question. IIRC, changing to a 7 tooth gear drive, red 21 tooth gear, and 3.73's out back will make the speedo 100% accurate. is this correct?
7 tooth speedo gear drive
- Thread starter legalize420
- Start date
really? and the speedo will be accurate? i found some info in the 5.0 section saying to use a 21 tooth gear. i have the 23 in there now so i wanted to find out which one to use
i bought a tranny with a 7 tooth drive
i bought a tranny with a 7 tooth drive
JJ95GTID
Active Member
legalize420 said:
Yep, you are correct. Just looked it up in the FRPP catalog 21 external with a 7 internal. The white 23 tooth external gear is for those of us with the stock 8 tooth internal gear.
JJ95GTID
Active Member
Car Nut
Founding Member
Yep, you are correct.
I have the 7 and the 20 with 3.55 gears and the speedo is perfect. I would think the 21 would be for 3.73 as stated above. Swapped out the 8 for a 7 since the clutch was being replaced. Now I don't have to wonder when the 23 tooth gear will get chewed up.
I have the 7 and the 20 with 3.55 gears and the speedo is perfect. I would think the 21 would be for 3.73 as stated above. Swapped out the 8 for a 7 since the clutch was being replaced. Now I don't have to wonder when the 23 tooth gear will get chewed up.
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