rear end ratio woes
Thread Starter
Member
Joined: Aug 2009
Posts: 113
Likes: 0
From: Las Vegas, NV
Car: 92' Formula T-Top
Engine: L98 With Custom CAI
Transmission: BUILT 700R4 with B&M Mods
Axle/Gears: 3.23
rear end ratio woes
im at a point to just pull the rear end cover.... i had an 82 firebird se that i took out the crappy 200c out of and replaced with a 700r4 and i still have a 91 camaro rs both cars would get about 70-75 mph at around 2000 rpm the 82 had diff then stock tires .... in the new addition to my f body fam is a 92 formula and about 62 mph in o/d locked up im at 2000 rpm the rpo code says that i have 3.23 gears im running stock 245-50-16 tires and the speedometer is correct as i got a ticket for 87 and i was doin just that lol... is that correct does anyone else have 3.23 gears that can relate to that prm range or does it sound more like 3.73's in there
here are the rear end codes as i found on the sticker
gu5
g80
here are the rear end codes as i found on the sticker
gu5
g80
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: rear end ratio woes
GU5 = 3.23 Approx RPM's at 70, 2133
G80 = limited slip
More info in the following link:
https://www.thirdgen.org/forums/tran...-10-bolts.html
JamesC
G80 = limited slip
More info in the following link:
https://www.thirdgen.org/forums/tran...-10-bolts.html
JamesC
Last edited by JamesC; Sep 7, 2009 at 07:03 AM.
Supreme Member
iTrader: (2)
Joined: Dec 2005
Posts: 1,739
Likes: 4
From: Beaufort South Carolina
Car: 1983 Camaro Z/28
Engine: LU5 305 CFI
Transmission: 700R4
Axle/Gears: J65/G80/G92-3.23
Re: rear end ratio woes
As JamesC pointed out it sounds like you're speedo is in the right range. I have 3.23s on my '83 Z28 and my speedo registers about the same. There were codes stamped into the right axle tube (diff side about center) that will show ratio codes and build date - if they are still readable.
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Joined: Mar 2001
Posts: 14,298
Likes: 197
From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: rear end ratio woes
@70 Mph... With a 700R4 (4L60)
My 2.73 = 1750 RPM - 87 Formula
My 3.73 = 2250 RPM - 89 Formula 350
My 3.27 = 2000 RPM - 87 Formula
Of course this is from my observations... My Gage may not be exact...
hope it helps.
John
My 2.73 = 1750 RPM - 87 Formula
My 3.73 = 2250 RPM - 89 Formula 350
My 3.27 = 2000 RPM - 87 Formula
Of course this is from my observations... My Gage may not be exact...
hope it helps.
John
Supreme Member
Joined: Mar 2002
Posts: 4,812
Likes: 0
From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
Re: rear end ratio woes
damn.. seems like my 82 t/a was the only 82 ever made without 3.23
it was 200c trans as well.
2.73 sucks.
not fair!
i had to stick a 2400 stall converter in the th350 i put under it to help make up for the crap axle ratio
hmm..
it was 200c trans as well.
2.73 sucks.
not fair!
i had to stick a 2400 stall converter in the th350 i put under it to help make up for the crap axle ratio
hmm..
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