perfectlap

The RMS-phobia has me second guessing my shifting style. Anyone with a manual trans. who has had RMS issues care to shed any light on ways they adjusted their shfiting after the seal was replaced?

washington dc porsche

I haven't changed my shifting, am I supposed to?

TD in DC

I seriously doubt there is any relationship between the two. In any event, you should be gentle when you shift, and NEVER jam the car into gear. Keep in mind that the Porsche shifter is self-centering. As such, when upshifting, you can use the palm of your hand to push the shifter out of gear, the shifter will center itself, and then you can use the palm of your hand to push the shifter into the proper gear, which will be easy to find since the shifter is centered. After a little practice, you will be able to do this so quickly and smoothly that nobody will notice what you did, including yourself. This technique also reduces the chance that you will engage in a "money $hift," which is much easier to do if you try to shift directly between gears. You are much more likely to shift from 5 into 2 if you are trying to shift directly between gears than if you shift from 5 into neutral and then straight back into 4th.

gravedgr

I tend to have to use a little force to get into 1st on cold days when the car has been sitting. That or clutch slip.

perfectlap

no correlation eh?

so its more do with the mechanism and not the actual shifting style?

TD in DC

I'm no expert, but I really think shifting style has a much greater impact on your syncros and transmission than on your RMS. With respect to downshifting, heel and toeing with rev matching, although not necessary for cars with syncros like ours, is easier on your car.

jb26jb

Sitting at a light with the clutch in can't help the RMS but that's all I can think of.

Robin 993DX

Maybe you were asking when to shift? What RPM instead how to shift? I doubt the shifting style have anything to do with the RMS, now on the other hand. What RPM you shift and how long you hold the RPM before you shift may have something to do with RMS..... As RMS is crank shaft related.

From my own experience I do know that RMS is related to crankcase pressure.... As I had several drops of leak after a long trip on a overfilled crank case.

perfectlap

please expound on where to shift and how long to hold before releasing the clutch in the "saving the RMS" (possibly) crusade.

jb26jb

My understanding is that the way the 996 is set up, when the clutch is depressed a lot of weight sits on the end of the crank which would put pressure on the last seal on the crank "the RMS" when the clutch is engaged the weight is more evenly distributed, that's about as well as I can explain it.

perfectlap

so in other words, the less you use the clutch the less the RMS is affected?
Interesting, because coming from a Miata I got into the habit of shifting often to keep the car in the tasty part of the power band.

kilrgt

A good point but I don't feel this is any relevance on the RMS leak. My car is an 04 with 4 replaced RMS, now the car has the new type and its been fine for almost a year, where as the other seals lasted all of 2 months at the longest. Shifting styles and at any RPM has nothing to do with it I think.

perfectlap

is the new type RMS from the Cayenne?

4 seals in 1 year? where do you usually shift (RPMs)? do you usually let the car come up to temp before shifting into 1st?

Palting

Not so sure I follow the logic. The crankshaft is connected to the flywheel. The clutch face connects the flywheel to the tranny. Stepping on the clutch pulls the clutch face away from the flywheel. All the pressure is on the clutch and tranny, not on the flywheel or RMS, when you step on the clutch. Step on the clutch and shift as frequently as you want. I think you'll wear down the clutch, the release bearing and your synchros, but I dont' think you'll do anything to the RMS one way or the other.

Jerky clutch release, popping the clutch, now that I can see affecting the flywheel/crankshaft/RMS. Sudden forceful jerky engagement between the clutch face and flywheel can put pressure on the bearings and RMS.

Yeah, I like to stay up there in the RPM and listen to that PSE, and I like to shift up or down even while maintaining the same speed just for the joy of shifting and throwing that lever.

1999Porsche911

Putting your car in neutral at red lights will cause RMS failure as will not bouncing off the rev limiter each and everyday.