Bonneville shifting hard - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-13-2013, 06:36 AM   #1
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Bangor, Maine
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
bigmac2013 is on a distinguished road
Default Bonneville shifting hard

My automatic 2000 Bonneville is shifting hard when it switches gears. The car fetches when it shifts - but it doesn't stall.

It shifts in and out erratically. Going up a hill it'* in overdrive.

I hooked it up to a diagnostic tool that said the torque converter clutch is engaged.

Does anyone know how I can fix this?

Where is the torque converter clutch located?

Thanks!
bigmac2013 is offline   Reply With Quote
Old 04-13-2013, 06:54 AM   #2
Senior Administrator


Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,636
Thanked 990 Times in 769 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Indeed, the torque converter being locked up would cause shifts to be hard like that, but I'm curious as to why it stays locked up all the time, but you can still start the car out in from a stopped position.

Only thing I can think of that would cause that would be the solenoid is sticking open/closed to enable the lockup feature of the TCC.

Do you remember what the code was?
Mike is offline   Reply With Quote
Old 04-13-2013, 07:11 AM   #3
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Bangor, Maine
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
bigmac2013 is on a distinguished road
Default

Thanks for your quick reply Mike.

It says the torque converter clutch is engaged but the car still starts fine and doesn't stall - only shifts hard when it'* going. A friend used his diagnostic tool - I don't have the code with me but he wrote it all down. I can call him later and get it. I have a handheld diag tool I can try.

Could it be a dirty filter/low fluid pressure do you think?
bigmac2013 is offline   Reply With Quote
Old 04-13-2013, 10:53 AM   #4
Retired Administrator

True Car Nut
 
GunsOfNavarone's Avatar
 
Join Date: Apr 2009
Location: Williamsport, PA
Posts: 2,854
Thanked 167 Times in 129 Posts
GunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud of
Default

Changing the filter, fluid and installing a low cost shift kit have all been methods for a long term bandaid on many of the shift problems you are experiencing. I had the same problem you are describing at 90k miles. I installed the shift kit, replaced the filter and upgraded the fluid to DEXRON XI. I am now at 182k miles and tranny still working good.
GunsOfNavarone is offline   Reply With Quote
Old 04-13-2013, 12:48 PM   #5
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Bangor, Maine
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
bigmac2013 is on a distinguished road
Default

Hi Michael,

Thanks for your reply. That'* great - I have a whole case of Dexron. I'm going to get a filter now and try what you suggested. I'll let you know how it goes.
bigmac2013 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1999 Pontiac Bonneville with hard shifting transmission!! Brobbins87 1992-1999 9 10-07-2010 10:48 AM
4T65E hard shifting when driven hard pontiacandryan 1992-1999 14 06-29-2009 05:25 PM
Transmission Shifting Hard - 4t65e SuperchargedFury 1992-1999 2 09-03-2004 11:54 AM
Hard shifting thoughout all gears after the range senor..... killer_cr80r Lounge 5 06-16-2004 02:51 AM
Hard shifting into Park Jim W Bonneville GXP/ Northstar Powered Cars 6 06-07-2004 09:52 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:10 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.