Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Norm on March 02, 2012, 02:23:30 PM

Title: Diff rebuild
Post by: Norm on March 02, 2012, 02:23:30 PM: Is it possible to rebuild dana 30 diff at home or is there too many specialised tools required ? Thanks.
Title: Re: Diff rebuild
Post by: MOCAJ on March 02, 2012, 05:53:09 PM: really depends on what tools etc you have in your garage

ask bubba, he has the knowledge and knows what tools are needed :greggmo:
Title: Re: Diff rebuild
Post by: Bulldog67 on March 02, 2012, 05:57:55 PM: :imwitstupid:

and apparently its beyond my capabilities :017:
Title: Re: Diff rebuild
Post by: Delk on March 02, 2012, 06:22:27 PM: If you have the ability to press tricky bearings on and off plus a dial indicator you have a good start. Plus a lot of patience is required the fist time.
Title: Re: Diff rebuild
Post by: scrw on March 03, 2012, 09:47:23 AM: Quote from: Norm on March 02, 2012, 02:23:30 PM
Is it possible to rebuild dana 30 diff at home or is there too many specialised tools required ? Thanks.

Dial gauge & magnetic mount are about the only special tools you need. Oh and maybe some long threaded bar to pull the side bearings in. Other wise a straight forward job which is MUCH easier to do with the axle out.
Title: Re: Diff rebuild
Post by: Bubba on March 03, 2012, 10:03:34 AM: i do them at home
Title: Re: Diff rebuild
Post by: scrw on March 03, 2012, 10:16:49 AM: Yea, but Bubba's garage is the sort of place the A Team always got locked in by the bad guys
Title: Re: Diff rebuild
Post by: Norm on March 03, 2012, 10:56:30 AM: Thanks guys,think I will give it a go. I'll start reading up.
Title: Re: Diff rebuild
Post by: WillCJ on March 04, 2012, 03:13:36 PM: I did both of mine while still in the car, no great problems but I have some experience building diffs in agricultural machinery.
As said, mag mount dial indicator, but also engineers blue or substitute to check pattern and either a rolling torque indicator or fashion up a foot length of bar and a good spring balance to check pre-load, pretty much a must. I did not use an axle spreader, the diff prised out and re-fit Ok, knocked back in with a copper hammer tight but doable, I figured if bit was tight enough when I started, the same when I finished would be OK. Do half-shaft seals while on, give everything a good clean out.
Apart from results must be good, it is a bit suck and see, take shims out one side, in another check and do again, repeat till perfect!
useful links;
http://www.differentials.com/technical-help/installation-instructions (http://www.differentials.com/technical-help/installation-instructions)
http://www2.dana.com/expertforms/depdf.aspx?prod=AXL (http://www2.dana.com/expertforms/depdf.aspx?prod=AXL)
Title: Re: Diff rebuild
Post by: Mike Pavelin on March 04, 2012, 04:48:08 PM: If your just replacing the bearings, assuming it was built right in the first place, as long as you put all the shims back in the same place they came from it will be ok without messing about trying to set it up.
Title: Re: Diff rebuild
Post by: Norm on March 04, 2012, 05:40:32 PM: Its a re-gear so everything is new,so will have to do the full job. Thanks for the help and links guys,much appreciated.I have to change carrier to as its 4.88 gearing and swap auto locker over to so will be a fairly involved job. If I can pull it off it will save a few hundred quid in garage bills.Thanks again. :greggmo:
Title: Re: Diff rebuild
Post by: willo on March 04, 2012, 10:17:11 PM: Quote from: Norm on March 04, 2012, 05:40:32 PM
Its a re-gear so everything is new,so will have to do the full job. Thanks for the help and links guys,much appreciated.I have to change carrier to as its 4.88 gearing and swap auto locker over to so will be a fairly involved job. If I can pull it off it will save a few hundred quid in garage bills.Thanks again. :greggmo:

I have a dana 30 arb in working order for sale for 3.73 and up if you are interested?
Title: Re: Diff rebuild
Post by: Norm on March 05, 2012, 02:40:22 AM: How much ?
Title: Re: Diff rebuild
Post by: willo on March 05, 2012, 08:31:54 AM: Quote from: Norm on March 05, 2012, 02:40:22 AM
How much ?

£350 delivered, not bad seeing as these units are near £1k new
Title: Re: Diff rebuild
Post by: Norm on March 05, 2012, 09:06:27 PM: Tempted,have to have a bean count. :icon_redface: