[Maestro]

I figure I would get some options on this before I do the repair myself. I believe I know what is happening but want to see what others thought.

Here is the situation I have an MT 07 335I with 86K miles, most of those miles are local daily commute. Over the last few weeks I have notice when I get on the gas the car was not responding, almost like turbo lag. I was on the highway in traffic each time and trying to pull out to pass someone and I would get on the gas and nothing then all of sudden the car took off like normal. Never had this happen before nor have I noticed ti during my daily commute which is mostly back roads.

Because of all the traffic on the road I was not paying too much attention to the gauges and such and did not have time to trouble shoot it, until this past weekend. I was on a long trip and every time I attempted to pass someone I kept getting the lag, I was also running cruise the entire time and when I jump on the gas then lag would happen the car would come out of cruise control and would not allow me to reengage it.

What I notice was any time I was in 5th or 6th gear and I jump on the gas the RPMs would jump from 2500/3000 RPMs up to 4000 RPM then settle back to 2500 and then car would start accelerating like normal.

I think it is time for a clutch, however, I not seeing any slipping occurring in the lower gears as one would expect. I driven MT a long time and ever time the clutch was going you had a hard time just getting the car moving from a stand still. The other thing that is confusing is the fact that the Cruise control disengages, and it will not reengage, I actually have to push the level down in the off position a couple of time before it will allow me to reengage it.

Any thought or ideas, and if it is in fact the clutch what are people recommendation, since I would like to do it myself but rather wait till spring to do the work, do you think it will late that long.

[e90Mark]

That really sounds like clutch slip. Clutch slip makes it hard in general to accelerate, based on how far gone the clutch is, whether from a stop or moving.

The fact that you tried to accelerate in a high gear, 5th/6th, and got the slip is a good indicator that the clutch is on its way out.

[evoix]

Sounds like you need a new clutch. THe clutch can still grab at lower rpms but is slipping in the higher power range. Do not beat on the car or you could damage more transmission components.

I drove my srt4 for four month with clutch slip daily and then one day it didn't go into first because the clutch wouldnt engage. TOWED AWAY!!

[Maestro]

I Drove it more today and found that when the RPM spike like they do it disengages the cruise control and the only way to clear it and allow it to reengage is to press the clutch and change gears. It must be some sort of safety precaution.

Also, I can get it to slip on lower gears, as well so I am convince it time for a new clutch, now I need to decide whether to stay with stock of upgrade, and I been wanted to do the CDV delete, and it is probably a good time to do that as well and I just read that the M3 version fits and is not as restrictive as the factory original.

When I done clutches in the past I replace or resurface the flywheel and usually replace the throw-out bearing. What is everyone thoughts on this.

Here is a good video for this... Damn you have to remove the exhaust and lots of other things just get the tranny out and you need a special clutch alignment tool from BMW.