Notchy into 2nd on new clutch G50

johncarlos2003 · 12-27-2005, 10:07 AM

hi guys-

i have an 88 coupe with, of course, the g50. just put in complete new clutch kit and changed all lubs including use of swepco 201--- anyway, thing is shifiting great except there is a little notch getting into 2nd until she is warmed up- doesn't have to be warm warm- just a few minutes then she is smooth as silk all around
(i usually warm the car for about 6-10 minutes before taking it out and i stay under 4k until she is good and ready)- it had no notchiness at all before i put in the new clutch kit which was necessary cause i was victim to an exploding rubber center clutch disk. any thoughts on why it may be like this or how i might be able rid of it? thanks!

KFC911 · 12-27-2005, 10:35 AM

Swepco is preferred for the pre-G50 trannys. You'll want to change to Mobil 1 or some other synthetic. Hope this helps...

Grady Clay · 11:10 AM

John,

It is better to drive your 911 from start-up rather than letting it "warm-up" sitting at idle. You will find the "sweet spot" where it runs best during warm-up. The best is to apply load to it but not very high revs (< 4K).

I suppose the exception is if it spent overnight outside in Vail or Aspen and was significantly below 0F.

If you find the G50 notchey, drive around it until warm.

Don't think a G50 (compared to a 915) is invincible to damage. The past two summers I have ridden/driven with too many owners who seriously abuse their G50s in spite of my admonitions. I suppose it will take a transmission rebuild bill ($$$$) to get the point home.

I wouldn't go into your G50 for this problem. First it may be hard to define and locate. Does anyone have PCNA notices on this?

Best,
Grady

johncarlos2003 · 12-27-2005, 11:03 AM

Thanks Grady. Sometimes i do sit in the car and keep the rpm's at about 12-15 while it warms- i didn't know it is better to run it from start up. Can you explain brief details- (i suppose just gets oil moving more quickly but ??) thanks. And, I wouldn't go in on this either as it does go away always- and within a few minutes of driving and then is gone for the day- just didn't notice it before the clutch change though i can certainly live with it.

88-diamondblue · 12-27-2005, 11:09 AM

Second on using Mobil 1. Synthetic is what is recommended in 101 Projects. The Swepco is for the 915 transmission. Do a search and you will find many posts on this. I changed mine with Mobil 1 and is still stiff when cold. Once warm, it's smooth.

johncarlos2003 · 12-27-2005, 11:25 AM

thanks for the mobil 1 reco. --- anyone on the driving from start up details? thanks.

Grady Clay · 12-27-2005, 11:38 AM

John,

What do the friction surfaces look like on your old clutch?

Did you get the friction surfaces of your pressure plate and flywheel absolutely (lacquer thinner) free on any rubber from your old disc? Did you “scuff-up” the friction surfaces or are the polished & shiny? Was there any signs of oil contamination on the disc?

This sorta sounds like the disc wrings itself to the other clutch parts until warm or isn’t fully releasing..

Did this happen from the first drive after the disc replacement?

Is there any indication of the clutch not fully releasing – like when you go to put it in reverse?

On start-up cold, within the first few seconds, the oil is everywhere. Applying power gets heat into the engine and everything warms up faster. It is desirable to have the engine operate on its start-up and warm-up fuel enrichment as little as possible. The rich-running accelerates wear on the pistons, cylinders and rings. The sooner you get out of that mode the better. With the older MFI it is an extremely serious issue. I also apply this to my Toyota 2.0 daily and the 7588 cc Ford.

Best,
Grady

Steve@Rennsport · 12-27-2005, 11:57 AM

Grady offered 24 kt advice about not idling a car to warm it up.

Honestly, thats one of the worst things you can do to an engine,....

Start the car, let it idle for 20-30 seconds, and drive off. Keep the revs below 4K until you see some oil temps on the guage and be gentle for several miles so the transmission, CV joints, and wheel bearings climb into their normal temperature range. That ensures that all the lubricants can do their respective jobs properly.

Your car will last a LOT longer for the efforts,...

johncarlos2003 · 12-27-2005, 12:26 PM

i will start a new warm up routine. have been doing the improper warm up for a few months only- thanks guys! i want this baby to live forever!

dean · 12-27-2005, 05:16 PM

Try rebleeding your clutch again.

Dean

johncarlos2003 · 12-27-2005, 11:05 PM

thanks for the suggestion guys- my porsche tech bud and i are gonna take a look at things over the next day or so- ill keep ya posted- thanks