10 Bolt differences between '87 and '88 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blue'66 · 01-24-2002, 08:31 AM

Is there a difference in the 10 bolt rear end from the 81-87 C-10's to the 88+ C-1500's. I may need a rear end for my '88 C-1500, and was wondering what my choices are.

Thanks
-John

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'72 K-20 350,SM 465 w/33s
'66 K-20 283,SM 420
'59 Willys CJ-5
'48 Chevy Half Ton SM 420
Akron, NY

gchemist · 01-24-2002, 08:47 AM

John there is a difference. The older 10 bolts have a 27 axle spline and the 88+ have 30 spline axle shaft. The older 12 bolts also have a 30 spline shaft. One reason I bolted a 12 bolt to replace mine. Use the 88 axle or find a nice old 12 bolt.

------------------
Gerardo
1983 Custom Truck
TX Plates: "BAD BOW"
http://www.geocities.com/abetterchemist/

Blue'66 · 01-24-2002, 09:30 AM

Thanks for the reply, but will the older axle physically bolt in place of the newer one, are the width and spring perches the same.

------------------
'72 K-20 350,SM 465 w/33s
'66 K-20 283,SM 420
'59 Willys CJ-5
'48 Chevy Half Ton SM 420
Akron, NY

gchemist · 01-24-2002, 04:46 PM

John,

The rear ends from the first years of the 88+ models will bolt right in. The only difference is how they are bolted up. The new style have the "U" turned 90 degrees from older style. The older style have the U bolts on the axel itself. The new style don't. Just check the photos on my setup and compare it to your setup. http://www.geocities.com/abetterchem...ustombars.html
------------------
Gerardo
1983 Custom Truck
TX Plates: "BAD BOW"
http://www.geocities.com/abetterchemist/

[This message has been edited by gchemist (edited 01-24-2002).]

01-24-2002, 08:31 AM	#1
Blue'66 Registered User Join Date: Dec 1999 Location: Akron, New York Posts: 379	10 Bolt differences between '87 and '88 Is there a difference in the 10 bolt rear end from the 81-87 C-10's to the 88+ C-1500's. I may need a rear end for my '88 C-1500, and was wondering what my choices are. Thanks -John ------------------ '72 K-20 350,SM 465 w/33s '66 K-20 283,SM 420 '59 Willys CJ-5 '48 Chevy Half Ton SM 420 Akron, NY __________________ '48 1/2 ton 3100 '55 1 1/2 ton 4400 '59 Willy's CJ-5 '65 3/4 ton 4x4 '70 C-10 All drivers, no show trucks.

01-24-2002, 08:47 AM	#2
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	John there is a difference. The older 10 bolts have a 27 axle spline and the 88+ have 30 spline axle shaft. The older 12 bolts also have a 30 spline shaft. One reason I bolted a 12 bolt to replace mine. Use the 88 axle or find a nice old 12 bolt. ------------------ Gerardo 1983 Custom Truck TX Plates: "BAD BOW" http://www.geocities.com/abetterchemist/ __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-24-2002, 09:30 AM	#3
Blue'66 Registered User Join Date: Dec 1999 Location: Akron, New York Posts: 379	Thanks for the reply, but will the older axle physically bolt in place of the newer one, are the width and spring perches the same. ------------------ '72 K-20 350,SM 465 w/33s '66 K-20 283,SM 420 '59 Willys CJ-5 '48 Chevy Half Ton SM 420 Akron, NY __________________ '48 1/2 ton 3100 '55 1 1/2 ton 4400 '59 Willy's CJ-5 '65 3/4 ton 4x4 '70 C-10 All drivers, no show trucks.

01-24-2002, 04:46 PM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	John, The rear ends from the first years of the 88+ models will bolt right in. The only difference is how they are bolted up. The new style have the "U" turned 90 degrees from older style. The older style have the U bolts on the axel itself. The new style don't. Just check the photos on my setup and compare it to your setup. http://www.geocities.com/abetterchem...ustombars.html ------------------ Gerardo 1983 Custom Truck TX Plates: "BAD BOW" http://www.geocities.com/abetterchemist/ [This message has been edited by gchemist (edited 01-24-2002).] __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos



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