Thread: M3 LSD in 135i
View Single Post
      03-01-2017, 04:27 PM   #42
Brigadier General
vtl's Avatar

Drives: 2008 BMW 135i MT
Join Date: Apr 2015
Location: Melbourne, Australia

iTrader: (0)

Originally Posted by Brule View Post
What's the benefit of a m3 diff and axles?
Proper locking differential - torque biasing units do not perform at all when the wheel is unloaded (except wavetrac). Have tracked the car quite a few times and you do find unloading the inside rear wheel happens a lot.

Much easier to rebuild - has a bolted ring gear and plenty of aftermarket options. Even the pumpkins aren't that expensive because of the amount of hassle it is to get it to work with non M cars

Axles and propshaft are much more heavy duty. Most 135i/335is came with 'inserted nut' propshaft->diff couplings which is like a tiny CV joint. Have seen plenty of people breaking this style coupling with hard launches. The side shafts are thicker as well.

Custom propshaft needed
The GKN viscolok diff will lose effectiveness as it gets older
Not that much cheaper than the other options

Honestly it was more work than I thought, and not worth the hassle. If I had to do it again, i'd just get a Difflab (QLD) pumpkin and swap out the diff in a weekend
Build Thread | MHD Custom Tune | Agency Power DPs | PE Mod Exhaust | 550i Clutch | Wagner FMIC | M3 LSD | Turbosmart Kompact DVs | M3 Control arms | M3 steering rack | KW Competition Coilovers | Dinan Camber Plates | E92 M3 Front Sway | UUC Trans mounts | Nolathane rear subframe bushings | Alcon 355mm BBK | Yokohama AD08R | Apex EC-7 | Schroth Harness | M3 Steering Wheel | LEDs | CIC + Combox retrofit