Pinon nut torque spec for TJ dana30?

[CaptainMorgan]

Anyone? Thanks.

[neZZr]

SPECIFICATIONS - 181FBI
AXLE SPECIFICATIONS DESCRIPTION SPECIFICATION
Axle Ratio 3.07, 3.73
Ring Gear Backlash 0.12-0.20 mm (0.005-0.008 in.)
Pinion Bearing Preload - Original Bearings 1.13-2.26 N·m (10-20 in. lbs.)
Pinion Bearing Preload - New Bearings 2-3.4 N·m (15-30 in. lbs.)

TORQUE SPECIFICATIONS DESCRIPTION N·m Ft. Lbs. In. Lbs.
Fill Hole Plug 34 25 -
Differential Cover Bolts 41 30 -
Bearing Cap Bolts 61 45 -
Ring Gear Bolts 108 80 -
Pinion Bearing Nut Min - Max 217 - 678 160 - 500 -
Axle Nut 237 175 -
Hub Bearing Bolts 102 75 -

[CaptainMorgan]

thanks

[neZZr]

No prob

[danno]

Captain,

Just remember that the Dana 30 (TJ version at least) uses a crush sleeve for bearing pre-load. This means that simply tightening it down at the torque spec will not do it...

You need to get a new crush sleeve which goes between the inner and outer bearings on the pinion and tighten it until the pinion takes 10-20 in. lbs. to turn for used bearings and 15-30 in. lbs. to turn for new bearings. You will want to lift it off of the ground and remove the tires to get the readings right... The lower side of the range usually is if there is no ring gear/carrier in the housing and the higher side of the range is if the is a ring gear/carrier/axleshafts in the housing.

Be careful, if you tighten down the pinion using the torque spec, you have the possibility of over tightening the pinion, which could gall the bearings and cause them to seize... I have seen a pinion bearing set seize on the road before... Basically the tires lock up.

Just a little advice... If you already knew this stuff, well... Maybe someone else will learn :)

[CaptainMorgan]

I kind of knew this stuff, but I didnt realize I could ruin the crush sleeve. I haven't touched it yet, are you sure I need a new sleeve? Couldn't I re-set everything with the current sleve? If not that is fine, I just want to know because this seems like it could be really simple or I will have to take my Jeep to the shop and miss my trip this weekend. I think I will take it in and see what they say. Who knows, maybe they can fix it quick.

[neZZr]

You definitely want a new crush sleeve. They are not meant to be reused.

[ademster]

Not true, it depends on what you are doing morgan..


What are you replacing? the pinion Seal?


If so pop it off... and put it back on until it stops, and then just a touch more. but not a lot not even a 1/8 of a turn... you'll be fine.

[Fire Ball]

A crush sleeve cannot be UN- crushed but if the preload on the sleeve still works, you could get by with using the same one. You'll know if you are up against the crush sleeve by the torque required to load the bearing. If the pre load is set and the nut is still turning relatively easy, the crush sleeve needs to be replaced.

Hopefully the nut just came loose and the same sleeve will work.


Now all that being said, if it was mine, I would just get a new one and start over.

You really should take it apart and look all the bearings and races over real good any way.

[CaptainMorgan]

I'm taking it to the shop tommorow morning. They are going to tighten it all abck up for free. I had it all apart, torque wrench in hand when I decided I would just let them deal with it. Hopefully the bearings and everything are fine, and I hope they check.

[ademster]

He wouldnt really be able to set the pre-load, he doesnt have the proper tools to do so...


Morgan, if you want you can take it to Anthony at Ascot Automotive, where I used to work... I will call him tomorrow and tell him you need a hand, He will be more then willing to have a quick look for you... let me know if thats what you want to do... I will pm you my new cell number.. and give his cell number.

[Easyover]

Just FYI, CJ D30s use shims to adjust pinion bearing preload as do HP YJ's, not a crush sleeve. Pinion nut is to be torqued to 200-220 ft. lbs.

ZJ's and TJ's D30 used a crush sleeve