sixditchoffroad
NAXJA Forum User
- Location
- Denver, Colorado
Any one know how far off on mph a jeep is with 3.07's and 35's?
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How far off ?
- Thread starter sixditchoffroad
- Start date
1sickhick
NAXJA Forum User
- Location
- podunk wa.
91Woody
NAXJA Forum User
- Location
- Manchester, NH
shouldn't be off at all because it shouldn't be moving.:skull1:
That aside, I would expect 10-12 if you had to drive it to get the new gears installed.
That aside, I would expect 10-12 if you had to drive it to get the new gears installed.
1sickhick
NAXJA Forum User
- Location
- podunk wa.
91Woody said:
X2
Desertfox
NAXJA Forum User
- Location
- Charlotte, NC
Your speed change is not a direct MPH, its a percent change.
Heres a calculator link - http://www.therangerstation.com/tech_library/Speedometer_Change_From_Tires.html
I'd did mine for my usual running speeds of 35, 45, 55, and 70.
Heres a calculator link - http://www.therangerstation.com/tech_library/Speedometer_Change_From_Tires.html
I'd did mine for my usual running speeds of 35, 45, 55, and 70.
Char-Broil
NAXJA Forum User
- Location
- PA
its going to be off by a percentage. i had 31's with 3.07s and it was off by about 10%. best ways are 1. GPS, buy one or have a friend with one ride along with you. or 2. drive down the highway and go, for example 10 miles. reset your trip meeter at a mile marker and see how far from agreement with the mile markers it is after 10 miles. this will give you your rough percentage of how far off it is. btw, how do you pull out with a manual and 35s? my flywheel was getting hot spots with 31's and 3.07s if i pulled out on hills too often.
trail rate this
NAXJA Forum User
- Location
- Cape Coral, FL
I have a 98 XJ with 3.55 gears stock running 33's. I had my wife drive behind me and at 70 MPH my speedo said 59.
Man was that thing a dog on any type of incline. You must start going backwards.
I went to 4.10 gears then checked with a GPS, and my speed is corrected now. Try different tooth gears.
Good luck
Man was that thing a dog on any type of incline. You must start going backwards.
I went to 4.10 gears then checked with a GPS, and my speed is corrected now. Try different tooth gears.
Good luck
99XJWhitey
NAXJA Forum User
- Location
- Kentucky
all the cool kids are running 5.13's :viking:
rockhounds4x4
NAXJA Forum User
- Location
- bailey, co
My 98 xj was off by more than 20 mph before I got the right speedo gear
lancey3
NAXJA Forum User
- Location
- Columbus Ohio
1sickhick said:
I wouldn't fault the gears for breakin parts.
sixditchoffroad
NAXJA Forum User
- Location
- Denver, Colorado
Thats what I thought, but it supprised the hell outa me. I can feel a slight change in acc. but not much. It wheels great too. I'm not going to change gears until I lock the thing. If its not broke dont fix it.Del00XJ said:
sixditchoffroad
NAXJA Forum User
- Location
- Denver, Colorado
figured it out.. Going from orginal 28's to bfg mt 35's is as follows
speedo reading... actual speed
30... 37.5
35... 44
40... 50
45... 56
50... 62.5
55... 69
60... 75
That should be some help to others, with the same problem.
speedo reading... actual speed
30... 37.5
35... 44
40... 50
45... 56
50... 62.5
55... 69
60... 75
That should be some help to others, with the same problem.
- Location
- Seattle, WA
Stock tire is 28", New tire is 35"
35/28 = 1.25
Multiply your shown MPH by 1.25 and that is your true speed. Same speeds as sixditch shows.
35/28 = 1.25
Multiply your shown MPH by 1.25 and that is your true speed. Same speeds as sixditch shows.
