Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Chevrolet > Caprice
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools
Old 02-21-2016, 04:43 PM   #1
94HeavyChevy
AF Regular
 
Join Date: Feb 2005
Location: Berlin, Connecticut
Posts: 188
Thanks: 6
Thanked 0 Times in 0 Posts
8.5 rear end

Looking for a complete 8.5 rear end to put in my 94 caprice 5.7. Anyone have one or know a good place to get one? Local used parts/junk yards around me want 400-700 bucks for them and can't tell me what kind of gears they have.
94HeavyChevy is offline   Reply With Quote
Old 02-21-2016, 08:35 PM   #2
Blue Bowtie
Registered Offender
 
Blue Bowtie's Avatar
 
Join Date: Mar 2006
Location: Rural
Posts: 6,509
Thanks: 6
Thanked 340 Times in 335 Posts
Re: 8.5 rear end

If the axle is original in the vehicle you can open the trunk to look for the SPID label.

G80 is limited slip.

GU4 is a 3.08 ratio. That would be in an SEO vehicle or impala SS.

GM8 is a 2.56 ratio. That was standard,

GW9 is 2.93 ratio. Those were options in tow packages.
__________________
Permanent seat assignment on the Group W bench...
Automotive Forums Survival Guide
Blue Bowtie is offline   Reply With Quote
Old 02-21-2016, 09:39 PM   #3
94HeavyChevy
AF Regular
Thread starter
 
Join Date: Feb 2005
Location: Berlin, Connecticut
Posts: 188
Thanks: 6
Thanked 0 Times in 0 Posts
Re: 8.5 rear end

Vehicle originally was the 4.3L V8 and has the 7.5 rear end with 2.73s. Looking to swap a 8.5 in it!
94HeavyChevy is offline   Reply With Quote
Old 02-21-2016, 11:15 PM   #4
Blue Bowtie
Registered Offender
 
Blue Bowtie's Avatar
 
Join Date: Mar 2006
Location: Rural
Posts: 6,509
Thanks: 6
Thanked 340 Times in 335 Posts
Re: 8.5 rear end

Your closest choice of LT1 axles would be the 2.93, but those are fairly rare. 3.08s are the next toughest to find but would be an improvement for the L99. A 2.56 could be quite a load for the smaller displacement. In any case the PCM would require a reflash to get the speedo and shift points correct.
__________________
Permanent seat assignment on the Group W bench...
Automotive Forums Survival Guide
Blue Bowtie is offline   Reply With Quote
Old 02-22-2016, 08:03 PM   #5
silicon212
Confoundingly Lucid
 
silicon212's Avatar
 
Join Date: Oct 2005
Location: Mesa, Arizona
Posts: 3,897
Thanks: 5
Thanked 30 Times in 30 Posts
Send a message via ICQ to silicon212
Re: 8.5 rear end

Just to add to the above - the '94-'96 9C1 Caprice will generally have the 3.08 ratio axle, but this will also have disc brakes vs. the car you have (drum brakes).
__________________
1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1!
2005 Crown Vic P71 - former AZ DPS - 4.6 liters of pure creamy slothness!
1967 El Camino L79/M20 old school asphalt raper

Remember - a government that is strong enough to give you everything you need, is also strong enough to take everything you have.
silicon212 is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums .com Car Chat > Chevrolet > Caprice

Thread Tools

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



All times are GMT -5. The time now is 09:06 PM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts