What size differential do I have?? - Camaro Zone - Camaro Forums and News

Go Back   Camaro Zone - Camaro Forums and News > Camaro & Firebird Tech Forums > General Camaro & Firebird Tech

Join Camaro Zone Today
Reply
 
LinkBack Thread Tools
 
Old 04-20-2013, 11:22 PM   #1
Member
Feedback Score: 0 reviews
 
Join Date: Jan 2013
Location: Los Angeles
Posts: 101
Thanks: 4
Thanked 0 Times in 0 Posts
What size differential do I have??

I have a 1987 Z28 with a 305 and 4 speed automatic trani
It is carburated and I want to know what size rearend I might have since I want to put a posi spool
__________________

__________________
CoolDansta is offline   Reply With Quote
Old 04-20-2013, 11:38 PM   #2
Veteran Member
Feedback Score: 0 reviews
 
cammy's Avatar
 
Join Date: Jan 2010
Location: Hinton, OK
Posts: 2,728
Thanks: 4
Thanked 43 Times in 36 Posts
Garage
Check RPO coded
__________________

__________________
cammy is online now   Reply With Quote
Old 04-20-2013, 11:47 PM   #3
Veteran Member
Feedback Score: 0 reviews
 
Camarojuana's Avatar
 
Join Date: Jan 2012
Location: Los Angeles CA
Posts: 4,423
Thanks: 26
Thanked 52 Times in 45 Posts
You probably got a 2.73.

You have a 87 Z28 thats carbureted? I could be wrong but didn't all Z28s in 87 get TPI? I know 85-86 got the LG4 standard and LB9 optional, but I thought LB9 was standard in the Z by 87.
__________________
I was Chevy born and Chevy bred and when I die I'll be Chevy dead
Camarojuana is offline   Reply With Quote
Old 04-20-2013, 11:51 PM   #4
Member
Feedback Score: 0 reviews
 
Join Date: Jan 2013
Location: Los Angeles
Posts: 101
Thanks: 4
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Camarojuana View Post
You probably got a 2.73.

You have a 87 Z28 thats carbureted? I could be wrong but didn't all Z28s in 87 get TPI? I know 85-86 got the LG4 standard and LB9 optional, but I thought LB9 was standard in the Z by 87.
Actually I don't know because the engine I have is a 1995-2000
I ran the casting numbers and that is what came up the valve covers bolt on the center of the heads not on the edges someone swapped the engine from 305-350. But I can give you the vin and from there we can see what I have
__________________
CoolDansta is offline   Reply With Quote
Old 04-20-2013, 11:54 PM   #5
Veteran Member
Feedback Score: 0 reviews
 
Camarojuana's Avatar
 
Join Date: Jan 2012
Location: Los Angeles CA
Posts: 4,423
Thanks: 26
Thanked 52 Times in 45 Posts
Quote:
Originally Posted by CoolDansta View Post

I can give you the vin and from there we can see what I have
Sounds like a plan, do it dude.
__________________
I was Chevy born and Chevy bred and when I die I'll be Chevy dead
Camarojuana is offline   Reply With Quote
Old 04-21-2013, 12:06 AM   #6
Veteran Member
Feedback Score: 4 reviews
 
Michaelrulaz's Avatar
 
Join Date: Jan 2012
Location: DeBary, Florida, United States
Posts: 4,844
Thanks: 66
Thanked 118 Times in 101 Posts
it might be an lt but wouldn't explain the carb. I'm interested
__________________
Current Vehicles:
97 Camaro RS
85 Camaro IROC-Z
Kawasaki Ninja500
150cc Scooter


Quote:
Originally Posted by Camarojuana View Post
oh! And some tacky mother****er with a green 05 or 06 V6 Stang on some 22's" on the corner of my block. **** that dude.
Michaelrulaz is offline   Reply With Quote
Old 04-21-2013, 12:22 AM   #7
Member
Feedback Score: 0 reviews
 
Join Date: Jan 2013
Location: Los Angeles
Posts: 101
Thanks: 4
Thanked 0 Times in 0 Posts
Yeah it's weird my Camaro had work done before I got it it bought I had a 305 but I looked behind the block and it says 5.7 so it was weird so I ran the caring numbers online and it says that my engine was made from 1995-2000 but it still doesn't explain the carburetor unless someone made it carbureted and took off the fuel injection.
It an electric carburetor a quadrant rochester
__________________
CoolDansta is offline   Reply With Quote
Old 04-21-2013, 01:02 AM   #8
Veteran Member
Feedback Score: 0 reviews
 
1987 IROC Z28's Avatar
 
Join Date: Mar 2012
Location: Mukilteo, WA
Posts: 1,685
Thanks: 24
Thanked 12 Times in 12 Posts
Garage
Quote:
Originally Posted by CoolDansta View Post
I have a 1987 Z28 with a 305 and 4 speed automatic trani
It is carburated and I want to know what size rearend I might have since I want to put a posi spool
If they are original parts check the RPO codes located in the center console. Use this site to check what they mean.

