Dana 44\30 Rebuild Question

[project74]

Hi all, Currently rebuilding the front and rear axles on my '74 Renegade , ring and pinion are in really good shape but all seals and bearings are done. There is no "crush sleeve" that I am aware of so I am assuming that if I replace all bearings and seals and use the same number of shims and torque to spec that all should be correct...I do have marking compound to check contact on ring and pinion though...any thoughts or advice otherwise would be appreciated.
rear Dana 44 , front Dana 30
Ed

 

[73CJ]

You are right - no crush sleeve.

Keep the shim packs straight and replace away. You should be good to go.

 

[Jimbos76cj]

Before you take off the pinion yoke get a ft/lb torque wrench and see what you preload is. As the bearings break in and wear it will cause less preload, if you tighten the nut back to factory spec you could bring the pinion in to much and mess up the pattern a little. If you retorque it to what it was before you removed the nut it should leave it in the same spot.

 

[project74]

Hey Jimbo...already have nuts off but I did dimple the nut and end of pinion shaft so I could line back up at proper torque range. By the looks of things I dont believe anyone has ever been inside these diffs...bearings and seals were done but the rings pinions look great.
Thanks for the advice.
Ed

 

[73CJ]

Time out guys.

The pinion nuts is torqued to 200-220 ftlbs. Period.

The preload on the pinion is set by the shim pack.

Original (used) break away is 10-20 inlbs

New bearing break away is 15-35 inlbs

With no seal installed, then pull back apart and install the seal.

Sorry Jimbo but done to many of these and FSM specs are burned in my head.

 

[Jimbos76cj]

I missed where he was Replacing the bearing.. Thought it was just the seal. Thanks for the correction. Seals I'll replace myself.. Once the carrier and pinnion get pulled it goes out to my buddy.

 

[project74]

Need some info...dont see in my service book the torque spec for the diff carrier bearing caps...for either the Dana 30 front or the Dana 44 rear?
anybody have those...?
also, the shims that were supplied in the rebuild kits were a little different(outside diamiter) than the ones removed. The olds ones were shot so I sed the new ones and did my best to match up total thickness witht he original packs...ha to take diff carrier back out and remove one thin shim from the pinion inner bearing due to binding but now everything is moving well and marking compound shows get overlap pattern.
Any help with the diff bearing cap torque specs is appreciated.
thanks, Ed

 

[73CJ]

Bearing cap torque is Dana 30 = 35-50. Dana 44 = 70-90. All in ft-lbs.

ODof the shim is not critical as long as it covers the machined load bearing face and does not get in the way and deformed.

Might as well check the backlash while you're in there. .005- .010".

 

[project74]

thanks for the tq. spec 73,
I'm not new to wrenches but this is first diff rebuild for me. The backlash you mentioned, are you referring to the free movement between the pinion gear and ring gear...? and can you give me a quick run-through for the best way to check to spec....again, the Haynes manual I have doesnt seem to mention this in the re-installation notes.
thanks,Ed