T5 speedo gear question
Thread Starter
Joined: Nov 1999
Posts: 1,790
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From: Monroe,NC
Car: 90 Formula
Engine: 305
Transmission: 700R4
Axle/Gears: 9 bolt/3.27
T5 speedo gear question
How far off would the speedometer be with a drive and driven gear combo of7/19 for 3.45 be with 3.27 rear gears? I've been told that each tooth on the driven gear over is worth about 2-3 mph.
Joined: Sep 2005
Posts: 27,918
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: T5 speedo gear question
It will be about 3.45/3.27 - 1 off... about 5.5% high. At that rate, it will be about 1 mph high at 18 mph actual (will read 19 when going 18), 2 mph high at about 36 mph, 3 mph high at about 54 mph, 4 mph high at 72 mph, etc.
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