pretty shure any thing from a 65 all the way to a 87 if its truck 12 bolt it will fit, and if it is all stock you might consider blowing it all apart for a full rebuild. Bearings and seals.

01-15-2012, 09:28 PM	#2
65Guy Registered User Join Date: Feb 2010 Location: Loganville, Ga Posts: 170	Re: Rear end ratios....What can I really change mine to? well with a gear that short you problly have a series 4 carrier which is the part that the ring gear bolts to. the lowest you can go with a 4 series is 3.73. if you want to go lower you will have to change the carrier. and im pretty shure any thing from a 65 all the way to a 87 if its truck 12 bolt it will fit, and if it is all stock you might consider blowing it all apart for a full rebuild. Bearings and seals.