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same old 3.07 speed gear question

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Old 09-07-2017, 01:52 PM
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clove86
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Default same old 3.07 speed gear question

i have 1991 coupe that i installed a 3.07 rear in. i have been trying to get a corrected speedo gear for it.
does anyone know where to find a green 42 tooth gear for sale? that will fit my vss? i cant find it. all these posts are old. it is now 2017 and i think my options are slim.

i have the vss 10456091.
i have found a 10456092 for sale.

i have ordered a 40tooth gear that is readily available. i know this gear is not perfect and the speedometer will read a little fast. but, will is be good enough? its the only other gear that CC sells.
i want to do this without changing both drive and driven gears.

any help is appreciated
thx
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Old 09-07-2017, 02:27 PM
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WVZR-1
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Originally Posted by clove86 View Post
i have 1991 coupe that i installed a 3.07 rear in. i have been trying to get a corrected speedo gear for it.
does anyone know where to find a green 42 tooth gear for sale? that will fit my vss? i cant find it. all these posts are old. it is now 2017 and i think my options are slim.

i have the vss 10456091.
i have found a 10456092 for sale.

i have ordered a 40tooth gear that is readily available. i know this gear is not perfect and the speedometer will read a little fast. but, will is be good enough? its the only other gear that CC sells.
i want to do this without changing both drive and driven gears.

any help is appreciated
thx

I have a 42T driven NOS - you'll need the 10456092 VSS that you've found for sale. There's some conflicting information regarding the VSS applications in threads on the forum and also in the GM SPO catalogs I believe.

You'll need the 10456092 for the 40 tooth that you've already ordered. Drive the 40 tooth and see if it makes you happy - if not contact me.
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Old 09-07-2017, 02:53 PM
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BlowerWorks
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Green - 42 ? I have several .........
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Old 09-08-2017, 01:53 PM
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clove86
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Awesome thx.

I got really confused reading all of the threads and charts

Last edited by clove86; 09-08-2017 at 01:54 PM.
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Old 09-08-2017, 06:20 PM
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Originally Posted by clove86 View Post
Awesome thx.

I got really confused reading all of the threads and charts
Yep I swapped to 3.73 over the winter, I thought the same & I still haven't changed out any of the speedo gears. Speedo is off like crazy.
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Old 09-09-2017, 03:17 AM
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Originally Posted by clove86 View Post
Awesome thx.

I got really confused reading all of the threads and charts
Hi

Go for the blowerworks green 42 tooth gear, they are hard to find.
My c4 has the factory 3.07 rear and with 275 40 17 tires and has the green gear in the transmission,
the speed display is spot on compared to GPS speed display.


Last edited by gerardvg; 09-09-2017 at 03:18 AM.
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Old 09-12-2017, 05:12 PM
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Originally Posted by BlowerWorks View Post
Green - 42 ? I have several .........
I'll take one send me your paypal.
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Old 09-13-2017, 09:19 PM
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clove86
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Originally Posted by WVZR-1 View Post
I have a 42T driven NOS - you'll need the 10456092 VSS that you've found for sale. There's some conflicting information regarding the VSS applications in threads on the forum and also in the GM SPO catalogs I believe.

You'll need the 10456092 for the 40 tooth that you've already ordered. Drive the 40 tooth and see if it makes you happy - if not contact me.
car is complete with new vss and 42t gear.
big shout out to WVZR-1 for all the help and support and the proper gear for the job. He is a great seller with active support.

I got the parts in the mail and installed instantly. It all went together like legos. The speedometer is spot on and the car is now running better than ever.
thanks to the new alternator and serp belt that busted on me at midnight... different story.

thanks too everyone for all the advice

Last edited by clove86; 09-14-2017 at 07:23 AM.
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Old 02-21-2018, 09:40 AM
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I need help
I've noticed the shift light and the car feels like it's shifting in and out of over drive at cruising speeds.

Again, I upgraded to 3.07 rear

What is the solution for this?

Thank you
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