Converting to posi... rear end and gear ratio? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-21-2007, 04:57 PM
Registered User
 
Join Date: Jan 2007
Location: florida
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Converting to posi... rear end and gear ratio?

I have a 91 Camaro RS with a 10-bolt non-posi rear end. I can get a worm gear and carrier etc. out of a 91 IROC for about $75. but it's 2.83 gear ratio... if I'm going to do the swap, should I look for a better gear ratio like 3.08? This is basically just a street car that I want to give more power and traction.

Another thing is, How much power can a 10 bolt handle? I'm going to be swapping the motor at some point, and have considered going with an LS1 and 4L60E tranny... will the 10 bolt be able to handle 300-350hp? If not, what rear ends should I be looking at? A 9 bolt from an earlier year camaro?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-21-2007, 06:36 PM
xntrik's Avatar
Save a horse, Ride a Cowboy.
 
Last photo:
Join Date: Jul 2005
Location: Arkansas
Posts: 5,131
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by Street Rod
I have a 91 Camaro RS with a 10-bolt non-posi rear end. I can get a worm gear and carrier etc. out of a 91 IROC for about $75. but it's 2.83 gear ratio... if I'm going to do the swap, should I look for a better gear ratio like 3.08? This is basically just a street car that I want to give more power and traction.

Another thing is, How much power can a 10 bolt handle? I'm going to be swapping the motor at some point, and have considered going with an LS1 and 4L60E tranny... will the 10 bolt be able to handle 300-350hp? If not, what rear ends should I be looking at? A 9 bolt from an earlier year camaro?

If your Camaro is a V8.....I'd stick a posi in your existing housing. It will take 350 hp without a sweat unless you get really abusive. I'd go for a 3.73 gear since you do have an overdrive transmission. Properly maintained 10 bolts behind an automatic can run 12s without problems.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-21-2007, 07:18 PM
Registered User
 
Last photo:
Join Date: Nov 2006
Location: Woodstock
Posts: 900
Wiki Edits: 0

Thanks: 2
Thanked 73 Times in 66 Posts
The 10 bolts in the 3rd Gen's are 7.5" rears and the 4th Gens are 7.625". IIRC. Both are interchangeable.

A 9 bolt Aussie rearend would be stronger but gear ratios are limited.


Grab that IROC rear esp. if it is a limited slip. You will need BOTH wheels providing traction with an LS1.

peace
Hog
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-21-2007, 07:31 PM
Registered User
 
Join Date: Jan 2007
Location: florida
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I'm almost certain I'm going to get this IROC rear because it's already pulled and they're not the easiest thing to come across. I think it might be 2.93 or 2.73 though, not 2.83... but I would like a 3.73 for the improved acceleration.
EDIT: well I found a 3.73, only this one is around $150... I guess the 3.73 is MUCH more highly sought after...

Also, I'm not sure if mine has 26 spline or 28 spline axles?... I guess I need to find that out before anything... I've read that they used 26 spline exclusively in camaros up till 89, and then went to 28 spline, but that might only be for the Z28 and IROC's that came with posi, I'm think my weakling nonposi rearend might still be the 26 spline??? in which case i would have to get new axles as well... Orrrr, get a 26 spline posi locker and gears from a 82-89 camaro?

Last edited by Street Rod; 01-21-2007 at 08:50 PM.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
this is a saver.... GM build codes TooMany2count General Rodding Tech 24 11-23-2009 09:36 AM
Posi Rear end gear oil problem stinky jinx Transmission - Rearend 16 05-14-2006 02:02 PM
VIN # and rear end gear ratio olds79 Transmission - Rearend 1 11-24-2005 08:17 PM
What is the gear ratio for a GM rear end? jpd37 Transmission - Rearend 6 02-23-2004 12:52 PM
1972 Olds rear end gear ratio jpd37 Transmission - Rearend 4 09-26-2003 03:59 PM


All times are GMT -6. The time now is 09:07 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.