[MarkDemma]

Originally Posted by stevenvillatoro

Here's some potentially good news, since we're approaching the end of the year. Last year, BMW put the LSD on sale for 50% off during its holiday promotions.

If BMW repeats that promotion, it'd be heck of a nice savings.

I saw that last year and was hoping that they would do it again this year

[WolfGTI]

It does remove some of the squirelly feel - The other part is subframe bushings.

Originally Posted by Taskmaster

Does it take care of the rear end shimmy and shake?

[XutvJet]

Originally Posted by MarkDemma

I saw that last year and was hoping that they would do it again this year

I wouldn't hold my breath. That Christmas deal was only for the auto MP LSD and I believe it was on sale for $1,500, not a $1,000.

[stevenvillatoro]

Originally Posted by XutvJet

That Christmas deal was only for the auto MP LSD and I believe it was on sale for $1,500, not a $1,000.

I thought it was $1,250, marked down from $2,500. :

[RotorOver]

Originally Posted by Texan2er

Lot of good info! Interested if I can find someone local who has the M Performance diff to see how it feels compared to the mechanicals I've had before. Did you order yours with the M Perf diff and then swap, or straight to what you have now?

Got the car off the lot with the standard open diff and added the LSD later.

[M235ForNow]

Originally Posted by stevenvillatoro

I thought it was $1,250, marked down from $2,500. :

Well, I can tell you the retail price of having the MP LSD installed at the port for my car was $3240. And I guess it does alleviate rear end issues as I've not noticed anything untoward with my car. But perhaps I'm not driving it as aggressively as others in the forum.

[Taskmaster]

Readjusted my tire pressures - It was reading 38 in the rear and about 32 in the front after my commute. I assumed it was because I was driving about 35 miles and when it cooled down, it would be more in range.

It was not.

I dropped it down to 31 Rear and 31 Front, and the rear end is so much more planted - it's awesome. I also noted that fuel economy went up (surprisingly) and warm temps PSI pretty much hovered around where the cold temps PSI were (32 R 31 F)


Check your tire pressure gents.

[Lew Carrum]

Contrary to what some people say these cars are not softly sprung but oversprung and underdamped, with the rebound at the rear barely controllable with the standard set up. I recently fitted the Bilstein B12 kit and it has really improved the cars behaviour, no bouncing or swaying about and a better power delivery grip from the rear end meaning the squirming feeling has gone and the traction control kicks in less too. I am now very happy with the car.

[Texan2er]

Originally Posted by XutvJet

I wouldn't hold my breath. That Christmas deal was only for the auto MP LSD and I believe it was on sale for $1,500, not a $1,000.

Rats. I guess I'll just have to suffer with my ZF and take advantage of a deal like that for all the other poor fellas with a manual instead of an auto. Wouldn't want a sale to go unused!

[Texan2er]

Originally Posted by Taskmaster

Readjusted my tire pressures - It was reading 38 in the rear and about 32 in the front after my commute. I assumed it was because I was driving about 35 miles and when it cooled down, it would be more in range.

It was not.

I dropped it down to 31 Rear and 31 Front, and the rear end is so much more planted - it's awesome. I also noted that fuel economy went up (surprisingly) and warm temps pretty much hovered around where the cold temps were (32 R 31 F)


Check your tire pressure gents.

You have the staggered MPSS setup? I'm still running 32 front and 36 rear warm currently.

[Taskmaster]

Originally Posted by Texan2er

You have the staggered MPSS setup? I'm still running 32 front and 36 rear warm currently.

It's staggered, and they are BMW Wheels (no idea they type or actual size until I take them off)

but 225/18 and 245/18 - 32PSI is recommend for both.

[Texan2er]

Originally Posted by Taskmaster

It's staggered, and they are BMW Wheels (no idea they type or actual size until I take them off)

but 225/18 and 245/18 - 32PSI is recommend for both.

Gotcha. I have been following BMW's listed recommended front and rear pressures, may see how this changes up the ride though.

[Taskmaster]

Originally Posted by Texan2er

Gotcha. I have been following BMW's listed recommended front and rear pressures, may see how this changes up the ride though.

You sure? I checked the door jam and then looked up the tires/Wheels and that's what I came up with. But give it a shot!

[XutvJet]

The door jam on my 2016 M235 states 33psi for the fronts and 38psi for the rears on the staggered MPSS setup.

I've experimented with all sorts of tire pressures over my 2.5 years of ownership and find the recommended pressures to deliver the best ride and performance.

[Taskmaster]

Originally Posted by XutvJet

The door jam on my 2016 M235 states 33psi for the fronts and 38psi for the rears on the staggered MPSS setup.

I've experimented with all sorts of tire pressures over my 2.5 years of ownership and find the recommended pressures to deliver the best ride and performance.

That explains it- I’m not running runflats.

[XutvJet]

Originally Posted by Taskmaster

That explains it- I’m not running runflats.

