Speedo drive

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Gambit Trans-Am
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Speedo drive

Post by Gambit Trans-Am » Mon Nov 26, 2012 8:22 pm

Hello guys, my first issue with my 3rd gen, my speedo has stopped working. If I take the cable off the trans, the speedo works while spinning the cable end. but it doesn't work if connected to the drive. there is movement in the drive, but I am on expert in GM trans lol. could it just be the drive gear has gone south or could it be the drive gear on the shaft ? if so what's the easy fix :pray: thanks Paul
if it leaves black marks,smells bad uses petrol and gets hot it's working rightImage

SUPERCHARGEDGTA

Re: Speedo drive

Post by SUPERCHARGEDGTA » Mon Nov 26, 2012 10:30 pm

probably (and hopefuly) just the cable drive gear
just undo it and pull it out and have a look
if its the drive gear on the output shaft its a bit harder to change but as there is no speedo movement then its probably not it

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Gambit Trans-Am
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Posts: 23
Joined: Sat Nov 24, 2012 3:49 pm
Year: 1982
Model: Firebird Trans-Am
Engine: 383
Name: Paul
Location: South Wales
Location: Wales
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Re: Speedo drive

Post by Gambit Trans-Am » Tue Nov 27, 2012 10:11 am

SUPERCHARGEDGTA wrote:probably (and hopefuly) just the cable drive gear
just undo it and pull it out and have a look
if its the drive gear on the output shaft its a bit harder to change but as there is no speedo movement then its probably not it

Thank you once again matey, Can you tell me what drive gear to get for my diff ? I have a TH200 with 3,42-1 gears. I understand that there are several colours to choose from lol cheers Paul
if it leaves black marks,smells bad uses petrol and gets hot it's working rightImage

SUPERCHARGEDGTA

Re: Speedo drive

Post by SUPERCHARGEDGTA » Tue Nov 27, 2012 12:09 pm

best way is pull it out and look, at least you know it matches the speedo then

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banker
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Re: Speedo drive

Post by banker » Tue Nov 27, 2012 8:13 pm

You can also try this link, it's what i used when i changed my axle to a different ratio

http://www.thirdgen.org/techboard/trans ... meter.html
Membership no: 20184 James Little C Image
With an official 325 horse power and 405 lbs of torque

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