Custom driveshaft shop near Boston / Central MA?

zero2sixtyZ · 09-02-2022, 12:37 PM

Looking for a shop to do a custom driveshaft for the E9x M diff swap, the two halves (non-M + M rear half) welded and balanced... anyone have a good recommendation / experience locally? Thanks in advance

dave96dcm · 09-10-2022, 09:33 PM

http://mitchelldifferential.com/

whyzee125 · 09-10-2022, 09:54 PM

I would recommend sending it off for balancing. I dont know about that particular shop, but I know that many shops cannot do high speed balancing and you'll then have vibrations.

I'm by no means a driveshaft expert and I also live in the south where nobody can do anything right but despite what a lot of shops seem to say about "balanced is balanced at any speed", that doesn't seem to be true and there are only a few places in the states that can do high speed balancing. There are two trains of thought:

1) if it's balanced at 3,000 rpm it's balanced at 10,000 rpm
2) there are certain resonances that can happen at different rpms requiring high speed balancing

I'm in the second camp, but it could just be that every shop in my area is completely incompetent (which wouldn't surprise me at all) lol

09-02-2022, 12:37 PM	#1
zero2sixtyZ Colonel 1040 Rep 2,725 Posts Drives: e92 + f15 Join Date: Jan 2012 Location: Cambridge, MA iTrader: (4) Garage List 2015 X5 xdrive50i [10.00] 2007 335i Coupe [9.62]	Custom driveshaft shop near Boston / Central MA? Looking for a shop to do a custom driveshaft for the E9x M diff swap, the two halves (non-M + M rear half) welded and balanced... anyone have a good recommendation / experience locally? Thanks in advance
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09-10-2022, 09:33 PM	#2
dave96dcm First Lieutenant 33 Rep 355 Posts Drives: Many Join Date: Jan 2008 Location: Gardner, MA iTrader: (0)	http://mitchelldifferential.com/
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09-10-2022, 09:54 PM	#3
whyzee125 Brigadier General 1995 Rep 4,028 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	I would recommend sending it off for balancing. I dont know about that particular shop, but I know that many shops cannot do high speed balancing and you'll then have vibrations. I'm by no means a driveshaft expert and I also live in the south where nobody can do anything right but despite what a lot of shops seem to say about "balanced is balanced at any speed", that doesn't seem to be true and there are only a few places in the states that can do high speed balancing. There are two trains of thought: 1) if it's balanced at 3,000 rpm it's balanced at 10,000 rpm 2) there are certain resonances that can happen at different rpms requiring high speed balancing I'm in the second camp, but it could just be that every shop in my area is completely incompetent (which wouldn't surprise me at all) lol
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