Speedometer gears M5OD-R2

[Ramcharger90]

So I think I can just use the plastic gears from lmr or steeda etc. With a M5ODR2 transmission but when I put everything in the calculator the gear is always a tooth and a half off. And I dont remember what color the gear was that was in the transmission. I believe I may need the white gear or the red gear. For 235/75R15 with 3.73 gears. The gear that came out of the f150 trans when I put the ranger vvs in was yellow if that helps.

 

[RonD]

You need to know the Drive gears tooth count as well

6, 7, or 8 tooth

 

[Ramcharger90]

Yeah I forgot about that one and now the transmission is in, so thats not coming back out for that. unless I can see the color of the drive gear from the vss hole. I seem to remember that normally the drive gear is color coordinated to ta ta tooth count

 

[RonD]

The year of transmission can help, usually its 7 tooth on manuals, but it depends on the rear axle gearing offered in that model F150 that year

Rangers were 7 tooth because that covered 3.08 to 4.10

 

[Ramcharger90]

I wanna say 7 but, it slipped my mind when I had the trans apart, either way every combination of gear I tried in the calculator would be a tooth or 2 off ill probably just order the 3 closest and pace someone or ask a trooper I know to hit it with the radar.

 

[RonD]

Your 235/75/15 tires have 699 revolutions per mile, with 7 tooth drive gear and 3.73 axle thats 18.23 driven gear, so 18 tooth is darn close, and thats usually a Yellow gear

 

[Bird76Mojo]

You'll have to fine tune your indicated speed with tire size when you get it close with the correct gear..

 

[scrapper]

You may not be able to get it perfect. The best I got was still 2mph off. Have someone set cruise next to you and see where you are at. It changes the amount its off I think its worst the faster you go?

 

[Biggfoot44]

That's so 1960's . In the modern era , use your handheld GPS unit to verify speed real time .

 

[Dirtman]

GPS isn't that precise. Especially if you live in hill country.

 

[Ramcharger90]

Pff lucky I even went fuel injection

That's so 1960's . In the modern era , use your handheld GPS unit to verify speed real time .