[Cybertronic]

I'm having a wavetrac diff built up for me at Diffsonline.
I've done business with Dan in the past so I can vouch for them and their customer service and quality.

The price and only 30% lock of the M-Perf diff wasn't compelling to me. So I contacted them asking if they had a solution for the M235's. Dan had to do some homework with his BMW motorsport contacts, because our Diff isn't shared by any other models. He was able to figure something out pretty quick, and recommended a wavetrac type diff, which I think will work perfect for our torquey beast :-)
I'll post a review as soon as its installed on the car.

[vinny84]

Nice! I'll be waiting for the review.

Is it a clutch type differential? Not familiar with Wavetrac diffs

[F80_M]

Don't mind me asking but what's the price of it being built?

[Roshi]

I contacted Quaife a while back about their option for the 235. can't find the email but theirs was around $1300 for pumpkin plus $750 for the machine work (welded ring gear or something like that). and a 3 week downtime.

[leesat]

I believe those two diffs(M and wavetrac) are different type.

[Discover]

Originally Posted by Roshi

and a 3 week downtime.

[PeterPure]

Does wavetrac has a default offering for m235i?

[Cybertronic]

Correct, the M-Diff is a traditional clutch pack setup.
The wavetrac is a helical gear type. Variable lock
http://www.wavetrac.net/

I cant really speak about pricing, but Dan did say he was going to put together something competitive. So if you are interested just contact him. (They can also do a lot of custom things for each build... different ratios, ramps, polish ring/pinion, etc...)

[Cybertronic]

Originally Posted by Darkhold

Does wavetrac has a default offering for m235i?

I'm sure the actual gear part is the same as some of the other BMW applications, but since we have a ring gear that is factory welded, some machining does need to be done for an install.

The nice thing about getting from Diffsonline, is they build it all up using a new M235i diff. They send it to you, install the new one, and then send your old one back. So no downtime except for the bolt up time.

[Bee Pee]

Originally Posted by Roshi

I contacted Quaife a while back about their option for the 235. can't find the email but theirs was around $1300 for pumpkin plus $750 for the machine work (welded ring gear or something like that). and a 3 week downtime.

I have quaife on my m135i AT along with H&R springs and uprated sway bars.

Car rides well, handles like its on rails and traction everywhere

[HP Autosport]

Originally Posted by Roshi

I contacted Quaife a while back about their option for the 235. can't find the email but theirs was around $1300 for pumpkin plus $750 for the machine work (welded ring gear or something like that). and a 3 week downtime.

Quaife has been available for a while now. There is now down time with your car.

http://www.2addicts.com/forums/showthread.php?t=979498

[HP Autosport]

Originally Posted by Darkhold

Does wavetrac has a default offering for m235i?

Yes, Wavetrac can be built as well.

[dharo1]

Keep up posted. I'm interested in lsd but I've been waiting for more reviews before I take that route.

[HP Autosport]

Originally Posted by dharo1

Keep up posted. I'm interested in lsd but I've been waiting for more reviews before I take that route.

PM this gentleman:

http://www.2addicts.com/forums/showp...7&postcount=10

[PeterPure]

Originally Posted by HP Autosport

Yes, Wavetrac can be built as well.

Could you pm me a price quote for the wavetrac diff for m235i?

[boost82]

Op, I had a wavetrac diff on a gti I had and it was awesome, you are going to love it. I had 400whp to the wheels on a fwd car and with the wavetrac it was manageable.

I got the m diff port installed, kinda annoys me though. Any BMW with a M badge should not be a open diff car, period.

[radioflyer]

I would like a quote as well.

[s2ktan]

Originally Posted by radioflyer

I would like a quote as well.

Me too.

[Cybertronic]

Email dan@diffsonline.com
I already got mine...just need to find a weekend to install it now!

[boost82]

^awesome. Post up some pics of it and the install if you can...

[2fast4utoo!]

Keep us updated please!!

[HP Autosport]

Originally Posted by Darkhold

Could you pm me a price quote for the wavetrac diff for m235i?

Sent you all PM's.