The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Question about rear end change and trans leak

**Captkaos** · 08-20-2008, 11:10 AM

Can you tell for sure where the leak is coming from? Did you replace the trans pan? If it is leaking from the pump, you have to take it out.

Going to a 12bolt isn't going to gain you anything, save the trouble and stay with the 10 and just upgrade the internals. 2.73's were the norm in all the 81-87's. Personally if it is a driver, I would get 3.42's, but 3.73's won't be too bad with the OD.

If you really want a 12bolt, anything from 73-81 2WD will bolt in on the springs, but will require a different u-joint to work.

08-20-2008, 11:10 AM	#2
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Question about rear end change and trans leak Can you tell for sure where the leak is coming from? Did you replace the trans pan? If it is leaking from the pump, you have to take it out. Going to a 12bolt isn't going to gain you anything, save the trouble and stay with the 10 and just upgrade the internals. 2.73's were the norm in all the 81-87's. Personally if it is a driver, I would get 3.42's, but 3.73's won't be too bad with the OD. If you really want a 12bolt, anything from 73-81 2WD will bolt in on the springs, but will require a different u-joint to work. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com