Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

Transmission Clutch help

Thread Tools
 
Search this Thread
 
Old 06-07-2002, 07:54 PM
  #1  
Mike 944
Racer
Thread Starter
 
Mike 944's Avatar
 
Join Date: Jul 2001
Location: Canada
Posts: 433
Likes: 0
Received 1 Like on 1 Post
Post Transmission Clutch help

Hi,
I recently got my transmission rebuilt and a new SACHS Power clutch put in. Right after the car was rebuilt, it was put away for 5 months.
Today I took out the car, and noticed a few things.
The car shift smoothly...very nice. However, when I downshift...I hear the whole car vibrate as if I am just learning to drive stick.
Let me explain better...
Let's say I am doing 70km/hr in 3rd gear...and I slow down to 60. Now when I reach sixty, I let go of gas, and, assuming my clutch was pushed down, I begin to lift it...when it reaches the friction point (and a bit before), I get HEAVY HEAVY vibration (sounds like transmission is going to fall on the floor!).
Now I am not keeping the clutch at the friction point, but even if I was going to, the car should slow down without problems correct? I can only downshift when I am revving very low, and under 2000rpm.
Also, if I am in 2 nd gear, and I release all pedals (to make car slow down alone), I hear the my transmission hissing loudly. I was told these are the bearing and should go away with time.


Anyways, I just to know what you guys think this can be? I've only driven in 1st, 2nd and 3rd and have only downshifted from 3rd to 2nd.
Any ideas? Please....
Old 06-07-2002, 07:59 PM
  #2  
Rob
Addict
Rennlist Member

 
Rob's Avatar
 
Join Date: May 2001
Location: Melbourne, Florida
Posts: 942
Likes: 0
Received 0 Likes on 0 Posts
Post

What all did they replace when they rebuilt your transmission. Somebody rebuilt my nephews trans before he got the car and it started doing this. I've been into it a couple times and everything looks good, but I don't know what they were in there for or what they replaced.

Rob
Old 06-07-2002, 08:02 PM
  #3  
Mike 944
Racer
Thread Starter
 
Mike 944's Avatar
 
Join Date: Jul 2001
Location: Canada
Posts: 433
Likes: 0
Received 1 Like on 1 Post
Post

The main thing was the 2nd gear synco and throw out bearing. At the same time the other syncros were replaced with either new, or used (but better condition) ones. Also, all seals, bearing etc...
Old 06-07-2002, 09:32 PM
  #4  
87rb944
Advanced
 
87rb944's Avatar
 
Join Date: Jun 2002
Posts: 61
Likes: 0
Received 0 Likes on 0 Posts
Post

How much was the trans rebuilt, if I may ask? I own an 87' 944 and was thinkind of having the trans checked.
Old 06-08-2002, 12:37 AM
  #5  
Bones944
Burning Brakes
 
Bones944's Avatar
 
Join Date: May 2002
Location: Rocky Mount, NC
Posts: 792
Likes: 0
Received 1 Like on 1 Post
Post

sounds like something leaked on the clutch disc, or is greasy from being replaced, and is chattering badly. I degreased my motor and had some chatter for a few days until I wore the gunk off of the disc.
Old 06-08-2002, 03:52 PM
  #6  
billybones
Burning Brakes
 
billybones's Avatar
 
Join Date: Jun 2001
Location: Utica Michigan
Posts: 1,088
Likes: 0
Received 0 Likes on 0 Posts
Post

I thought it was bad for these cars to use the rear wheels to slow the engine? I read that somewhere. But it sounds like that your clutch needs to be worked in.. just like brakes do.. I am in the middle of replacing my clutch. will let you know if I have the same problems. till it gets seated properly.. I would expect some slippage and grab for a bit.. AH now I remember.. having the wheels drive the engine increases the chance of a timming belt failure.. I think?... seems right.



Quick Reply: Transmission Clutch help



All times are GMT -3. The time now is 05:37 AM.