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can you guest my gears?

projectTK

NAXJA Forum User
Location
Swantucky
89xj 4.0 ba10 peugot 5spd tranny, new clutch, new flywheel, 31's and previous owner didnt know much about it. I keep up with traffic in a 55mph zone running between 45 and the hash inbetween 45 and 50 mark. So i know i dont have the 3.07 then because people on here have told me i would be around 5mph off in 5th gear.

Can anybody tell me what gears i have? thanks:eek:
 
you think everyone in a 55 zone is driving exactly 55?

Most likely you have 3.07 UNLESS you have a tow package...
 
okay well now im figuring out how much my odometer is off. does anyone know how much 1 mile on the odometer is worth with my 31's and 3.07's?

I was running a slipping clutch and couldnt use 5th gear and i filled it up full and i drove 120miles and filled up again and i put 13gallons o gas in. So i figure 9.23mpg. I know darn well that is right maybe close cause i was in 4th gear. My clutch is new so i can run 5th. But i would like to know what the actual mileage is.
 
Screw taking the cover off... Put your jeep on level ground, chock the front wheels, put a jack under the back axle so the rear tires are off the ground, put your t-case in N and undo your parking brake. Then spin your driveshaft 10 times and count how many times your tires rotate.

ie 3 rotations is probably 3.07 and 3.5 rotations is 3.55 etc.

Enjoy... NAXJA

-Alex
 
mmmmm...doughnuts....
 
alexer03 said:
Screw taking the cover off... Put your jeep on level ground, chock the front wheels, put a jack under the back axle so the rear tires are off the ground, put your t-case in N and undo your parking brake. Then spin your driveshaft 10 times and count how many times your tires rotate.

ie 3 rotations is probably 3.07 and 3.5 rotations is 3.55 etc.

Enjoy... NAXJA

-Alex

I agree, this is the easy way to tell for sure....or just open the diff up and look, hell, you probably need to change the fluid anyhow.
 
alexer03 said:
Screw taking the cover off... Put your jeep on level ground, chock the front wheels, put a jack under the back axle so the rear tires are off the ground, put your t-case in N and undo your parking brake. Then spin your driveshaft 10 times and count how many times your tires rotate.

ie 3 rotations is probably 3.07 and 3.5 rotations is 3.55 etc.

Enjoy... NAXJA

-Alex

Close, but backwards.

Turn the tires once, count the driveshaft rotations. Then 3 means 3.07, 3.5 is 3.55, like you said.

The 3.07:1 ratio is driveshaft : axlesaft.

I can explain the math later if you want, but I gotta get to work now...

Robert
 
Robert 771 said:
Close, but backwards.

Turn the tires once, count the driveshaft rotations. Then 3 means 3.07, 3.5 is 3.55, like you said.

The 3.07:1 ratio is driveshaft : axlesaft.

I can explain the math later if you want, but I gotta get to work now...

Robert

Shouldn't they both work the same?
He's just saying the ratio this way - 1:3.07
 
the tag doesnt matter. The previous owner before the one i bought it off of said he went thru a lot axles. So maybe he put a deeper gear axle in. I guess not. I just heard people complaining how 31 and 3.07 is so sluggish. I dont think its bad, its tolerable. I just cant imagine 456's in it. Almost pull a dirt or road wheelie. SO its 11% off for the speedo and the odometer also?
 
my guest is as good as you guest.

/end sarcasm.
 
Most of the axle tags I've seen were bolted right to the axle. Did you look to see if there is a code tag on the axle? If there's not then follow some of the previous advice generously given by those who know. If there is a tag I guest you can find the right ration there.
 
joshv98xj said:
Shouldn't they both work the same?
He's just saying the ratio this way - 1:3.07
No they shouldn't. The ring gear is much bigger than the pinion, so if you turn the ring gear around once, it will turn the pinion 3.07 times. Therefore, 3.07:1. If you turn that pinion once, it will not turn the ring gear 1 full time, since it requires the pinion to turn a full 3.07 times for 1 axle rotation, let alone 3.07 times, therefor it cannot be 1:3.07.
 
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