Member Since: 30 Mar 2022
Location: Texas
Posts: 5
Rear diff rebuild - looking for torque specs
Hi!
I'm putting in an ARB air locker and can't find torque specs for:
- ring gear bolts
- case bolts
Any info greatly appreciated.
26th Jan 2023 2:39 am
pwheeldon
Member Since: 15 Jan 2020
Location: West Yorks
Posts: 1446
I'm sorry I can't help, but I'd be interested to hear how you get on with it as it's something I'm thinking of doing.Discovery 4 GS 2009 Auto Stornoway Grey
Discovery 3 s 2005 Auto Bonatti Grey Gone
Discovery 3 SE 2005 Manual Zambezi Silver Gone
Range Rover Sport HSE 2006 Black
Aston Martin DB7 VV
26th Jan 2023 2:48 pm
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4400
If you put an air locker in the rear axle, do you have to disable the traction control?Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
26th Jan 2023 2:58 pm
four
Member Since: 30 Mar 2022
Location: Texas
Posts: 5
Nope. Traction control simply works less. Same idea as the HD models with the electronic rear locker.
There are YouTube videos comparing the Disco 3 locked rear vs not if you want to check them out
26th Jan 2023 11:55 pm
four
Member Since: 30 Mar 2022
Location: Texas
Posts: 5
Hi pwheeldon,
So far so good. Though the amount of info available is seemingly nonexistent.
I measured backlash off the pinion shaft before I took the old one apart to have something to match to. With the pinion in good shape, I decided to leave it be so I wouldn't have to mess with pinion depth. Good thing as shims are hard to come by over here.
With it back together, the backlash is much smaller. The ARB kit came with cover-side carrier bearing shims, but not case side which I need to add backlash. So, I have Dana 35 shims arriving tomorrow which I'm hoping will be close enough in diameter, otherwise I'll be ordering from the UK - easier for you
27th Jan 2023 12:11 am
pwheeldon
Member Since: 15 Jan 2020
Location: West Yorks
Posts: 1446
I think I'm going to have to start doing some YouTube research duff rebuilds and air lockers on other cars, as pretty nothing made any sense to me! I know shims and pinions are, but no idea how they relate to the diff. Its nice to have something to learn, I guess!Discovery 4 GS 2009 Auto Stornoway Grey
Discovery 3 s 2005 Auto Bonatti Grey Gone
Discovery 3 SE 2005 Manual Zambezi Silver Gone
Range Rover Sport HSE 2006 Black
Aston Martin DB7 VV
27th Jan 2023 12:44 am
four
Member Since: 30 Mar 2022
Location: Texas
Posts: 5
Take a look at the instructions. It's detailed enough to give you a good idea what you're in for
Member Since: 15 Jan 2020
Location: West Yorks
Posts: 1446
CheersDiscovery 4 GS 2009 Auto Stornoway Grey
Discovery 3 s 2005 Auto Bonatti Grey Gone
Discovery 3 SE 2005 Manual Zambezi Silver Gone
Range Rover Sport HSE 2006 Black
Aston Martin DB7 VV
27th Jan 2023 9:40 am
four
Member Since: 30 Mar 2022
Location: Texas
Posts: 5
Use at your own risk
Case bolts are M12 10.9 standard thread, so I used 85 ft/lbs
The ring bolts are M12 12.9 fine thread, so I went with 120ft/lbs and red high-temp thread locker
With the case back together and shims providing preload, I measure 25 ft/lbs of rotational torque at the pinion.
Be sure to test the air locker to ensure it holds pressure. I twisted the square section o-ring on the first go round and it would not lock or hold pressure. So glad to figure that out before putting it all back together.
Tomorrow, I'll install the axles along with a new driveline (old one had play). Hopefully Larry the LR3 will be back on the road
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