E85 Z4 diff swap
I recently installed a Mfactory lsd in my E85 3.0, although there are a few threads on installing the lsd in the diff case, there was no guide on a Z4 diff swap that I could find, I had looked high and low on the Internet, so I thought I would post a thread of how i did it, to help those here wanting to install a lsd or simply to change differentials.
I was lucky enough to have a donor diff for the install of the mfactory lsd, so the following is just the diff swap as per topic title.
With several cups of tea and a good old cornish pasty it took me 6.5 hours in total.
Tools:
E12 torx socket x 3/8 drive plus extension & 3/8 x 1/2 drive adapter
13mm hex socket
16mm hex socket
18mm hex socket
21mm hex socket
Torque wrench
Scissor jack
Remove skid pan with aero duct for diff cooling - 8mm hex screws ?ft/lbs
Remove reinforcement plate - 13mm & 16mm nut ?ft/lbs & 2x8mm hex screw from heatshield
Remove pushrod bracket - 18mm nut ?ft/lbs
Remove Exhaust hangers and let it dangle - 13mm nut ?ft/lbs
Remove anti-roll bar - rear bracket 13mm nut & bolt (16 ft lbs), front bracket 13mm nut & bolt. (25 ft lbs)
Remove both pull rod braces - 18mm nut 57 ft-lbs, 13mm bolt 22 ft-lbs
Disconnect the input shaft from the differential - 4 E12 Torx Bolts 61 ft-lbs & disconnect output shafts and tie up withwire/string. Each axle has 6 E12 external Torx bolts 59 ft-lbs
Remove the Differential - Support the differential with a jack. The Differential is held by 3 bolts. 2x18mm bolts in the front & 1x21mm bolt on the rear. Remove the 2 front ones first, then remove the rear one. 18mm Bolts 70 ft-lbs, 21mm Bolt 128ft-lbs
Reversal for install of diff. Where i haven't stated a torque figure i just did them up to what i thought was appropriate because i couldnt find a torque figure online, any help with this would be appreciated.
Any comments or crticism welcome, I just hope this inspires people to do the lsd install as it really makes such a difference to how the car behaves
I recently installed a Mfactory lsd in my E85 3.0, although there are a few threads on installing the lsd in the diff case, there was no guide on a Z4 diff swap that I could find, I had looked high and low on the Internet, so I thought I would post a thread of how i did it, to help those here wanting to install a lsd or simply to change differentials.
I was lucky enough to have a donor diff for the install of the mfactory lsd, so the following is just the diff swap as per topic title.
With several cups of tea and a good old cornish pasty it took me 6.5 hours in total.
Tools:
E12 torx socket x 3/8 drive plus extension & 3/8 x 1/2 drive adapter
13mm hex socket
16mm hex socket
18mm hex socket
21mm hex socket
Torque wrench
Scissor jack
Remove skid pan with aero duct for diff cooling - 8mm hex screws ?ft/lbs
Remove reinforcement plate - 13mm & 16mm nut ?ft/lbs & 2x8mm hex screw from heatshield
Remove pushrod bracket - 18mm nut ?ft/lbs
Remove Exhaust hangers and let it dangle - 13mm nut ?ft/lbs
Remove anti-roll bar - rear bracket 13mm nut & bolt (16 ft lbs), front bracket 13mm nut & bolt. (25 ft lbs)
Remove both pull rod braces - 18mm nut 57 ft-lbs, 13mm bolt 22 ft-lbs
Disconnect the input shaft from the differential - 4 E12 Torx Bolts 61 ft-lbs & disconnect output shafts and tie up withwire/string. Each axle has 6 E12 external Torx bolts 59 ft-lbs
Remove the Differential - Support the differential with a jack. The Differential is held by 3 bolts. 2x18mm bolts in the front & 1x21mm bolt on the rear. Remove the 2 front ones first, then remove the rear one. 18mm Bolts 70 ft-lbs, 21mm Bolt 128ft-lbs
Reversal for install of diff. Where i haven't stated a torque figure i just did them up to what i thought was appropriate because i couldnt find a torque figure online, any help with this would be appreciated.
Any comments or crticism welcome, I just hope this inspires people to do the lsd install as it really makes such a difference to how the car behaves
