[dradernh]

Originally Posted by bdumonte

I want to add to my m240xi. Anyone provide part number for 2017 automatic xDrive? Seattle dealer told me they don’t work on xDrive and won’t install so any shop recos in WA would help too.

I recommend you contact Dan at diffsonline. If there are one or more LSDs that will work with your xDrive, he'll know which they are: https://diffsonline.com/.

[ckosiek]

OP (and anyone else who had this done at a dealer):
Did you ask - or did the dealer offer - to let you have the OEM open diff back, or did they just keep it?
Thanks.
Charlie

[Outlaw 06]

Originally Posted by ckosiek

OP (and anyone else who had this done at a dealer):
Did you ask - or did the dealer offer - to let you have the OEM open diff back, or did they just keep it?
Thanks.
Charlie

I asked for the (open) ediff back, and it's currently on my garage floor annoying my wife..

[PeterWT]

Originally Posted by ckosiek

OP (and anyone else who had this done at a dealer):
Did you ask - or did the dealer offer - to let you have the OEM open diff back, or did they just keep it?
Thanks.
Charlie

I got mine back, in the box that the new one came in. It's been sitting in my garage, taking up space since then.

[freakystyly]

*Cries in Canadian dollars

https://shop.bmw.ca/p/BMW__/BMW-M-Pe...108659987.html

Looking at $6k for the diff alone, and that's not the exchange rate talking.

Yeah I think a call across the border to diffsonline is the way to go pretty soon.

[stylinexpat]

Surprised no LSD option for M240i XDrive models. Would have thought rear diff would be the same. Rear,middle and front could create a good WRX competitor

[blkreaper]

I still cant believe these cars come without LSD

[dradernh]

Originally Posted by blkreaper

I still cant believe these cars come without LSD

BMW made the M2 for the buyer who wants his 2 Series car to come with an LSD already installed.

We, OTOH, don't pay for one in the purchase price and get to choose from a variety of available LSDs.

[PeterWT]

I would have gladly paid 1500-2000 USD more for the car if it came with the MP LSD from the factory, or was available as a factory installed option.

[Outlaw 06]

Originally Posted by PeterWT

I would have gladly paid 1500-2000 USD more for the car if it came with the MP LSD from the factory, or was available as a factory installed option.

Agreed.

BMW already manufactures a LSD for this car (P/N 33-10-8-659-987), so it would be simple for BMW to offer the LSD as a factory-installed option. It's even simpler than offering two transmission options for the car.

[dradernh]

Originally Posted by Outlaw 06

BMW already manufactures a LSD for this car (P/N 33-10-8-659-987), so it would be simple for BMW to offer the LSD as a factory-installed option. It's even simpler than offering two transmission options for the car.

It's only a guess, but I'm inclined to think the take rate for an optional LSD in the 2 Series would have been very low; say, like in the low-hundreds.

My guess would be 319 +/- 50. BMW must have considered offering the option; it would be interesting to find out the rate at which the company thought it would sell.

If I'd ordered my car and the option had been available, I would have added it to my order. I've got no complaints about having bought the Wavetrac, though.

[GoldenWest]

After test driving and reading equipment specs for 230i and 240i, the BMW data I recall indicated the 240i had a limited slip. Is this incorrect?
IÂ’ve often thought of installing a limited slip. Since ordering and receiving my 2020 230i manual trans, I installed the Dinantronics X tuner and solid aluminum turbo discharge pipe.
I replaced the stock plastic & rubber rear subframe bushings with Turner Motorsports solid aluminum bushings (with no ride compromise).
At the time of bushings install a 19mm Dinan rear anti roll bar was fitted. Those two items vastly transformed turn in, cornering & directional stability, steering accuracy and rear wheel grip. Loss of rear wheel grip is far reduced with on-off power application in transient maneuvers and cornering. High speed control and road feel is much more predictable.
Has anyone adding a limited slip upgraded any rear suspension components?

[dradernh]

Originally Posted by GoldenWest

After test driving and reading equipment specs for 230i and 240i, the BMW data I recall indicated the 240i had a limited slip. Is this incorrect?

Has anyone adding a limited slip upgraded any rear suspension components?

Yes, that is incorrect.

