Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

5-speed unable to select 1st or Reverse

Thread Tools
 
Search this Thread
 
Old 09-20-2013, 02:50 PM
  #1  
stealth
Rennlist Member
Thread Starter
 
stealth's Avatar
 
Join Date: Jun 2005
Location: Boston area
Posts: 377
Likes: 0
Received 1 Like on 1 Post
Default FIXED - 5-speed unable to select 1st or Reverse

86.5

There's no resistance/spring when pushing the shifter to the left. Can get it into the other 4 gears. Based on what I can see about the exterior shift linkage, I assume the broken linkage (or sheared pin, or loosened screw) must be inside the transmission case (and therefore requiring an annoying and potentially impractical, in my case, number of simoleons to have repaired)?

Last time I drove it, shifting into first felt awkward right near the end of the drive, but I believe I managed to park it in 1st as usual. The next time I went to drive, I think I ran it in neutral for a half-minute after starting it, then things were buggered as they are now and I had no reverse or 1st.

Two immobilized 928s with unusual failures and difficult-to-access fixes that require extended periods on jack stands...may just break my spirit (there's a point where the pleasure doesn't offset the pain)...

Last edited by stealth; 10-11-2013 at 04:04 PM.
Old 09-20-2013, 02:59 PM
  #2  
dprantl
Race Car
 
dprantl's Avatar
 
Join Date: Dec 2003
Location: Atlanta, GA
Posts: 4,477
Likes: 0
Received 4 Likes on 4 Posts
Default

There is a possibility that your problem is caused by disintegrated bushings in the rear shift coupler. Get under the car just forward of the transmission, pull back the rubber boot on the coupler (if it's still there) and inspect it.

Dan
'91 928GT S/C 475hp/460lb.ft
Old 09-20-2013, 03:08 PM
  #3  
stealth
Rennlist Member
Thread Starter
 
stealth's Avatar
 
Join Date: Jun 2005
Location: Boston area
Posts: 377
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by dprantl
There is a possibility that your problem is caused by disintegrated bushings in the rear shift coupler. Get under the car just forward of the transmission, pull back the rubber boot on the coupler (if it's still there) and inspect it.

Dan
'91 928GT S/C 475hp/460lb.ft
Those bushings were on a to-do list, and I guess you're right-- I hadn't thought about a partial-failure mode for that coupler. Certainly worth a check! Thanks!
Old 09-20-2013, 03:34 PM
  #4  
Alan
Electron Wrangler
Lifetime Rennlist
Member
 
Alan's Avatar
 
Join Date: Mar 2002
Location: Phoenix AZ
Posts: 13,426
Received 422 Likes on 289 Posts
Default

I never park my car in gear - first or otherwise - in first you are continually stressing the spring ...

The spring is in the transmission - I wouldn't want to drive my car with that spring gone, or even the centering spring - I rely on both of them for positioning

Alan

Last edited by Alan; 09-20-2013 at 05:06 PM.
Old 09-20-2013, 04:50 PM
  #5  
Jfrahm
Addict
Rennlist Member

 
Jfrahm's Avatar
 
Join Date: Mar 2002
Location: Boulder, CO
Posts: 6,509
Likes: 0
Received 126 Likes on 112 Posts
Default

Yes, before I replaced the coupler bushings I could hardly get into 1 or R without taking the console off.
Old 09-20-2013, 06:13 PM
  #6  
Mrmerlin
Team Owner
 
Mrmerlin's Avatar
 
Join Date: May 2004
Location: Philly PA
Posts: 28,293
Received 2,469 Likes on 1,389 Posts
Default

if the couplers are good then try re centering the shifter by loosening the 13mm pinch bolt on the shifter shaft,
they can sometime be loose enough to slip and cause misalignment issues
Old 09-21-2013, 12:14 AM
  #7  
granprixweiss928
Three Wheelin'
 
granprixweiss928's Avatar
 
Join Date: Jun 2013
Location: Norcal
Posts: 1,391
Received 27 Likes on 14 Posts
Default

in a similar situation...with an 81 5speed. I can get in to all gears, but I have no resistance to the right ( from neutral) when moving the lever. to the left i have tension. sometimes getting into gear the last 1/2 or so of lever travel ( front to back) is difficult, which makes for slow shifting, especially 1st to 2nd. What does this mean?
Old 09-22-2013, 01:03 AM
  #8  
granprixweiss928
Three Wheelin'
 
granprixweiss928's Avatar
 
Join Date: Jun 2013
Location: Norcal
Posts: 1,391
Received 27 Likes on 14 Posts
Default

could one of these selector arm springs be broken?

Old 09-23-2013, 04:29 PM
  #9  
Vilhuer
Addict
Rennlist Member

 
Vilhuer's Avatar
 
Join Date: Jun 2003
Location: Helsinki, Finland
Posts: 9,378
Likes: 0
Received 60 Likes on 33 Posts
Default

Originally Posted by granprixweiss928
could one of these selector arm springs be broken?
Thats older design. '85-95 has totally different setup which is known weak point.
Old 09-23-2013, 04:36 PM
  #10  
GregBBRD
Former Sponsor
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 15,230
Received 2,474 Likes on 1,468 Posts
Default

Originally Posted by Vilhuer
Thats older design. '85-95 has totally different setup which is known weak point.
And no longer available....
Old 09-24-2013, 03:46 PM
  #11  
stealth
Rennlist Member
Thread Starter
 
stealth's Avatar
 
Join Date: Jun 2005
Location: Boston area
Posts: 377
Likes: 0
Received 1 Like on 1 Post
Default

One of my "spare" jack stands is missing the pin to raise it, so I couldn't get it off the ground enough to get myself where I could see, but from feel, it seems that the coupler bushings may've "half failed" affecting the movement in one direction but not the other (yet...I assume that's imminent so will minimize shifter movement). I'll order some and drive it in 2nd to a nearby shop with a lift for a hopefully-quick replacement. Thanks, everyone, will close the loop after attempted repair.
Old 09-24-2013, 04:03 PM
  #12  
WallyP

Rennlist Member
Rennlist Site Sponsor

 
WallyP's Avatar
 
Join Date: Jun 2001
Location: Acworth, GA
Posts: 6,469
Likes: 0
Received 11 Likes on 11 Posts
Default

If you can't shift at all, driving in third is better - but your description sounds as if you could shift in the upper four speeds.
Old 10-11-2013, 04:06 PM
  #13  
stealth
Rennlist Member
Thread Starter
 
stealth's Avatar
 
Join Date: Jun 2005
Location: Boston area
Posts: 377
Likes: 0
Received 1 Like on 1 Post
Default

Replacing the rear shift coupler bushings fixed the issue, I guess only one had yet disintegrated. Also got a fresh change of tranny fluid while I was at it, for 4.5 hours of non-Porsche-priced labor by my local mechanic. Thanks again!



Quick Reply: 5-speed unable to select 1st or Reverse



All times are GMT -3. The time now is 11:22 PM.