Good afternoon I am currently in the process of re- gearing/installing ARB air locker in my 2008 Jk rear Dana 44. I would like to get some input on my gear pattern as this is my first time building a differential. I have found a lot of helpful videos through YouTube @TheBFHGarage and reading on various different forums
Parts that were used in this Install:
New OEM Dana 44 jk non rubicon rear axle
4:10 Dana Spicer Gears NOT the Cheaper Dana SVL gears
Spicer master install kit
ARB RD117 Locker
Yukon Crush Sleeve eliminator
Current Set- up Specs:
Pinion shim (under inner pinion bearing):0.048 in
Crush Sleeve Eliminator shims:0.0120+0.0120+0.0080=0.032+(crush sleeve eliminator which is 0.5150)=0.547 (total thickness)
Pinion Preload: 25 inch lbs with Pinion seal and Oil slinger installed
torqued pinion nut to 225 ft.lbs with red loctite
Carrier Shims
Non Ring Gear side: OE Master shim (0.1270, ARB seal housing, ARB master shim and 0.006 shim stack)
Ring Gear side : OE Master Shim (0.1360, ARB Master shim and 0.014 shim stack
Backlash:0.007
I had tried multiple different setups using new set up bearings changing pinion depth and carrier preload and this is the best pattern I have been able to get. Was curious if anyone else who has setup Spicer OE gears has gotten a pattern similar to this. Not very pretty compared to the Gear pattern chart spicer offers.
I have also been alittle confused on backlash as well. I have heard spicer recommends between 3-5 thou, Yukon says between 6-10 thou but that’s for 5 cut gears. I have had multiple sources tell me 6-10 thou is standard on Jeep jk rear Dana 44 for backlash so not sure what’s best. Originally I had equal shim stacks of 0.010 on each side of carrier but backlash was 0.004 thou so figured that was to tight and moved 0.004 thou to ring gear side to open up backlash.
Wanted to note I am using a differential case spreader as well to install carrier.
Apologize for the long paragraphs just wanted to include as much info as possible.
@hosejockey61
Thank you for your help!
Parts that were used in this Install:
New OEM Dana 44 jk non rubicon rear axle
4:10 Dana Spicer Gears NOT the Cheaper Dana SVL gears
Spicer master install kit
ARB RD117 Locker
Yukon Crush Sleeve eliminator
Current Set- up Specs:
Pinion shim (under inner pinion bearing):0.048 in
Crush Sleeve Eliminator shims:0.0120+0.0120+0.0080=0.032+(crush sleeve eliminator which is 0.5150)=0.547 (total thickness)
Pinion Preload: 25 inch lbs with Pinion seal and Oil slinger installed
torqued pinion nut to 225 ft.lbs with red loctite
Carrier Shims
Non Ring Gear side: OE Master shim (0.1270, ARB seal housing, ARB master shim and 0.006 shim stack)
Ring Gear side : OE Master Shim (0.1360, ARB Master shim and 0.014 shim stack
Backlash:0.007
I had tried multiple different setups using new set up bearings changing pinion depth and carrier preload and this is the best pattern I have been able to get. Was curious if anyone else who has setup Spicer OE gears has gotten a pattern similar to this. Not very pretty compared to the Gear pattern chart spicer offers.
I have also been alittle confused on backlash as well. I have heard spicer recommends between 3-5 thou, Yukon says between 6-10 thou but that’s for 5 cut gears. I have had multiple sources tell me 6-10 thou is standard on Jeep jk rear Dana 44 for backlash so not sure what’s best. Originally I had equal shim stacks of 0.010 on each side of carrier but backlash was 0.004 thou so figured that was to tight and moved 0.004 thou to ring gear side to open up backlash.
Wanted to note I am using a differential case spreader as well to install carrier.
Apologize for the long paragraphs just wanted to include as much info as possible.
@hosejockey61
Thank you for your help!
Last edited:
