Technical Specifications

Need to find torque specifications for your Dana 60 ring gear bearing cap bolts? How about axle carrier gear ratio breaks? What parts and pieces can interchange or be made to fit other applications? This is the section for you. Bear with us, this is a work in progress.

Dana / Spicer BOM lookup:

https://www.expert.dana.com/expertforms/deabill.aspx

Dana / Spicer Ring and Pinion Pattern Documents:

http://media.spicerparts.com/cfs/files/media/NdAtv8jc72ycvzstk/5717%20Ring%20Gear%20pattern%20interpretation.pdf?token=eyJhdXRoVG9rZW4iOiIifQ%3D%3D&store=original

http://media.spicerparts.com/cfs/files/media/qSXWpbRys6R3ucSJm/shais168b.pdf?token=eyJhdXRoVG9rZW4iOiIifQ%3D%3D&store=original

JEEP MODEL "CODE" ID BY YEAR AND MODEL NAME:

1987 - 1995 Jeep Wrangler (square head lights): YJ

1997 - 2006 Jeep Wrangler: TJ

2004 - 2006 Jeep Wrangler Unlimited: TJU (but most people call it an LJ)

1984 - 2001 Jeep Cherokee: XJ

1986 - 1992 Jeep Comanche: MJ

1993 - 1998 Jeep Grand Cherokee: ZJ (if you don't know what a ZJ is, you can't afford one)

1999 - 2004 Jeep Grand Cherokee: WJ

2007 - 2018 Jeep Wrangler (2 door): JK

2007 - 2018 Jeep Wrangler Rubicon (2 door): JKR

2007 - 2018 Jeep Wrangler Unlimited (4 door): JKU

2007 - 2018 Jeep Wrangler Unlimited Rubicon (4 door): JKUR

2018 - 2020 Jeep Wrangler (2 door): JL

2018 - 2020 Jeep Wrangler Rubicon (2 door): JLR

2018 - 2020 Jeep Wrangler Unlimited (4 door): JLU

2018 - 2020 Jeep Wrangler Unlimited Rubicon (4 door): JLUR

2007 - 2018 Jeep Wrangler JK and JKU Front Dana 44 (216 mm / 8.5")

(2) Axle shaft nut torque: 100 ft*lb
(10) Differential cover bolt torque: 30 ft*lb
(4) Differential cap bolt torque: 80 ft*lb
(10) Ring gear bolt torque (7/16" bolts!!!): 100 ft*lb
(3) hub bearing bolt torque: 75 ft*lb
Pinion preload (used bearings): 10-20 in*lb
Pinion preload (new bearings): 20-40 in*lb
Ring gear backlash: .005-.008 in
21 mm caliper carrier bolt torque: 120 ft*lb
13 mm caliper bolt torque: 26 ft*lb
Lower ball joint torque (tighten this first): 80 ft*lb
Upper ball joint torque (tighten this second): 75 ft*lb
Pinion depth: TBD

2007 - 2018 Jeep Wrangler JK and JKU Rear Dana Super 44 (226 mm / 8.9")

(8) Axle retainer nut torque: 45 ft*lb
(10) Differential cover bolt torque: 30 ft*lb
(4) Differential cap bolt torque: 80 ft*lb
(10) Ring gear bolt torque (7/16" bolts!!!): 100 ft*lb
(10) Ring gear bolt torque (1/2" bolts!!!): 135 ft*lb
Caliper carrier bolt torque: 55 ft*lb
13 mm caliper bolt torque: 26 ft*lb
Pinion preload (used bearings): 10-20 in*lb
Pinion preload (new bearings): 20-40 in*lb
Ring gear backlash: .005-.008 in
Pinion depth: TBD
Rough start for crush sleeve eliminator / solid pinion spacer: .543"

2007 - 2018 Jeep Wrangler JK and JKU Front Dana Super 30 (186 mm / 7.8")

(2) Axle shaft nut torque: 100 ft*lb
(10) Differential cover bolt torque: 30 ft*lb
(4) Differential cap bolt torque: 45 ft*lb
(10) Ring gear bolt torque: 80 ft*lb
(3) hub bearing bolt torque: 75 ft*lb
Pinion preload (used bearings): 10-20 in*lb
Pinion preload (new bearings): 15-30 in*lb
Ring gear backlash: .005-.008 in
21 mm caliper carrier bolt torque: 120 ft*lb
13 mm caliper bolt torque: 26 ft*lb
Lower ball joint torque (tighten this first): 80 ft*lb
Upper ball joint torque (tighten this second): 75 ft*lb
Pinion depth: TBD