http://www.prophetsofmadness.com/iro...gures.htm#1987 Factory Option RPO (Regular Production Order) Numbers & Costs

I recently wondered what my ratio was too. I found out i have 3.45 borg warner axle. The site tells you from the code on the differential cover what you have.
__________________

Last edited by 1987 IROC Z28; 04-21-2013 at 01:04 AM.
1987 IROC Z28 is offline   Reply With Quote
Old 04-21-2013, 10:47 AM   #9
The "Senior" Member
Feedback Score: 1 reviews
 
NavyVet's Avatar
 
Join Date: Jan 2010
Location: Jacksonville, FL
Posts: 14,397
Thanks: 32
Thanked 836 Times in 763 Posts
Garage
Quote:
Originally Posted by CoolDansta View Post
I have a 1987 Z28 with a 305 and 4 speed automatic trani
It is carburated and I want to know what size rearend I might have since I want to put a posi spool
If it's a Z28 it should already be a posi.
__________________

96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 188k miles and counting.
Total engine rebuild at 187,020 miles.
AIR delete. Bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs..
lift I .500 E .510 duration I 266 E 276
NavyVet is offline   Reply With Quote
Old 04-21-2013, 11:52 AM   #10
CZ's Audio Yoda
Feedback Score: 1 reviews
 
Ercmann's Avatar
 
Join Date: Nov 2011
Location: River Valley
Posts: 7,517
Thanks: 32
Thanked 294 Times in 276 Posts
Garage
Hmmmmmmm ... Very weird indeed, especially sine LS1's replaced the TL1's in 98. How can it be a 95-2000?
__________________

2001 Camaro SS LS1
6 Speed Manual
"Concert Hall On Wheels"
"It's better to have it and not need it, than to need it and not have it"
http://www.camarozone.com/forum/f18/...thread-178452/
Ercmann is offline   Reply With Quote
Old 04-21-2013, 12:01 PM   #11
The "Senior" Member
Feedback Score: 1 reviews
 
NavyVet's Avatar
 
Join Date: Jan 2010
Location: Jacksonville, FL
Posts: 14,397
Thanks: 32
Thanked 836 Times in 763 Posts
Garage
I want to see a picture of the "carb" from directly above, with the air cleaner off
__________________

96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 188k miles and counting.
Total engine rebuild at 187,020 miles.
AIR delete. Bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs..
lift I .500 E .510 duration I 266 E 276
NavyVet is offline   Reply With Quote
Old 04-21-2013, 12:10 PM   #12
Veteran Member
Feedback Score: 0 reviews
 
Camarojuana's Avatar
 
Join Date: Jan 2012
Location: Los Angeles CA
Posts: 4,423
Thanks: 26
Thanked 52 Times in 45 Posts
Quote:
Originally Posted by Ercmann View Post
Hmmmmmmm ... Very weird indeed, especially sine LS1's replaced the TL1's in 98. How can it be a 95-2000?
Its probably a 305 or 350 tbi engine from a 95-00 pickup or SUV. The LSx style 4.8 and 5.3 didn't go into the pickups till 99 with the new body designed Silverados and Sierras. All the SUVs didn't get the new bodies and engines till 2001. So that kinda explains the years.
__________________
I was Chevy born and Chevy bred and when I die I'll be Chevy dead
Camarojuana is offline   Reply With Quote
Old 04-21-2013, 12:13 PM   #13
CZ's Audio Yoda
Feedback Score: 1 reviews
 
Ercmann's Avatar
 
Join Date: Nov 2011
Location: River Valley
Posts: 7,517
Thanks: 32
Thanked 294 Times in 276 Posts
Garage
Quote:
Originally Posted by Camarojuana View Post

Its probably a 305 or 350 tbi engine from a 95-00 pickup or SUV. The LSx style 4.8 and 5.3 didn't go into the pickups till 99 with the new body designed Silverados and Sierras. All the SUVs didn't get the new bodies and engines till 2001. So that kinda explains the years.
Aaaaahhhhhhhhh!!! Got it !! That explains it. He did say the block is stamped 5.7, so we know its a 350.
__________________

2001 Camaro SS LS1
6 Speed Manual
"Concert Hall On Wheels"
"It's better to have it and not need it, than to need it and not have it"
http://www.camarozone.com/forum/f18/...thread-178452/
Ercmann is offline   Reply With Quote
Old 04-21-2013, 12:25 PM   #14
Veteran Member
Feedback Score: 0 reviews
 
Camarojuana's Avatar
 
Join Date: Jan 2012
Location: Los Angeles CA
Posts: 4,423
Thanks: 26
Thanked 52 Times in 45 Posts
At least that's my educated guess. Thats the only thing that came to me with those years and small block chevy. And I mentioned 305 and 350 because first in the beginning of the thread he said he had a carb 305 and later on said he checked the back of the block and saw 5.7, so instead of questioning it, I just busted an "and/or".
__________________
I was Chevy born and Chevy bred and when I die I'll be Chevy dead
Camarojuana is offline   Reply With Quote
Old 04-21-2013, 04:38 PM   #15
Junior Member
Feedback Score: 0 reviews
 
minalga's Avatar
 
Join Date: Apr 2012
Location: West Springfield Massachuettes
Posts: 42
Thanks: 1
Thanked 0 Times in 0 Posts
Garage
Quote:
Originally Posted by NavyVet View Post

