Is there another source other than dealership to get an 8-teeth speedometer gear. Went to GM, and the part has been discontinued (P/N 8628839). Can you guys recomment another source? Thanks for the help.

 

oops! (recommend). i forgot to add, the T5 (WC) is off of an '91 firebird.

 

What is your rear end ratio? Most of the usual ones use a 7-tooth blue gear.

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"So many Mustangs, so little time..."
ICON Motorsports

 

It's a 3.23 - i'm running 255-50/16's (rear). I already have the 20-teeth gear. Thanks RB!

 

The correct gears for a 3.23 with tires as close to stock diameter as those are would be a 7 tooth blue drive gear and a 18 tooth red driven gear IIRC. It might be a 19 tooth, but I think that's the right combo for 3.42s. I don't have the part #s.

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"So many Mustangs, so little time..."
ICON Motorsports

 

thanks RB83L69

 

Its a 7 tooth and an 18 tooth for 3.23 or 3.27 rear end and a T5. However, GM discontinued the 18 tooth gear too!

Try www.hanlonmotorsports.com or www.gearzone.net


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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

If you do happen to find a 8T drive, you would need a 21T driven with it. But I think even that combo is discontinued.

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1989 IROC-Z 5.7L

 

That BITES!!!!

Look in junkyards in 6-cylinder transmissions. Lots of them came with gears like that, that might be the best source if you can't get them from the dealer.

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"So many Mustangs, so little time..."
ICON Motorsports