The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-19-2017, 11:23 PM   #1
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 56
1990 k5 8.5 with g80 posi convert to 5 lug.

I'm looking to replace the 2.70 rear end in my 82 gmc 2wd. I found a complete RE out of a 1990 k5 blazer. 3.40 with Eaton posi. Just what I'm looking for except one is 6 lug mine is 5. The k5 RE is 30 spline my axles 28. What 5 lug axles swap in. I suspect the 89-91 2wd suburban axles would. Would the 88 c10 and up 5 lug 8.5 axle swap in. That would surprise me.

Last edited by jrpontiac; 11-19-2017 at 11:29 PM.
jrpontiac is offline   Reply With Quote
Old 11-19-2017, 11:44 PM   #2
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 21,360
Re: 1990 k5 8.5 with g80 posi convert to 5 lug.

I thought the 28 spline axles weren't used until the '88+ trucks. You will need axles from a '79-'87 C10 8.5" 10 bolt ('87-'91 in the Suburbans). The '88+ trucks have a wider differential.
__________________
Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
Captainfab is offline   Reply With Quote
Old 11-20-2017, 07:26 AM   #3
D13
Registered User
 
D13's Avatar
 
Join Date: Feb 2007
Location: Memphis MI
Posts: 1,724
Re: 1990 k5 8.5 with g80 posi convert to 5 lug.

1/2 ton suburuban 2wd 88-91 should be 30 spline 5 bolt. Early 88's may be either - check carefully.
Moser will make some for you reasonable too.
__________________
1987 C10 6.2 oil burner
1987 2 ton
1982 250/TH350 beater in progress
Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping
77 1/2 ton 250, 3OTT, and hokey aftermarket AC
Plus a mess o' tractors
D13 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 11:03 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com