Chrysler 8.25" Rear Axle

Differential cap bolt torque: 60 ft*lb
Ring gear bolt torque: 55 ft*lb
Pinion preload (used bearings): 6 - 9 in*lb
Pinion preload (new bearings): 12 - 15 in*lb
Ring gear backlash: .006-.010 in
Pinion depth: TBD

Ford / Sterling 10.25" / 10.5"

Differential cap bolt torque: 80 ft*lb
Ring gear bolt torque: 95 ft*lb
Pinion preload (used bearings): 6 - 8 in*lb
Pinion preload (new bearings): 20 - 35 in*lb
Ring gear backlash: .006 - .010 in
Pinion depth: TBD

GM 10.5" 14 Bolt

Differential cap bolt torque: 135 ft*lb
Ring gear bolt torque: 120 ft*lb
Pinion preload (used bearings): 8 - 11 in*lb
Pinion preload (new bearings): 20 - 35 in*lb
Ring gear backlash: .006 - .010 in
(6) Pinion support bolt torque: 65 ft*lb
Pinion depth: TBD

Dana 30

Differential cap bolt torque: 60 ft*lb
(10) Ring gear bolt torque: 75 - 85 ft*lb
Pinion preload (used bearings): 6 - 9 in*lb
Pinion preload (new bearings): 12 - 15 in*lb
Pinion depth: 3.625"

Dana 35

(8) Ring gear bolt torque (3/8" bolts!!!): 55 ft*lb
Pinion depth: 2.095"

Dana 44

Pinion nut torque (shimmed preload style): 220 ft*lb
(10) Ring gear bolt torque (3/8" bolts!!!): 55 ft*lb
Pinion depth: 2.625"

Dana 60

Dana Technical Service Specs
Differential cap bolt torque: 90 ft*lb
Ring gear bolt torque: 110 ft*lb
Pinion preload (used bearings): 8 - 10 in*lb
Pinion preload (new bearings): 17 - 30 in*lb
Ring gear backlash: .006 - .010 in
Pinion depth: 3.125"
Backlash rough relationship to carrier movement: ~0.007” change in backlash per 0.010” the carrier is moved

Dana 70

Pinion depth: 3.500"

New Ring and Pinion Break-In Procedure

Read the entirety of this procedure before driving on the new ring and pinion(s).
Use only petroleum gear oil (not synthetic)
NO towing, NO heavy loads, NO hard acceleration, and NO other driving that will introduce heavier loads on the gear set(s) than cruising at a constant speed on level ground.
Drive 10 miles and do not exceed 40 MPH (listen for abnormal noises or anything else you may notice that could be causing damage inside the differential housing). Stop and check the housing temperatures near the pinion bearing and carrier bearing locations. Temperatures must not exceed 190°F (we use a Fluke IR hand held thermometer). Allow the differential to cool before proceeding.
If the trip resulted in temperatures not exceeding 190°F then add 5 miles to the previous trip distance and perform the same process. Repeat until there is more than 100 miles total of break-in trips.

If the trip resulted in a temperature 190°F or more, then continue to drive 10 mile trips. Perform the same process until temperatures are below 190°F. If you reach 100 miles of break in trips and the differential is still reading over 190°F, then an inspection inside the differential for an incorrect installation and/or component failure should be performed.
Once 100 miles total has been reached with break in trips, and not exceeding 190°F, you may increase your speed to 50 MPH and make 50 mile maximum trips. Stop and check temperature to monitor that it doesn't exceed 190°F. Allow it to cool before continuing. Repeat until the break-in trips total 300 miles or more.
Drain the fluid. Observe if there are any large chunks or other abnormalities. Small metal "flakes" (glitter looking) is normal to an extent.
Inspect the differential components for any other abnormal wear, damage, defects, etc.
Refill with new non-synthetic fluid.
Continue to drive with easy acceleration and a maximum speed of 65 MPH until 500 miles of total break-in trips has been reached . Monitor temperatures for the 190°F maximum and allow to cool if it's near that temperature.
Once above 500 miles, with no issues, the vehicle can be driven normally.
Change the gear oil every 30,000 miles or sooner if contaminants are introduced or suspected.

2007 - 2018 Jeep Wrangler JK and JKU Suspension Specs

OEM front upper control arm length: 18.750"
OEM front lower control arm length: 22.625"
OEM rear upper control arm length: 17.500"
OEM rear lower control arm length: 19.750"
OEM front sway bar link length: 5.125"
OEM drag link length: ~40.375"

1999 - 2004 Ford Dana 60 Front Axle Details

3.500" OD tubes
Tube wall thickness TBD
35 spline inner axle shafts
30 spline outer axle shafts
9.75" (248 mm) ring gear
10 bolt cover
Ball joint steering
1480 series wheel universal joints
Leaf spring
~37.5" center to center of the spring perches
8X170 mm wheel bolt pattern
Unit bearings