Rear Axle 4.2 gear ratio
#1
Rear Axle 4.2 gear ratio
Hi, I'm new to the site. I have a 53 GMC 1/2 ton truck that I'm upgrading the suspension. I'm looking at a rear end online that has 4.2 gear ratio, that came out of a 2002 4x4 LT. Can anyone tell me if that is 8.5 ring gear and what is the drum to drum dimension is?
#2
It is most likely a 7.6" ring gear, not an 8.5"
I'm not sure what the width measurement would be from hub to hub (disk brakes, not drums), but if a full-size truck axle will work for you, you can get them practically anywhere for almost free.
I'm not sure what the width measurement would be from hub to hub (disk brakes, not drums), but if a full-size truck axle will work for you, you can get them practically anywhere for almost free.
#3
I need the WMS to WMS to be 60 inches, that's why I'm looking at the 4x4 (without ZR2). I wanted a stronger 8.5 ring gear, preferably a 3.42 gear ratio. I've been searching every where, can't find one. When I posted on other FB groups, most of the responses were from scammers.
#4
I have the one out of my Blazer that I would happily give you for free, but I'm in California, and you're probably in Canada or something, lol.
Unfortunately, it's 200 miles away from me right now, so I can't measure it for you.
Unfortunately, it's 200 miles away from me right now, so I can't measure it for you.
#5
I'm in Texas. If it came out of a 4x4 without the ZR2, it's 60 inches. The 2WD is about 4 inches shorter. Does it have the 8.5 ring gear? Also, I have family in Redwood City that can ship it for me.
Last edited by tlarge8032; 07-09-2022 at 01:25 PM.
#6
#10
A 12-bolt is only marginally stronger than a 10-bolt, and it's going to cost quite a bit more. You would be better off with a 14-bolt semi-floater. Coincidentally, I also have one of those I need to get rid of, but it has 4.88 gears, a Detroit Locker, and aftermarket axle shafts, so it probably wouldn't work very well for you.