Neither am I. I run Michelin Pilot Super Sports (MPSS) and that's the way I ordered the car. It's odd that your door jam says 32psi on both axles. M235s that were equipped with runflats get a square 225/40R18 setups with 18X7.5 rims at all four corners. The MPSS equpped cars get staggered tires 225/40R18 front and 245/35R18 rear with 18X7.5 in the front and 18X8 in the back.

Are you sure that your M235 was equipped with staggered tires as stock and not runflats? We do know that people have squeezed 245/35R18 on the 7.5" wide rims even though it's not recommended by the tire manufacturers. The wheel width is stamped on the backside of the spokes.

[XutvJet]

Originally Posted by Lew Carrum

Contrary to what some people say these cars are not softly sprung but oversprung and underdamped, with the rebound at the rear barely controllable with the standard set up. I recently fitted the Bilstein B12 kit and it has really improved the cars behaviour, no bouncing or swaying about and a better power delivery grip from the rear end meaning the squirming feeling has gone and the traction control kicks in less too. I am now very happy with the car.

I wish we had the factory spring rates available. For us M235/240 owners in the US, swapping on a coil over setup like yours isn't an easy or cheap thing to do because we have to deal with the active damper programming. Believe me, if I could have ordered the car without the adaptive dampers, I would have. I agree too, the dampers are certainly are some of the problem. With that said, I'm going to take a risk and swap on the higher rate Dinan springs in the rear only. Install is a breeze as well. Fingers are crossed.

[Taskmaster]

Originally Posted by XutvJet

I wouldn't hold my breath. That Christmas deal was only for the auto MP LSD and I believe it was on sale for $1,500, not a $1,000.

Originally Posted by stevenvillatoro

I thought it was $1,250, marked down from $2,500. :

It's steal anywhere under $1750. My understanding is the book rate for install is actually just 2.5hrs. Also, I looked it up, I don't see a distinction between the manual and auto diff.

[XutvJet]

Originally Posted by Taskmaster

It's steal anywhere under $1750. My understanding is the book rate for install is actually just 2.5hrs. Also, I looked it up, I don't see a distinction between the manual and auto diff.

Yeah, BMW's literature says 2.5 hours or "FRUs" but no BMW dealership will honor it as the FRUs are "warranty hours". BMW's book time on the LSD install is 3.5 hours. Still pretty reasonable, all things considered.

And yes, you're right, both the M235 auto and 6MT have the same 3.08 final drive and LSD options. It was the M240 which has a different final drive between the 6MT (3.08) and auto (2.8X). The crazy sale for the MP LSD last Christmas was for the auto M240 LSD though some people were able to get BMW to honor the same sale for the 6MT version. I couldn't get BMW to do it.

The MP LSD is a really pricey piece, all things considered, but the quality of the unit and the way it transforms the car is impressive. For me, the $2,500 installed price was worth it.

[Taskmaster]

Originally Posted by XutvJet

I wish we had the factory spring rates available. For us M235/240 owners in the US, swapping on a coil over setup like yours isn't an easy or cheap thing to do because we have to deal with the active damper programming. Believe me, if I could have ordered the car without the adaptive dampers, I would have. I agree too, the dampers are certainly are some of the problem. With that said, I'm going to take a risk and swap on the higher rate Dinan springs in the rear only. Install is a breeze as well. Fingers are crossed.

Well to be fair, my door jam says the same as yours, but my car is running aftermarket wheels and tires, and the pressures are the tire manufactures recommend PSI. Since I dropped it down, there is more grip, less sway and the car seems to get better gas mileage as well.

However, I heard (from a search ) that some people do have the door jam sticker that says 32/32

[Texan2er]

Originally Posted by XutvJet

Neither am I. I run Michelin Pilot Super Sports (MPSS) and that's the way I ordered the car. It's odd that your door jam says 32psi on both axles. M235s that were equipped with runflats get a square 225/40R18 setups with 18X7.5 rims at all four corners. The MPSS equpped cars get staggered tires 225/40R18 front and 245/35R18 rear with 18X7.5 in the front and 18X8 in the back.

Are you sure that your M235 was equipped with staggered tires as stock and not runflats? We do know that people have squeezed 245/35R18 on the 7.5" wide rims even though it's not recommended by the tire manufacturers. The wheel width is stamped on the backside of the spokes.

See, that's what I thought. I would check your build on BMW USA website Taskmaster for what your stock setup was. If you had the MPSS setup stock, you will have a "Increased top speed limiter" option.

[M235ForNow]

Originally Posted by Taskmaster

Readjusted my tire pressures - It was reading 38 in the rear and about 32 in the front after my commute. I assumed it was because I was driving about 35 miles and when it cooled down, it would be more in range.

It was not.

I dropped it down to 31 Rear and 31 Front, and the rear end is so much more planted - it's awesome. I also noted that fuel economy went up (surprisingly) and warm temps PSI pretty much hovered around where the cold temps PSI were (32 R 31 F)


Check your tire pressure gents.

My non-runflats are called out as 33 front, 38 rear on the door panel.