Speedometer Drive Gear
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Cross-Country
Joined: Jul 2004
Posts: 70
Likes: 3
Speedometer Drive Gear
Can anyone help me figure out what gear I need? I know there is a formula for it but it requires that you know the number of teeth... if I knew that then I guess I would know which gear to get. I have a 2:73 gear and posi traction.
82 F151, 300 4.9
thanks
82 F151, 300 4.9
thanks
FTE Legend
Joined: Nov 2015
Posts: 30,870
Likes: 4,113
From: Angier, NC
What size tires and transmission / transfer case if 4x4.
Also if going XX speed what dose it read now?
You can get apps for your phone to know just how fast you are going.
Google Maps gives speed and I used my truckers GPS that matched my work truck, my 2nd truck and Google Maps.
Over here in documents at the top there might be information on the speedo gears both drive (transmission) and driven (cable end).
https://www.garysgaragemahal.com/
Dave ----
Also if going XX speed what dose it read now?
You can get apps for your phone to know just how fast you are going.
Google Maps gives speed and I used my truckers GPS that matched my work truck, my 2nd truck and Google Maps.
Over here in documents at the top there might be information on the speedo gears both drive (transmission) and driven (cable end).
https://www.garysgaragemahal.com/
Dave ----
Hotshot
Joined: Jun 2015
Posts: 12,786
Likes: 2,422
It takes like five, maybe ten minutes to pull and reinstall the driven speedometer gear out of the transmission or transfer case to see what color gear is on there now. Why do you need a different one? Did you change the tire size or gear ratio in the differential(s)?
Lead Driver
Joined: Jun 2013
Posts: 5,653
Likes: 1,157
From: Tolland, CT
Or did you get a speeding ticket...? ):
I have stock tire size, but I have a thought that before my dad bought the truck back in 1989, I have a suspicion that tranny was replaced. As mine seems to read slow when I'm traveling in the right lane on the highway doing 60mph and keeping up with traffic.
I have stock tire size, but I have a thought that before my dad bought the truck back in 1989, I have a suspicion that tranny was replaced. As mine seems to read slow when I'm traveling in the right lane on the highway doing 60mph and keeping up with traffic.
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