speedo gears... are they all driven by grey 15 tooth?
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From: previously OKINAWA JAPAN,georgia, now new england
Car: 1989 IROC--1989 T/A
Engine: 5.7 TPI in both
Transmission: W/C T-5 in both
Axle/Gears: B/W 3.27 in both
speedo gears... are they all driven by grey 15 tooth?
i'm trying to get this all down into a Quick reference list. I have seen in 2 other posts that the 3.42 and 3.73 ratio rear use a 15 tooth grey drive gear. is this true? Also the driven gears are 41 (yellow) for 3.42, and 45 (lt blue) for 3.73 , GM codes.I was told by GM that i needed a 17 tooth (red) for the drive on the 3.73 
I don't know which is which but once i do my speedo will be on track and i will have a complete book of tranny codes speedo gear/rear ratio combinations for everyone. THNX TO ALL, THE SHAGGY IROC
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'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money
I don't know which is which but once i do my speedo will be on track and i will have a complete book of tranny codes speedo gear/rear ratio combinations for everyone. THNX TO ALL, THE SHAGGY IROC------------------
'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
The FAQ section on here lists a lot of the gears for automatics. We need one for the 5-speeds. 
------------------
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=-
------------------
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=-
Thread Starter
Senior Member
iTrader: (4)
Joined: Aug 1999
Posts: 629
Likes: 0
From: previously OKINAWA JAPAN,georgia, now new england
Car: 1989 IROC--1989 T/A
Engine: 5.7 TPI in both
Transmission: W/C T-5 in both
Axle/Gears: B/W 3.27 in both
kevin are you saying you need the p/n, and color for the 5 speed gears?
Thread Starter
Senior Member
iTrader: (4)
Joined: Aug 1999
Posts: 629
Likes: 0
From: previously OKINAWA JAPAN,georgia, now new england
Car: 1989 IROC--1989 T/A
Engine: 5.7 TPI in both
Transmission: W/C T-5 in both
Axle/Gears: B/W 3.27 in both
the drive gear is a purple 7 tooth, P/N 14071731, and the driven gear is a orange 21 tooth,P/N 14090582. The orange one was discontinued 2 years ago. It could be had with the sleeve P/N 14090594. Also disc. The purple is still available for 8.00 at the dealer. The other one THE SHAGGY IROC
------------------
'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money
THE SHAGGY IROC------------------
'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
<font face="Verdana, Arial" size="2">Originally posted by irocnroll89:
the drive gear is a purple 7 tooth, P/N 14071731, and the driven gear is a orange 21 tooth,P/N 14090582. The orange one was discontinued 2 years ago. It could be had with the sleeve P/N 14090594. Also disc. The purple is still available for 8.00 at the dealer. The other one THE SHAGGY IROC
</font>
the drive gear is a purple 7 tooth, P/N 14071731, and the driven gear is a orange 21 tooth,P/N 14090582. The orange one was discontinued 2 years ago. It could be had with the sleeve P/N 14090594. Also disc. The purple is still available for 8.00 at the dealer. The other one
THE SHAGGY IROC</font>
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Thread Starter
Senior Member
iTrader: (4)
Joined: Aug 1999
Posts: 629
Likes: 0
From: previously OKINAWA JAPAN,georgia, now new england
Car: 1989 IROC--1989 T/A
Engine: 5.7 TPI in both
Transmission: W/C T-5 in both
Axle/Gears: B/W 3.27 in both
I knew that, i was getting the 7/ 21 p/n for the t-5 , i was also trying to confirm the 15 drive and 45 driven is actually for 7r4 with 3.73. Also I was needing clarity on the 15/41 tooth for 3.42.
------------------
'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money
------------------
'89 SHAGGY IROC
L98 7r4, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc.
so much to do , so little money
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