Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Rough Shifting

Old Jun 17, 2009 | 04:54 PM
  #1  
Rye Guy's Avatar
Thread Starter
Member
Posts like a V-Tak
 
Joined: Aug 2005
Posts: 98
Likes: 0
From: Toronto, Canada
Rye Guy is on a distinguished road
Default Rough Shifting

Lately when I shift from park to drive or vise versa I notice that sometimes that the car jerks backwards slightly. I am not moving the lever slowly allowing it to engage in reverse either. It almost seems like the engine is revving to fast and engaging in reverse while I am moving the lever to drive. Also when the tranny engages in drive there is a bit of a clunk. The engine is idling at 700 rpm'*. Is that normal RPM'* at idle or should it be lower?? Any suggestions?
Reply
Old Jun 17, 2009 | 07:58 PM
  #2  
GXP Venom's Avatar
Administratus Emeritus
Certified Car Nut
 
Joined: Jan 2006
Posts: 16,539
Likes: 18
From: Purgatory, Pennsylvania
GXP Venom is on a distinguished road
Default

Clunk doesnt sound good. Mine idles @ 750 when it calms down from starting. It does try to go into reverse when the "choke" is on and I'm a little slow on the shifter. I have 42k now and no clunk. A faint slippage between 3rd and 4th at low throttle country driving. Maybe wear, maybe T/C lock getting quirky.
Reply
Old Aug 24, 2009 | 11:18 PM
  #3  
zecc81's Avatar
Senior Member
Posts like a 4 Banger
 
Joined: Sep 2008
Posts: 133
Likes: 0
zecc81 is on a distinguished road
Default

I can tell the clunk for me is a bad engine mount
Reply
Old Aug 24, 2009 | 11:19 PM
  #4  
zecc81's Avatar
Senior Member
Posts like a 4 Banger
 
Joined: Sep 2008
Posts: 133
Likes: 0
zecc81 is on a distinguished road
Default

I can tell you the clunk for me is a bad engine mount
Reply
Old Sep 1, 2009 | 12:30 PM
  #5  
Rye Guy's Avatar
Thread Starter
Member
Posts like a V-Tak
 
Joined: Aug 2005
Posts: 98
Likes: 0
From: Toronto, Canada
Rye Guy is on a distinguished road
Default

I think the engine mount is my problem too. The dealer doesnt get it though. Called it normal operation. Time to go to the dealer that sells Caddies, they will likely know there stuff better!!
Reply
Old Sep 2, 2009 | 09:52 AM
  #6  
Rye Guy's Avatar
Thread Starter
Member
Posts like a V-Tak
 
Joined: Aug 2005
Posts: 98
Likes: 0
From: Toronto, Canada
Rye Guy is on a distinguished road
Default

Took her to the Caddy/Pontiac dealer. The foreman came and took her for a ride. He agreed that there seems to be a problem and was open to doing a full inspection on the engine mounts. Does anyone know if there is a Technical Service Bulletin for this. I used to subscribe to ALLdata but havent in a few years.
Reply
Old Sep 8, 2009 | 03:10 PM
  #7  
Rye Guy's Avatar
Thread Starter
Member
Posts like a V-Tak
 
Joined: Aug 2005
Posts: 98
Likes: 0
From: Toronto, Canada
Rye Guy is on a distinguished road
Default

Just got a call from the dealer that agreed to fully inspect the engine mount. The engine mount is cracked and is being replaced. I guess I will be switching dealerships!! The other dealer tried to tell me there was nothing wrong the car. Boy are they going to get an ear full!!!
Reply
Old Sep 13, 2009 | 06:42 AM
  #8  
Bville_GXP's Avatar
Senior Member
Posts like a Turbo
 
Joined: May 2009
Posts: 248
Likes: 0
From: South Carolina
Bville_GXP is on a distinguished road
Default

Good to see you got it fixed.............
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
russianpolarbear
1992-1999
8
May 15, 2003 03:47 AM
2000SilverBullet
Performance, Brainstorming & Tuning
1
Apr 10, 2003 02:44 PM
toxictelevision
Performance, Brainstorming & Tuning
1
Feb 10, 2003 12:37 AM
Sol
1992-1999
1
Jan 2, 2003 07:12 PM
Spaceman
General GM Chat
5
Dec 31, 1969 07:00 PM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 07:29 AM.