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Changing Speedo Gear

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Old Jul 5, 2005 | 09:55 PM
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klumb15's Avatar
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From: Menominee MI
Changing Speedo Gear

how much of a B!tch is this...i went from 2.73's to 3.73's, and the thing is pretty outta whack...it says like 40 when i'm doing 25-30...i had my tranny built professionally, but one thing i forgot to tell them is to change the speedo gear ....i would just like to know whats all involved in changing it, and how much of a pain is it...
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Old Jul 5, 2005 | 09:59 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
https://www.thirdgen.org/newdesign/t...eedogear.shtml
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Old Jul 5, 2005 | 10:03 PM
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thats a project and a half
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Old Jul 5, 2005 | 10:10 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
It's pretty trivial actually.
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Old Jul 5, 2005 | 10:41 PM
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From: Oak Harbor, WA
Car: 1990 IROC-Z
Engine: 383 HSR
Transmission: 700R4
Axle/Gears: 3.70
It's not bad at all, took me all of an hour to do mine. Check this link out: http://sethirdgen.org/vss.htm

The other most useful "tip" I got was to drop the drive gear in a coffee cup filled with water, microwave it (expansion) then drive it on. It goes on sooo much easier.
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Old Jul 6, 2005 | 10:10 PM
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From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
The drive gear can be a tad tricky. Not bad, but it's a pain without a lift.

The coffee cup trick sounds awesome. I should done that!
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Old Jul 23, 2005 | 08:24 AM
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From: jacksonville, fla
Car: 1987 camaro & 70 mustang
Engine: 2.8l & built 351C
Transmission: borg warner T-5
a pot of boiling water should work too, as long as it is suspended and not touching the bottom. any kind of heat will help with this. if that doesn't help much, cool off the shaft with some ice or compressed c02.
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