1985 c10 rearend - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WETOWM · 03-16-2022, 04:03 PM

I have a 1985 c10 2wd pickup is the 8.5 rearend a 28 or 30 spline axle

GRADYS Performance · 03-16-2022, 05:01 PM

30 Spline

Rich84 · 03-17-2022, 08:32 AM

I thought that they went to 30 spline in 88. My 84 was 28 spline.

WETOWM · 03-17-2022, 09:11 AM

I was wanting to order a posi unit for it before I took it apart and want to order the right one I guess I may have to take it apart to be sure ?

**THI** · 03-17-2022, 11:17 AM

Quote:

Originally Posted by Rich84

I thought that they went to 30 spline in 88. My 84 was 28 spline.

1989 was the official change to 30-spline for square bodies, some 1988's did receive 30-spline in late production vehicles. I found this out with a 1988 K20 Suburban - was supposed to be 28-spline front with an NP208 transfer case, mine was built June 1988 and had 30-spline axles in the front with an NP241 t-case.

03-16-2022, 04:03 PM	#1
WETOWM Registered User Join Date: Jun 2011 Location: ST LOUIS MO Posts: 2,119	1985 c10 rearend I have a 1985 c10 2wd pickup is the 8.5 rearend a 28 or 30 spline axle

03-16-2022, 05:01 PM	#2
GRADYS Performance Registered User Join Date: Dec 2013 Location: Columbus, Oh Posts: 367	Re: 1985 c10 rearend 30 Spline

03-17-2022, 08:32 AM	#3
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,708	Re: 1985 c10 rearend I thought that they went to 30 spline in 88. My 84 was 28 spline.

03-17-2022, 09:11 AM	#4
WETOWM Registered User Join Date: Jun 2011 Location: ST LOUIS MO Posts: 2,119	Re: 1985 c10 rearend I was wanting to order a posi unit for it before I took it apart and want to order the right one I guess I may have to take it apart to be sure ?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.