danas

[leatherneck]

Ok guys im new to the game so this queation may sound a little noobish.
Is there a way to tell what axels and gears you have by running the numbers? I have an 03 TJ and I know they are stock danas but that is all I know. The numbers are all clearly legible

[Cjack350]

If it's not a rubicon that I believe you have a dana 35 rear and a 30 front...

As far as the gearing, that depends on your engine. I'm sure another TJ guru will post up and tell you

[dmaxjeep]

if you have a 6 cyl with manual tranny, its probably geared at 3.73, auto probably 4.10, 4 cyl probaly 4.10 as well. hopefully its not a 3.07, had that in my old yj and it lost 5th gear after putting on 31 inch tires

[Jeffb_79]

What model is your jeep?
The easiest way is to go out and look at the axles.
If your jeep is a non-rubicon model, you have a dana 30 front. Your rear will either be a dana 35 or a dana 44. Rubicons had D44's front and rear. Some saharas and sports had a d44 as an option, some had a D35. X's came with a D35. The easiest way to tell... most newer D35's have a rubber fill plug, not a metallic one.
Gears, if it's a non-rubicon you've either got 3.07 or 3.73 gears. I don't believe any model but the Rubicon came with 4.10 gearing except for the 4 bangers.
There should be a tag on each differential housing. It will be attached by bolts that hold the cover to the body. It's going to have a list of numbers and letters on it.
Somewhere on that tag will either be a 307, 373 or 410 (maybe 411).

[reservoirdogg26]

there is a way to do it by lifting your truck and spinning you wheels a certain number of times, then counting the revolutions of your driveshaft..not sure what the formula was but i read it on jeep forum a while back, but if its stock you can get your vin and get a factory printout of your jeep and it will tell you

[reservoirdogg26]

Dana 30 (181 mm) - 1997-2006



* Front axle used on all TJs except the Rubicon model
* Stock gear ratio options = 3.07, 3.55, 3.73, 4.10, 4.56
* Carrier break = 3.55 / 3.73
* Open carrier - no Trac-Lok limited slip option
* Ring gear diameter = 7.125"
* Ring gear bolts = (10) 3/8 x 20 RH
* Low pinion (short pinion)
* Pinion shaft diameter = 1.376"
* Pinion shaft spline count = 26
* Axle shaft diameter = 1.16"
* Axle shaft spline count = 27 both inner and outer
* Axle shaft u-joints = 5-760x / 5-297x
* WMS-WMS = approximately 60.5"
* 5 on 4.5" bolt pattern

---------------------------------------------------------------------

Dana 35c (194mm) - 1997-2006



* Standard rear axle used on all TJs except the Rubicon model
* Stock gear ratio options = 3.07, 3.55, 3.73, 4.10, 4.56
* Carrier break = 3.31 / 3.55
* Optional Trac-Lok limited slip differential
* Ring gear diameter = 7.5625"
* Ring gear bolts = (8) 3/8 x 24 RH - NOTE: 7/16" x 20 RH used on later model TJs
* Low pinion
* Pinion shaft diameter = 1.406"
* Pinion shaft spline count = 26
* Axle shaft diameter = 1.16"
* Axle shaft spline count = 27
* WMS-WMS = approximately 60.5"
* 5 on 4.5" bolt pattern
* Rubber pressed-in fill plug

---------------------------------------------------------------------

Dana 44 (216mm) - 1997-2006



* Optional rear axle used on 6 cyl models except the Rubicon model
* Stock gear ratio options - 3.55 (97 only), 3.73
* Carrier Break = 3.73/3.92
* Standard Trac-Lok limited slip differential on early model TJs / Optional on later model TJs
* Ring gear diameter = 8.5"
* Ring gear bolts = (10) 3/8 x 24 RH - Note: 7/16" x 20 RH used on later model TJs
* Low pinion
* Pinion shaft diameter = 1.376"
* Pinion shaft spline count = 26
* Axle shaft diameter = 1.30"
* Axle shaft spline count = 30
* WMS-WMS = approximately 60.5"
* 5 on 4.5" bolt pattern
* Threaded 3/8" fill plug

---------------------------------------------------------------------

Dana 44 (216 mm) Rubicon- 2003-2006



* Standard front axle used on all Rubicon model TJs
* 4.10 gears
* Tru-Lok selectable pneumatic locker - open differential when unlocked
* Ring gear diameter = 8.5"
* Ring gear bolts = (10) 7/16" x ??
* Low pinion
* Pinion shaft diameter = 1.376"
* Pinion shaft spline count = 26
* Axle shaft diameter = 1.30"
* Axle shaft spline count = 30 inner / 27 outer
* Axle shaft u-joints = 5-760x / 5-297x
* WMS-WMS = approximately 60.5"
* 5 on 4.5" bolt pattern

Note: The outer axle shafts, unit bearings (hubs), knuckles, and brakes are the same as those found on the TJ D30.

---------------------------------------------------------------------

Dana 44 (216 mm) Rubicon - 2003-2006



* Standard rear axle used on all Rubicon model TJs
* 4.10 gears
* Tru-Lok selectable pneumatic locker - limited slip differential when unlocked
* Ring gear diameter = 8.5"
* Ring gear bolts = (10) 7/16" x ??
* Low pinion
* Pinion shaft diameter = 1.376"
* Pinion shaft spline count = 26
* Axle shaft diameter = 1.30"
* Axle shaft spline count = 30
* WMS-WMS = approximately 60.5"
* 5 on 4.5" bolt pattern

[reservoirdogg26]

hope that helps...

[leatherneck]

Thanks for the responses guys looks like 307s. options? find rubicons for it change these out with 410s and lockers? I have lots of mechanical but lack certian exp. I have to be able to do it myself. Also need the most cost effective way to do it due to this is my DD so any suggestions are appreciated

[irish1371]

yea easiest options would be to grab a set of axles out of a rubi for d 44's with 4.10's or probably more likely to find and old/wrecked 4 banger they only had d30/d35 like you but had 4.10 gears

[dmaxjeep]

anything that says Rubicon on it is $$$pricey$$$ so there must be gold plated lining in the housing.