speed O calibration
Thread Starter
Junior Member
Joined: Apr 2008
Posts: 27
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From: IA
Car: 92 RS
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.27 4 wheel disc
speed O calibration
I have a 92 RS that I replaced the rear end I installed a BW 9 bolt with 3.27
gears I think the stock rear end had 2.73 do I need to change any thing in the trans to correct the speed O
Thanks
gears I think the stock rear end had 2.73 do I need to change any thing in the trans to correct the speed O
Thanks
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: speed O calibration
Yes, you need to change the drive gear and driven gear in the tailshaft of the transmission.
You can
this forum for "3.23 speedo" or "3.27 speedo" and find the correct gear sizes and probably the part numbers too.
You can
this forum for "3.23 speedo" or "3.27 speedo" and find the correct gear sizes and probably the part numbers too. Thread Starter
Junior Member
Joined: Apr 2008
Posts: 27
Likes: 0
From: IA
Car: 92 RS
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.27 4 wheel disc
Re: speed O calibration
Thanks Kevin91Z
I got a chart from my local cheye dealer and all I need to change is the driven to a 45 my drive will stay the same its a 17
I got a chart from my local cheye dealer and all I need to change is the driven to a 45 my drive will stay the same its a 17
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