Hello all,
I have the Sahara diesel with the auto, and i assume i have 3.21:1 diffs????
This has always seemed a bit high geared anyway, but i am running 35" now, what ratios have any of you Euro Jeepers changed to, to get a good drivable Jeep, 4door sahara????

All suggestions welcome.

 

First, determine what gear ratio you have.
The method below works for the ratios available in the US. Your ratio may be slightly different. So, get a list of UK diesel ratios, and you can substitute the ratios at the end of the post.



Chock the front tires, fore and aft.
Put the transmission in neutral.
Emergency brake off.
Jack the left rear tire off the ground.
Put a jack stand under the frame, just in case the jack fails (had to add this).
Put an index mark on the aft end of the drive shaft, visible from the left rear wheel.
Put an index mark on the left rear tire at the 6 o'clock position.
Rotate the left rear tire 2 complete revolutions while counting how many times the index mark on the drive shaft passes its original position.
That number will be your axle ratio.
Remove jack stand and lower jack.
Put transmission in gear or Park, apply emergency brake.
Remove chocks.
If you have limited slip, jack up both rear wheels and rotate one revolution, making sure both tires rotate equally.

If the drive shaft rotated almost 3 1/4 turns, you have 3.21
If the drive shaft rotated almost 3 3/4 turns, you have 3.73
If the drive shaft rotated a little over 4 turns, you have 4.10
If the drive shaft rotated a little under 5 turns, you have 4.88
If the drive shaft rotated a little over 5 turns, you have 5.13

 

Thanks for that, will check it out, have done it in the past on other trucks, was just hoping some of the euro jeepers, might have done some regearing with the diesel.
I put 35" on it, and it would drive ok, but not great.

The strange thing was, i have the AEV premium 3.5 kit fitted, and it drives sweet with standard size tyres, a bit vague, and light on the steering, but its like that from new, but with the 35" on, it just seemed to steer better, better balanced.

Looking at a 4 door with 35s it looks right, all in proportion, so was this how it was designed, and watered down for the general public????

 

You could have indeed 3.21, in Italy and in Germany they all come with 3.21 and you get the 3.73 with the Off-road pack II (the LSD).

 

I got the 3.73's 2009 model...

KSK

 

Not a eurojeeper, nor do I have a diesel but with the torque and horsepower curves 4.10s would plenty steep for a daily driver and a great trail rig for an automatic. Anything higher is going to really place you at pretty high revs on the highway for the CRD.

If you could shed a little more light on how you use your jeep, highway/city mile percentages, trail use, rolling hills you may encounter and the like it would he be easier to give you some more exacting information.