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SmokinVette.com Forums : Corvette Forums : C3 Corvette Forums : C3 Tech & Performance : 370 gears
C3 Tech & Performance

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Old 12-25-2012, 01:43 PM   #1
kenny k
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Default 370 gears

I replaced my 302 rear and put in 373 gears . I was reading a post that talked about changing a plastic gear in the speedo, to get an accurate reading on mph. Is this a diffulcult proceger ?
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Old 12-25-2012, 05:24 PM   #2
david78
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Quote:
Originally Posted by kenny k View Post
I replaced my 302 rear and put in 373 gears . I was reading a post that talked about changing a plastic gear in the speedo, to get an accurate reading on mph. Is this a diffulcult proceger ?
WHAT TRANSMISSION?
year?
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Old 12-25-2012, 06:09 PM   #3
fishslayer143@yahoo.com
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you will need to match the drive gear and driven gear tooth counts to get an accurate speedometer reading. according to Rear Axle ratio and tire diameter ... the driven gear is easy, its inside where the cable attaches.. the drive gear requires removing the tail housing .neither are that difficult.. available from all the vendors....Dave, like the " Control " slogan

Last edited by fishslayer143@yahoo.com; 12-25-2012 at 06:14 PM.
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Old 12-25-2012, 09:03 PM   #4
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Dave, like the " Control " slogan
Thanks ( its a shame guns have a bad reputation when all they do is make me happy
especially my AR-15 :-D
Here are the steps to remove the drive gear and the driven gear
http://www.73-87.com/7387garage/drivetrain/spdgears.htm
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Old 12-26-2012, 08:20 AM   #5
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1971 corvette ,I picked up a 373 rear and replaced the 302 rear ,it has a munci 4 speed m21 or m20 can't recall but its the one with the lower first gear.Thanx k.k.
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Old 12-26-2012, 01:18 PM   #6
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Quote:
Originally Posted by kenny k View Post
1971 corvette ,I picked up a 373 rear and replaced the 302 rear ,it has a munci 4 speed m21 or m20 can't recall but its the one with the lower first gear.Thanx k.k.

Kenny, to correct your speedometer you'll need the correct nylon drive and driven gears that go into your transmission. PATC and TCI sells them and they're not expensive; usually around $11-$15 each. As the drive gear mounts on the transmission's output shaft you'll have to pull your tailhousing to replace it. E-mail me at sw82vette@yahoo.com and I'll give you all the information you'll need.................
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Old 12-26-2012, 04:35 PM   #7
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Thanks.k.k.
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