Hey Guys, BEST fourth Gen Rearend To get in Your opinion...
Hey Guys, BEST fourth Gen Rearend To get in Your opinion...
ok, as you can see ive been talking to you guys about this for a while, so now im getting closer to it....
ok, im looking at them,
def want best gear, and i see that 3.42 is it..
and its my daily driver.
now i HEARD that camaros have the posi? and then what, firebirds dont????
thats messed up...
if i was to get a 99 (i have a 99 center console) how much should i pay, ive seen prices, but without getting ripped off.
i see the NW9 code sometimes...
thanx guys. and Where is the Prop valve on a fourth so i can yank it.
THANX!
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91 FireBird 305 V-8
Edelbrock Catback, Custom Alarm. Fourth Gen Console. i have six cupholders. all for starbucks!
Go|)Created The Earth, And Then Turned Up The Bass.
Here's My Audio Install!
"Honda's FOR ME TO POOP ON!" -Triumph...
ok, im looking at them,
def want best gear, and i see that 3.42 is it..
and its my daily driver.
now i HEARD that camaros have the posi? and then what, firebirds dont????
thats messed up...
if i was to get a 99 (i have a 99 center console) how much should i pay, ive seen prices, but without getting ripped off.
i see the NW9 code sometimes...
thanx guys. and Where is the Prop valve on a fourth so i can yank it.
THANX!
------------------
91 FireBird 305 V-8
Edelbrock Catback, Custom Alarm. Fourth Gen Console. i have six cupholders. all for starbucks!

Go|)Created The Earth, And Then Turned Up The Bass.
Here's My Audio Install!
"Honda's FOR ME TO POOP ON!" -Triumph... Supreme Member
Joined: Mar 2001
Posts: 2,047
Likes: 0
From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
Any Z28, Formula, or Trans Am will have a posi rear end. The RPO for a positraction or Limited Slip Differential is G80. Yes, the 3.42 is the steepest gear you will find in a fourth gen rear axle. Any fourth gen F-body from 93 to present will have the option of having the 3.42 gear if it has the Manual 6 speed. In my experience, you will not need a different proportioning valve if your car has four wheel disc already. Otherwise you will likely need one (if you have drum rear currently). I also doubt that the fourth gen proportioning valve will work on a third gen. The other issue with going from rear drum to rear disc is the size of the master cylinder as the calipers in the rear will hold a lot more fluid when the pads wear down and the pistons are the farthest out of the calipers. The reservoir on a four wheel disc setup is larger to accomodate this.
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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA
The Minnesota F-body Club
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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA
The Minnesota F-body Club
Supreme Member
Joined: Mar 2001
Posts: 2,047
Likes: 0
From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
Also, for a price range, I wouldn't pay over $400 for a complete rear (disc to disc). Check out www.speedautomotive.com for reasonably priced fourth gen rear axles.
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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA
The Minnesota F-body Club
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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA
The Minnesota F-body Club
'93 6 speed cars have 3.23 gears, '94-'02 6 speed cars have 3.42 gears. '99+ V8 cars have the Torsen differential. They won't take quite as much shock as the auburn, but the clutches don't wear out like the auburn. '98 rear ends will have the bigger rear disk brakes. If I were making the swap, I would look for a '99+ axle from a 6 speed car.
-Chuck
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87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association
-Chuck
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87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association
ya, i have drum in the rear and then disk fron of course, so i would actually get a prop valve from an Fbody,
how much do they run for?
------------------
91 FireBird 305 V-8
Edelbrock Catback, Custom Alarm. Fourth Gen Console. i have six cupholders. all for starbucks!
Go|)Created The Earth, And Then Turned Up The Bass.
Here's My Audio Install!
"Honda's FOR ME TO POOP ON!" -Triumph...
how much do they run for?
------------------
91 FireBird 305 V-8
Edelbrock Catback, Custom Alarm. Fourth Gen Console. i have six cupholders. all for starbucks!

Go|)Created The Earth, And Then Turned Up The Bass.
Here's My Audio Install!
"Honda's FOR ME TO POOP ON!" -Triumph... Thread
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