Speedo gear source
Thread Starter
Burning Brakes
Joined: May 2000
Posts: 1,243
Likes: 1
From: Charlotte, NC USA
Speedo gear source
I am putting in a D44 - 3.45:1, replacing the stock D36 - 3.07:1 on my 84 with A4 and need the speedometer gear. Can anyone point me in the right direction to a source?
Thanks in advance for your help...
Thanks in advance for your help...
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
The GM dealer is a good source for the gear. They are cheap. CFI-EFI has helped many on here figure the correct ratio. He may see this post and add to it with part nos. You need your tire size to do the calculations.
Instructor
Joined: Jun 2005
Posts: 161
Likes: 0
From: Toronto Ontario
I am also looking for a speedo gear for my 92 when I went from 3.45 to 4.10. It drives me crazy not knowing how fast I am really going.
Apparently in the 92 ECM program you cannot edit for gear changes. Later years you can.
Any help would be appreciated.
Apparently in the 92 ECM program you cannot edit for gear changes. Later years you can.
Any help would be appreciated.
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Both you guys got lucky. Of the three pieces that often need to be changed, the drive gear, the driven gear, and the VSS, each of you only has to change one item.
Black84,
You have to replace the red, 17 tooth, drive gear with a grey, 15 tooth drive gear, part number, 8642620.
Aqualung,
All you have to change is your driven gear. Swap out your green, 42 tooth, driven gear for a light blue, 45 tooth driven gear, part number 25513052.
As far as I know the best prices on these parts come from a GM dealer. Particularly Superior Chevrolet.
RACE ON!!!
Black84,
You have to replace the red, 17 tooth, drive gear with a grey, 15 tooth drive gear, part number, 8642620.
Aqualung,
All you have to change is your driven gear. Swap out your green, 42 tooth, driven gear for a light blue, 45 tooth driven gear, part number 25513052.
As far as I know the best prices on these parts come from a GM dealer. Particularly Superior Chevrolet.
RACE ON!!!
Instructor
Joined: Jun 2005
Posts: 161
Likes: 0
From: Toronto Ontario
Originally Posted by CFI-EFI
Both you guys got lucky. Of the three pieces that often need to be changed, the drive gear, the driven gear, and the VSS, each of you only has to change one item.
Black84,
You have to replace the red, 17 tooth, drive gear with a grey, 15 tooth drive gear, part number, 8642620.
Aqualung,
All you have to change is your driven gear. Swap out your green, 42 tooth, driven gear for a light blue, 45 tooth driven gear, part number 25513052.
As far as I know the best prices on these parts come from a GM dealer. Particularly Superior Chevrolet.
RACE ON!!!
Black84,
You have to replace the red, 17 tooth, drive gear with a grey, 15 tooth drive gear, part number, 8642620.
Aqualung,
All you have to change is your driven gear. Swap out your green, 42 tooth, driven gear for a light blue, 45 tooth driven gear, part number 25513052.
As far as I know the best prices on these parts come from a GM dealer. Particularly Superior Chevrolet.
RACE ON!!!
Hey thanks CFI-EFI. Just the help I was looking for.
Burning Brakes
Joined: Feb 2003
Posts: 1,218
Likes: 0
From: Rolla Mo
I believe you will have to change all three, the drive, and driven gears, and also the speed sensor. Going from 2.59 to 3.54 I needed a gray and purple gear. Looks like you need a grey and green gear
Check Here
More good info!!!
look down the page and there is a calculator based on tire diameter and everything for the 700 r4
Check Here
More good info!!!
look down the page and there is a calculator based on tire diameter and everything for the 700 r4
Last edited by Dougs 90; Jul 18, 2005 at 12:18 AM.
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Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by BlackRoseLT1
hey CFIEFI i will be going from a D36 with 2.59's to a D44 with 3.45's...what do i need to do?
RACE ON!!!