If it's a Z28 it should already be a posi.
I have a 84 z28 that's not posi. I know a couple who has a z with no posi
__________________
minalga is offline   Reply With Quote
Old 04-21-2013, 05:42 PM   #16
Veteran Member
Feedback Score: 0 reviews
 
1987 IROC Z28's Avatar
 
Join Date: Mar 2012
Location: Mukilteo, WA
Posts: 1,685
Thanks: 24
Thanked 12 Times in 12 Posts
Garage
Quote:
Originally Posted by CoolDansta View Post
Yeah it's weird my Camaro had work done before I got it it bought I had a 305 but I looked behind the block and it says 5.7 so it was weird so I ran the caring numbers online and it says that my engine was made from 1995-2000 but it still doesn't explain the carburetor unless someone made it carbureted and took off the fuel injection.
It an electric carburetor a quadrant rochester
Is it a crate motor?
__________________
1987 IROC Z28 is offline   Reply With Quote
Old 04-21-2013, 05:49 PM   #17
Veteran Member
Feedback Score: 0 reviews
 
Camarojuana's Avatar
 
Join Date: Jan 2012
Location: Los Angeles CA
Posts: 4,423
Thanks: 26
Thanked 52 Times in 45 Posts
Quote:
Originally Posted by 1987 IROC Z28 View Post

Is it a crate motor?
I thought about that too after I posted earlier. It has to be either a crate like you said or a truck motor engine like I said earlier. That is if what dude said about it being a 95-00 engine is accurate.
__________________
I was Chevy born and Chevy bred and when I die I'll be Chevy dead
Camarojuana is offline   Reply With Quote
Old 04-21-2013, 05:52 PM   #18
Veteran Member
Feedback Score: 0 reviews
 
1987 IROC Z28's Avatar
 
Join Date: Mar 2012
Location: Mukilteo, WA
Posts: 1,685
Thanks: 24
Thanked 12 Times in 12 Posts
Garage
Quote:
Originally Posted by Camarojuana View Post

I thought about that too after I posted earlier. It has to be either a crate like you said or a truck motor engine like I said earlier. That is if what dude said about it being a 95-00 engine is accurate.
Yea you're right about that.

When you say its 95-00 do you mean that's when it was made, rebuilt, bought?
__________________
1987 IROC Z28 is offline   Reply With Quote
Old 04-21-2013, 05:53 PM   #19
Veteran Member
Feedback Score: 4 reviews
 
Michaelrulaz's Avatar
 
Join Date: Jan 2012
Location: DeBary, Florida, United States
Posts: 4,844
Thanks: 66
Thanked 118 Times in 101 Posts
Quote:
Originally Posted by 1987 IROC Z28 View Post

Yea you're right about that.

When you say its 95-00 do you mean that's when it was made, rebuilt, bought?
sense its vin stamped has to be built.
__________________
Current Vehicles:
97 Camaro RS
85 Camaro IROC-Z
Kawasaki Ninja500
150cc Scooter


Quote:
Originally Posted by Camarojuana View Post
oh! And some tacky mother****er with a green 05 or 06 V6 Stang on some 22's" on the corner of my block. **** that dude.
Michaelrulaz is offline   Reply With Quote
Old 05-07-2013, 10:36 PM   #20
Member
Feedback Score: 0 reviews
 
Join Date: Jan 2013
Location: Los Angeles
Posts: 101
Thanks: 4
Thanked 0 Times in 0 Posts
Honestly I don't know if it was a crate motor or not the guy I bought it from thought it was a 305 but then I bought it and noticed it was a 350 I noticed that the valve cover bolts were in the center it has. 4barrel quadrajet
__________________

__________________
CoolDansta is offline   Reply With Quote
Reply

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
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Differential will84firebirdtransam 3rd Gen (1982-92) Camaro and Firebird Tech 3 08-25-2012 02:48 PM
differential ohno itstheCoPz 4th Gen (1993-97) Camaro and Firebird Tech 16 08-21-2012 03:49 PM
Valve size to bore size JacobLS1 4th Gen (1998-02) Camaro and Firebird Tech 7 11-14-2010 01:30 AM
looking into a new differential Tin_Man V6 Camaro and Firebird Tech 7 03-01-2009 04:04 AM
.....differential..... Darkside Motorsports General Discussion 18 02-24-2009 03:02 PM




Powered by vBadvanced CMPS v3.2.3

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 08:16 AM.
Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
Copyright © CamaroZone.com

Camaro News Delivered to your Email!

Get the latest Camaro news straight to your inbox!

unsusbcribe at anytime with one click

Close [X]