Finding Gear Ration

[Dangerousdave26]

I have a 2004 Jeep Liberty Renegade 4x4

I have a few leaking seals so I figure its time to do an overhaul or replace the rear end with a locking or limited slip.

I know it is a Dana model 35 but the tags on it are gone.

Is there a way to know the ratio of the rear end from the VIN #?

 

[HoosierJeeper]

All KJs except some early 02s and some South American ones have the 8.25 rear I'm pretty sure. Gears will be 3:73 unless you have the 2.4 4cylinder, then it'll have 4:10s.

 

[Hedsic]

If you ever want to check your build sheet instantly to see what all it has go here

https://customerconnect.custhelp.co...2F2LzEvdGltZS8xMzg0MzcwMDk4L3NpZC9qOW50Z2dGbA

 

[tommudd]

I have a 2004 Jeep Liberty Renegade 4x4

I have a few leaking seals so I figure its time to do an overhaul or replace the rear end with a locking or limited slip.

I know it is a Dana model 35 but the tags on it are gone.

Is there a way to know the ratio of the rear end from the VIN #?

Yes no 35 in yours , only 8.25 , wouldn't waste my time with a limited slip

 

[4x4kayak2112]

2004, it has a 8.25

 

[Birdman330]

All KJs except some early 02s and some South American ones have the 8.25 rear I'm pretty sure. Gears will be 3:73 unless you have the 2.4 4cylinder, then it'll have 4:10s.

When I was working for Chrysler, I was able to see all the specs on my Jeep. I have 3:55 actually.

 

[tommudd]

When I was working for Chrysler, I was able to see all the specs on my Jeep. I have 3:55 actually.

You have a manual so yes 3.55s

Gas 2.4 KJ,auto or manual--4.10's
Gas 3.7 KJ,auto--3.73's
Gas 3.7 KJ,5 speed manual--3.73's
Gas 3.7 KJ,6 speed manual--3.55's
US CRD(auto only)--3.73's
Export CRD with 2.8,auto--3.73's
Export CRD with 2.5,auto or manual--4.10's

 

[CactusJacked]

...but the tags on it are gone.
Is there a way to know the ratio of the rear end from the VIN #?

Because a previous owner either: changed the oil, or changed the gears and oil, and left the tag off.
The above application guide is fine assuming nothing has been changed on yours. You know what happens when one assumes. There are a number of guys here who have changed their gears, and a future owner can't go by that info.
The way to know what is in yours is by opening it up, or giving the wheel a turn & count test. With an open diff, raise one tire off the ground, put trans in neutral, turn the wheel one revolution, and count the number of turns the driveshaft makes. With an lsd, do the same, but raise both tires off the ground.

 

[ElCheapo]

Because a previous owner either: changed the oil, or changed the gears and oil, and left the tag off.
The above application guide is fine assuming nothing has been changed on yours. You know what happens when one assumes. There are a number of guys here who have changed their gears, and a future owner can't go by that info.
The way to know what is in yours is by opening it up, or giving the wheel a turn & count test. With an open diff, raise one tire off the ground, put trans in neutral, turn the wheel one revolution, and count the number of turns the driveshaft makes. With an lsd, do the same, but raise both tires off the ground.

There you go right there. But, to finish, mark a spot on the shaft and on the housing, to get an accurate count. Just a shade over 4 turns is 4:10, about 3 1/2 turns, 3:55, and about 3 3/4 turns 3:73, I think you get the idea.

 

[u2slow]

...wouldn't waste my time with a limited slip

^ What he said. :gr_grin: