2.77-->3.27...Help with speedo gears??
Thread Starter
Joined: Aug 1999
Posts: 492
Likes: 0
From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
2.77-->3.27...Help with speedo gears??
Has anyone done this swap before?? I want to make sure I have the right driven and drive gears before I actually swap them out for my old ones. I called the dealership and got the parts and they gave me a red drive gear and a green driven gear.
How do I know if these will give me the correct ratio???
How do I know if these will give me the correct ratio???
Joined: Feb 2000
Posts: 1,855
Likes: 13
From: St. Augustine, FL
Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
When I pulled my 3.27, I thought it was the red gear and gray gear, but I'm not sure. I'll have to go home and look to be sure.
Joined: Jul 2003
Posts: 2,017
Likes: 13
From: Troup, Texas
Car: 1989 Camaro IROC-Z
Engine: ZZZ# 0607 of 1200 produced
Transmission: Pro-Built 700R4/Vig.2400
Axle/Gears: 3.27 BW 9 Bolt PBR Disc
I did the exact same swap and also need to know ASAP....
Supreme Member
iTrader: (7)
Joined: Mar 2001
Posts: 6,420
Likes: 5
From: Fort Mill, SC, USA
Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
www.700r4.com if you have an auto, I don't know what to tell the manual guys. Just click the links to get you to the speedo gear calculator here:
http://www.700r4.com/speedoCalc/speedocalc.shtml
It tells me for a 245/50-16 tire you need the 17 tooth drive and 43 tooth driven gears. I'll be doing the same swap soon.
Ed
http://www.700r4.com/speedoCalc/speedocalc.shtml
It tells me for a 245/50-16 tire you need the 17 tooth drive and 43 tooth driven gears. I'll be doing the same swap soon.
Ed
Senior Member
Joined: Mar 2003
Posts: 523
Likes: 0
From: Marion, Iowa
Car: 92 Camaro
Engine: ZZ4 Crate Engine w/Hot Cam
Transmission: Rebuilt 700R4 with Transgo and MW 3
Axle/Gears: 3.73 Eaton Posi
I did the same swap (2.73 -> 3.23) on an electronic speedo (92 camaro) and NOBODY could get it right.
700R4.com sent me the wrong gears and when i called them back they said they dont have what i want
My uncle owns a transmission shop and he couldn't even locate what I needed.
Now I plan on getting the unit from Dakota Digital that modifies the electrical signal to the speedo and/or computer. That way it's easier to change if you get tired of 3.23s and go higher.
700R4.com sent me the wrong gears and when i called them back they said they dont have what i want
My uncle owns a transmission shop and he couldn't even locate what I needed.
Now I plan on getting the unit from Dakota Digital that modifies the electrical signal to the speedo and/or computer. That way it's easier to change if you get tired of 3.23s and go higher.
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