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Spec E46 racing class forum
Official Spec E46 racing class forum.

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Old 04-24-2017, 11:11 AM   #1
BEATO
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Join Date: Jan 2016
Location: New Rochelle, NY
Posts: 8
My Ride: 2001 BMW 330i
Diff build

Hi there. I just bought a Wavetrac LSD and wanted to install but had some questions:

1. Can a shady tree mechanic install it or professional build required? I called Diffsonline and they can do it for a $G (money to be used for seat)

2. Which pumpkin shall I use?
-in car 01 using older style CV joints
or
-Donor pumpkin from Z4 3.0 w/3.46 gears. I do not have any other associated hardware

Thanks
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Old 04-26-2017, 10:48 AM   #2
Greg H
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Join Date: Aug 2014
Location: Reading, PA
Posts: 13
My Ride: 2001 330i
A shade Tree Mechanic can do most of the work:
- I started with a used 3.46 diff.
- Pulled out the original spool. Left the pinion alone.
- Removed the ring gear and installed it on my LSD.
- Took the assembly to a local drive train/machine shop and had them make custom shims for fitment with proper backlash. $200.

Greg Hartman
2001 330i ==> SpecE46
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Old 04-28-2017, 08:25 AM   #3
BEATO
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Join Date: Jan 2016
Location: New Rochelle, NY
Posts: 8
My Ride: 2001 BMW 330i
Thanks! Can I use the pinion in the car with the 3.46 gear in the spare diff? Or they need to match?
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Old 04-30-2017, 07:44 PM   #4
Greg H
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Join Date: Aug 2014
Location: Reading, PA
Posts: 13
My Ride: 2001 330i
Pinion and ring gear need to match. Use the diff with the 3.46 pinion already in it.
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