LS1TECH - Camaro and Firebird Forum Discussion

Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

'01 SS 'Vert with GU5 3.23 but '02 RS with GU6 3.42 - WHY?!

Thread Tools
 
Search this Thread
 
Old 10-26-2010, 08:43 PM
  #1  
TECH Addict
Thread Starter
iTrader: (2)
 
libertyforall1776's Avatar
 
Join Date: May 2007
Location: IL
Posts: 2,129
Likes: 0
Received 5 Likes on 5 Posts

Question '01 SS 'Vert with GU5 3.23 but '02 RS with GU6 3.42 - WHY?!
I don't get it, why does my '01 SS 'Vert come with RPO GU5 3.23 gears but my '02 RS came with GU6 3.42 - anyone know WHY?!

Seems odd the higher trim level car came with a lesser gear ratio.

TIA!
libertyforall1776 is offline  
Reply Like
Old 10-27-2010, 01:11 AM
  #2  
TECH Senior Member
iTrader: (96)
 
01ssreda4's Avatar
 
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 24,241
Likes: 0
Received 81 Likes on 72 Posts

Default
Auto Z28s got 2.73 or 3.23
All Auto SSs got 3.23
All Z and SS M6s got 3.42s.

If your RS is a V6 then I dunno what they came with. The auto really doesn't need a lot of gear to get moving bc 1st gear is steep in the 4l60e.
01ssreda4 is offline  
Reply Like
Old 10-27-2010, 07:10 AM
  #3  
TECH Veteran
iTrader: (4)
 
FirstYrLS1Z's Avatar
 
Join Date: Aug 2004
Location: Euclid,Ohio
Posts: 4,175
Received 136 Likes on 120 Posts
LS1Tech 20 Year Member
Default
the RS Y87 V6 performance package for automatics came with 3.42 gears.
why GM thought 3.42s' were necessary over the 3.23s',only GM can answer.
most standard V6s' came with 3.08.
FirstYrLS1Z is offline  
Reply Like
Old 10-27-2010, 07:38 AM
  #4  
TECH Senior Member
iTrader: (71)
 
lemons12's Avatar
 
Join Date: Jul 2007
Location: Winchester, TN
Posts: 11,088
Likes: 0
Received 2 Likes on 2 Posts

Default
Steeper year in the 6 give it more pep. Higher gear in he v8 give it whay it needs still but helps wih gas.
lemons12 is offline  
Reply Like
Old 10-27-2010, 01:02 PM
  #5  
TECH Addict
Thread Starter
iTrader: (2)
 
libertyforall1776's Avatar
 
Join Date: May 2007
Location: IL
Posts: 2,129
Likes: 0
Received 5 Likes on 5 Posts

Post
Oddly my RS is not a Y87, nor does it have the G80 (LSD RPO code)...

I just found it really odd my 3.8L has the better gear than my 5.7L Vert.! -- GM seems to make odd choices.

Originally Posted by FirstYrLS1Z
the RS Y87 V6 performance package for automatics came with 3.42 gears.
why GM thought 3.42s' were necessary over the 3.23s',only GM can answer.
most standard V6s' came with 3.08.
libertyforall1776 is offline  
Reply Like
Old 10-27-2010, 01:05 PM
  #6  
TECH Addict
Thread Starter
iTrader: (2)
 
libertyforall1776's Avatar
 
Join Date: May 2007
Location: IL
Posts: 2,129
Likes: 0
Received 5 Likes on 5 Posts

Question
So will I notice the 3.23 -> 3.42 change much in my SS, let's say seat of the pants? Just a tad less MPG with the newer gear then?

Originally Posted by 01ssreda4
Auto Z28s got 2.73 or 3.23
All Auto SSs got 3.23
All Z and SS M6s got 3.42s.

If your RS is a V6 then I dunno what they came with. The auto really doesn't need a lot of gear to get moving bc 1st gear is steep in the 4l60e.
libertyforall1776 is offline  
Reply Like
Tags
Back to Subforum
Gears & Axles
View Next Unread
what rearend to buy




Advanced Search
Quick Reply: '01 SS 'Vert with GU5 3.23 but '02 RS with GU6 3.42 - WHY?!


Reply Closed Thread Share

All times are GMT -5. The time now is 03:16 AM.