speedo correction
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
speedo correction
Well awhile back CFI-EFI gave me the part no. for speedo gears. Now I have a 4.09 gear, automatic, and 285x40x17 tires. I actually told him I had 26 in tires, which I do, (et streets) but I believe my street tires are a little less.
Anyways, I told him I would post results based on my gps that I have.
The speedo. in the car at 65mph is actually 60 according to my gps. Not exact but close enough for a car I only get to drive about 2000 miles a year.
This is with a 15t. drive gear and a 45t. driven gear. GM does not make a 46 or 47 for the 700r4 trans.
Thanks CFI-EFI for your help.
Anyways, I told him I would post results based on my gps that I have.
The speedo. in the car at 65mph is actually 60 according to my gps. Not exact but close enough for a car I only get to drive about 2000 miles a year.
This is with a 15t. drive gear and a 45t. driven gear. GM does not make a 46 or 47 for the 700r4 trans.
Thanks CFI-EFI for your help.
