Hard Tranny Shift - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-21-2008, 08:20 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
LondonOntMan's Avatar
 
Join Date: Oct 2007
Location: London, Ontario, Canada
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
LondonOntMan is on a distinguished road
Default Hard Tranny Shift

I notice a lot of different symptoms about the same problem so let me describe mine as best I can and I hope I can get some suggestions from everyone. I shift the car from PARK to OD and go. If I take off at a normal pace there is a hard shift from 1 to 2. The tranny is in normal mode. All other shifts are smooth. If I do the same thing with a little more lead foot the shift is smooth. If I switch the tranny into performance mode the same problem is there just not as severe. I did a complete tranny flush 10,000k ago. In checking my MODIS there are no codes present. Any ideas where I could start looking? I have 188,220k on the car.
LondonOntMan is offline   Reply With Quote
Old 04-21-2008, 08:29 PM   #2
Senior Member
True Car Nut
 
Join Date: Aug 2005
Posts: 5,797
Thanks: 0
Thanked 0 Times in 0 Posts
Peterg22000 is on a distinguished road
Default

check your VAC line going to the shift modulator (from of the trans, under the TB)

I fixed(if you can call it a fix) Thunderhands car this weekend, he discribed the same thing as you, so I went to look at the line and noticed it had popped off (or was taken off by a mechanich that did some work on his car)

EDIT: http://www.bonnevilleclub.com/forum/...066606#1066606
Peterg22000 is offline   Reply With Quote
Old 04-21-2008, 08:32 PM   #3
Member
Posts like a V-Tak
Thread Starter
 
LondonOntMan's Avatar
 
Join Date: Oct 2007
Location: London, Ontario, Canada
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
LondonOntMan is on a distinguished road
Default

Will check that out Saturday when I am back at my garage. Thanks for a place to start looking. I was going to eventually change all the vacuum lines because they are getting old.
LondonOntMan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Survey - fix hard shifting tranny when hot using shift kit? billha General GM Chat 11 04-13-2012 01:15 AM
4T65E hard shifting when driven hard pontiacandryan 1992-1999 14 06-29-2009 05:25 PM
How hard are these tranny supposed to shift?? '02 SSEi crazyjoe 2000-2005 13 01-04-2006 07:45 PM
Hard Shift garlandchaos 2000-2005 12 11-09-2004 07:38 PM
Hard Shift russianpolarbear 1992-1999 10 07-03-2003 02:35 AM


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 07:25 PM.


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.