tbear
NAXJA Forum User
- Location
- st.charlesmo.
who has the link for the speedo gear chart. i finally figured out what gears i got thanks
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speedo gear
- Thread starter tbear
- Start date
tbear
NAXJA Forum User
- Location
- st.charlesmo.
thanks but it only goes to 373 ineed 355s still stock gears but with 31s
- Location
- Terra Firma
Try a 33-tooth gear.
Yeah, the chart says 32-tooth for 31" tires, but most 31" tires actually measure about 30.4". I run 3.73 gears in my MJ. I bought a 34-tooth gear based on the chart when I planned to buy 30" tires. But my brother gave me his old 31s, and with that gear and 31x10.50 tires the speedo is EXACTLY on the money when I drive through those radar trailers that cops in the northeast like to set out nowadays. Chart says I should be running a 33-tooth gear, so I'm guessing that you'll want one more tooth than what the chart says since that's what worked for me.
Yeah, the chart says 32-tooth for 31" tires, but most 31" tires actually measure about 30.4". I run 3.73 gears in my MJ. I bought a 34-tooth gear based on the chart when I planned to buy 30" tires. But my brother gave me his old 31s, and with that gear and 31x10.50 tires the speedo is EXACTLY on the money when I drive through those radar trailers that cops in the northeast like to set out nowadays. Chart says I should be running a 33-tooth gear, so I'm guessing that you'll want one more tooth than what the chart says since that's what worked for me.
tbear
NAXJA Forum User
- Location
- st.charlesmo.
thanks eagle gonna get one tomorrow
thompson97
NAXJA Forum User
- Location
- harrisonburg, va
i apologize for hijacking, but it seems your query has been answered. anyway, i have a 5 spd. the stock speedo gear has 30 teeth if i recall correctly. i've changed my gear ratio from 3.07 to 4.10's. the chart that everyone has posted links to points me towards a 36 tooth gear for my new 33's. my question is: on that same chart, the tooth count goes down coinciding with larger tires. why then, would my tooth count increase? thanks in advance.
thompson97
NAXJA Forum User
- Location
- harrisonburg, va
anyone?
- Location
- Westminster, SoCal
thompson97 said:
Cause you're doing two things at the same time. You're both swapping tire sizes and gears so one and the other add to eachother for the calculation.
wascobi
NAXJA Forum User
- Location
- abbotsford, b.c. canada
eagle
where did you get a 34 tooth? . the closest my stealership could get was a 33(which is what the chart said I need) my speedo reads about 5% to fast.using a gps. mine is a '90 and it uses the long shaft.
thanks, scott
where did you get a 34 tooth? . the closest my stealership could get was a 33(which is what the chart said I need) my speedo reads about 5% to fast.using a gps. mine is a '90 and it uses the long shaft.
thanks, scott
- Location
- Terra Firma
wascobi said:
Got it from the dealer. He didn't have it listed when he looked them up, but the last 2 digits of the part number are the tooth count, and when we punched that in it came up as a valid number -- so I ordered it.
