How do I find out whats in my 10 bolt (with out opening it)? Im looking to get a locker and need to know what I got. Some say GM 10 bolt with C-clip,8.5",28-tooth, GM10-bolt,with C-clip,8.5",30 tooth. Im not even sure what a C-clip is. I think it holds the axle but not sure. If someone could help me identify my rear end that would be great. Thanks.


94,silverado,1500,Xcab,4x4,31x10.5R15 - 96 ZJ laredo 4x4 2"Lift,31x10.5R15 bfgAT/KO, k&n

I believe you have the 30 spline c-clip style. The 10 bolt through 14 bolt sf are c-clip axles. The c-clips are what hold the axleshafts in place.

Jason
Big Willy Style
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I second what Jason says. In the 88 to 98 trucks everything before 92 is 28 spline, in 92 they phased the 28 spline out for the 30 spline so the 92's are iffy (you don't know what you've got until you tear into it), after that they were all 30 spline. So you've got the 10 bolt with an 8.5" ring gear and C-clips hold the 30 spline axleshafts into the 30 spline carrier. If you are looking into carrier replacement type lockers then you've done all the homework that's necessary, but if you are looking for a drop in type locker (replaces side and spider gears but retains stock carrier) you need to find out if you have the posi rear end, because I think it does make a difference (if this is the case look for G80 in the glove box).

<font color=red>Nearly no mods...lots to come[img]/wwwthreads_images/icons/cool.gif[/img]

Actually, they introduced the 30 spline 10 bolts in 1990, but they were very sporadic at first with them. By 1992 they were all 30 spline in the 4x4's. Some of the 92 2wd's had 28 spline axles.[img]/wwwthreads_images/icons/tongue.gif[/img] Confusing, no?[img]/wwwthreads_images/icons/wink.gif[/img]


Still got it......

Hmmmmm, thanks for the clairification AJM!

I was just going on an old 4x4 power magazine that said that, and every axle I've worked on has confirmed it for me (not that you're wrong, I don't work on them every day). I guess I've just not seen a pre 92 30 spline 10 bolt.[img]/wwwthreads_images/icons/crazy.gif[/img] Once again I'll thank you for the clairification because the false notion may have caused me or someone else parts ordering grief in the future.

<font color=red>Nearly no mods...lots to come[img]/wwwthreads_images/icons/cool.gif[/img]

No problem man. It's one of those things that GM had "issues" with. Like the change over from 12 bolt to 10 bolt in 1977.........no 1981...........wait, it's 1979...........but my buddy said it was 1980...............[img]/wwwthreads_images/icons/tongue.gif[/img][img]/wwwthreads_images/icons/laugh.gif[/img]

The change over from the D44 front to the 10 bolt front is just as bad. So is the 14SF taking over from the 14FF in the 80's some time.

I've also seen a 1983 GMC Jimmy K5 that had a D44 and 12 bolt that sure looked like they were factory. Caked with mud, rust, crap, and everything else, just as much as the rest of the truck. Nothing looked cobbled together, and everything seemed to be factory. Yet many people will tell you they stopped using both of them in the late 70's.[img]/wwwthreads_images/icons/tongue.gif[/img] GM must have just had some sitting around in a back room.[img]/wwwthreads_images/icons/smile.gif[/img]


Chrome sucks
285/75R16, 255/85R16, & 305/70R16 fit on a stock GM IFS fullsize 4x4 truck when on the stock 16x7 rims.