I have a 2001 Sport, I6, 5spd that I believe has been regeared to 4.56. I say believe because I have not cracked open the diff yet to take a look. I have came to this conclusion based upon the following.
Missing axle tag
Roughly 3200 RPM in 4th gear at 65 mph
Speedometer is fast (If my actual speed is 65 it reports over 75). I assume it was changed at some point in its life to support bigger tires.
It also does have a SYE, what I believe to be a 4" Procomp lift and roughly 1.25" of body lift. I should also note that if I spin one rear tire forward the other one spins backwards (open diff?).
Never the less I do plan on opening up the diff soon to change fluids, I'll count teeth to get an accurate ratio. While I have the diff open is there any possible way of identifying if this has been upgraded to a Super 35? I appreciate any help that I can get.
I also believe the end of the axle shafts (on the wheel side) will have a superior logo/stamp/sticker on them. You can also pull the shaft and count the splines.
03-04-2013 07:11 PM
It'll be a full case locker w/o spider gears if it's super. Someone smarter than me will remember better but super 35s come with a truss?
edit you can also jack it up and see how many times you have to turn the driveshaft for 1 full tire rotation
03-04-2013 07:33 PM
Super 35 kits don't come with a truss. Yep, look at the axle shaft mounting flange through the hole in the wheel. If it's an aftermarket Super 35 shaft, the manufacturer will be proud enough of it that his logo will be there.
03-05-2013 06:05 PM
Thanks for the responses. Looks like my best option is just to pull a tire and take a look at the end of the shaft. The cold weather doesn't motivate me to do any wrenching.
From my understanding a person could put new 30 spline axle shafts in but with out a locker. I understand that the carrier would need to be upgraded to support the 30 splines? Would the stock dana 30 and dana 35 support 4.56 with out a new carrier?
03-05-2013 07:59 PM
I don't know where you would find an open 30 spline Dana 35c carrier.
03-05-2013 10:56 PM
Thanks Jerry, this has cleared up a lot up for me. I am really green to both jeeps and wrenching. Thank you again.