I'm looking for information on my 1987 3/4 ton v-20 4x4 pickup. The front diff. has 10 bolts and on the back it has GM 9",the axle shafts have 30 splines. The rear is a 14 bolt, and on the back it has GM 10". Im looking to buy lockers and wondering what is the true size of the ring gear ? I know the 14 bolt has two different sizes. Also do these have c-clips?
<font face="Comic Sans MS">Is the rear differential semi floating (like a regular axle) or full floating (massive hubs sticking out in the middle of the rims with 6 or 8 bolts holding the end cap on the hubs)... If it's semi floating then it's the 9.x"... If it's full floating it's 10.5". And to be sure just tell the shop you have a GM Corporate 14 bolt semi floating axle (assuming you have one of those) or a GM Corporate 14 bolt full floating axle (if you have that beast), if the shop is worth their salt, they'll know exactly what you're talkin' about...
The 14 bolt SF axle has C clips but the 14 bolt FF has no C clips...
The front diff should be a corporate 10 bolt? I believe... The Dana 44 was the one they stopped using in the early 80's right? That's the part I'm not sure about... </font>
The front is a Corporate 10 bolt, it's ring gear is 8.5" in diameter.
Does the rear have big hubs that stick out past the center of the vehicle's rims/wheels? If so, it is a 14 bolt Full Floater (no C-clips) with 10.5" ring gear. If there is no hub sticking out, it's a 14 bolt Semi Floater (has C-clips) with 9.5" ring gear.
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