chevy axles - Off-Road Forums & Discussion Groups
GM Standard IFS Trucks & SUV's All discussion of full sized IFS Trucks, SUV's to include Suburban

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-26-2001, 06:22 PM
Posts: n/a
chevy axles

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?

Sponsored Links
post #2 of (permalink) Old 08-26-2001, 06:42 PM
Join Date: Sep 1999
Posts: 6,517
Thanks: 0
Thanked 0 Times in 0 Posts
Re: chevy axles

<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>

Tim "Sandman"

ORC Land Use columnist:
My May Column
The_Sandman_454 is offline  
post #3 of (permalink) Old 08-26-2001, 06:45 PM
Mud in my Veins
Join Date: Mar 2000
Location: Paducah, KY
Posts: 6,656
Thanks: 0
Thanked 0 Times in 0 Posts
Re: chevy axles

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.

1992 Blazer Sport, 350, 4L60, Rancho 2"[img]/wwwthreads_images/icons/tongue.gif[/img], 285/75R16 AT's, K&N, Flowmaster, MSD[img]/wwwthreads_images/icons/laugh.gif[/img]
Aircraft, Cars, and Me
AJMBLAZER is offline  
Sponsored Links
post #4 of (permalink) Old 08-26-2001, 08:26 PM
Posts: n/a
Re: chevy axles

andrew - you mean the FRONT is a corp 10 bolt....dont confuse anyone! haha

Mike ~
* Earnhardt Forever *

89 Chevy K1500 some goodies, but not enough! [img]/wwwthreads_images/icons/tongue.gif[/img]
post #5 of (permalink) Old 08-26-2001, 10:30 PM
Posts: n/a
Re: chevy axles

Your front diff is an 8.5" 10-bolt. Front axles do not have c-clips. It should have 28-spline axles unless the front axle was swapped from an 88-91 2500 Suburban.

This a pic of the 14-bolt semi-floater:

This is a pic of the 14-bolt full-floater:

'91 V3500 Crewcab, bobbed, SM465/NP205, D60/14FF, 4.10, 12k Warn, dual batts, 2" body, Blazer fuel tank.
post #6 of (permalink) Old 08-27-2001, 10:54 AM
Posts: n/a
Re: chevy axles

Could you post the photos again along with any others that you might have to a special post called "differential photos" or something like that.

Those are great identifiers and that way when we get these questions there is an easy answer.

Shane Bevel

The Roanoke (VA) Times Photo Department
1986 3/4 ton 4x4 'Burban 5.7L Vortec Powered
2000 Specialized Rockhopper FSR
[img] [/img]
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome