The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - I want a 3.08 6-lug rearend

**CC69Rat** · 01-13-2024, 04:32 PM

I have owned a 70 GMC, 6 lug wide axle. I'm not sure if maybe the variable is GMC / Chevrolet? But I just thought it would be worth mentioning.

The early axles are 30.5" long, measured from the end of the splines to the mounting / surface where the wheel mounts. Correct for the 55.5" wide housings.

The later, 57" housing takes a 31 5/16" wide axle.

But yeah, the 70 6 lug axles can cause issues with wheel backspacing. Ask me how I know.. lol.

The plate to plate method is just an easy way to check to be exactly sure which one you need either for a straight housing swap or, to convert to 5 lug. I double check them to be sure they haven't been swapped at some point in their lives, we just never know I guess.

Hope this helps.

01-13-2024, 04:32 PM	#9
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: I want a 3.08 6-lug rearend I have owned a 70 GMC, 6 lug wide axle. I'm not sure if maybe the variable is GMC / Chevrolet? But I just thought it would be worth mentioning. The early axles are 30.5" long, measured from the end of the splines to the mounting / surface where the wheel mounts. Correct for the 55.5" wide housings. The later, 57" housing takes a 31 5/16" wide axle. But yeah, the 70 6 lug axles can cause issues with wheel backspacing. Ask me how I know.. lol. The plate to plate method is just an easy way to check to be exactly sure which one you need either for a straight housing swap or, to convert to 5 lug. I double check them to be sure they haven't been swapped at some point in their lives, we just never know I guess. Hope this helps. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)