I had Turner's aluminum subframe bushings installed at the time I had an LSD installed. I also had Koni double-adjustable rear shocks installed, along with 600# rear springs.

[SpencerC_6MT]

Originally Posted by dradernh

Yes, that is incorrect.

I had Turner's aluminum subframe bushings installed at the time I had an LSD installed. I also had Koni double-adjustable rear shocks installed, along with 600# rear springs.

I get pretty nasty axle hop with 1st gear wheelspin, especially in the rain. Is this solved with stronger subframe bushings? I couldn't imagine any other significant advantage to aluminum bushings.

[dradernh]

Originally Posted by SpencerC_6MT

I get pretty nasty axle hop with 1st gear wheelspin, especially in the rain. Is this solved with stronger subframe bushings? I couldn't imagine any other significant advantage to aluminum bushings.

I don't know if it's entirely solved, but it's one reason to install stiffer bushings.

Turner doesn't appear to offer the solid bushings anymore, but they do still offer the Delrin/aluminum set of bushings: https://www.turnermotorsport.com/p-4...4-f32-f33-f36/.

From that page:

Performance Benefits:

• Eliminates subframe movement for more direct throttle and suspension response.
• Minimizes wheel hop due to subframe deflection and movement.

[WolfGTI]

AKG still offers them :
https://www.akgmotorsport.com/produc...BoCB_YQAvD_BwE

Originally Posted by dradernh

I don't know if it's entirely solved, but it's one reason to install stiffer bushings.

Turner doesn't appear to offer the solid bushings anymore, but they do still offer the Delrin/aluminum set of bushings: https://www.turnermotorsport.com/p-4...4-f32-f33-f36/.

From that page:

Performance Benefits:

• Eliminates subframe movement for more direct throttle and suspension response.
• Minimizes wheel hop due to subframe deflection and movement.

[GoldenWest]

That’s unfortunate bushings are not longer being made. I’m curious why. Mine were just ordered in Dec of ‘21 from ECS, Turner’s parent company. No longer available from them either. Appears they’ve replaced it with aluminum + Delrin sleeve design. The Turner part # I ordered was 021450TMS01.
Former all aluminum bushings (and subframe), and current Delrin style attached.

[dradernh]

Originally Posted by GoldenWest

That’s unfortunate bushings are not longer being made. I’m curious why.

I can't imagine Turner sold very many sets of them. But, as Mendra points out, AKG is still selling a set of solid bushings.

My view is that they're something that would normally go into a track car or a race car, and there are few of those among non-M 2 Series and 3 Series owners in this era.

[GoldenWest]

I think the perceived result with solid bushings compromised ride and comfort. As I mentioned, there is absolutely no compromise or increased noise, vibration or harshness (NVH) with Turner Motorsports solid aluminum bushings, which only serve to keep the rear end infinitely more planted. They also vastly improved gas on-gas off rear end stability in straight line acceleration and transient maneuvers.
I thoroughly scoured forums and input from those who pulled the trigger before ordering. They (surprisingly) confirmed only upside, with no downside. In fact, increased stiffness came from the 3 way adjustable Dinan rear bar, not the bushings. In position #1, the car’s ride feels stock. Going up incrementally, I feel increased rear suspension stiffness and quicker, more direct turn in.

[ferraricare]

I have just ordered a M Performance differential for my 2015 M235i and these posts have me thinking about what else I should be looking at when I make the swap: anyone have any feedback on the numerous rear bushing inserts, both subframe and differential bushings?

[dradernh]

Originally Posted by ferraricare

I have just ordered a M Performance differential for my 2015 M235i and these posts have me thinking about what else I should be looking at when I make the swap: anyone have any feedback on the numerous rear bushing inserts, both subframe and differential bushings?

I've experienced no downsides to having installed the NLA Turner solid aluminum rear subframe bushings in my car. They went in during the LSD installation.

[PaleoMan]

Great place to go to. I've been going there for about 20 years and have been very pleased.

Dan and Dave really do great work, have fair prices, and know BMWs inside and out. They get everyone from track addicts to daily drivers. Dave races, so is keenly aware of performance and BMWs.

The are big supporters of the BMW Car Club as well.

I highly recommend them.

For my 2015 F22, I had the LSD added as a port option, when I bought it.