Has anyone tried Seafoam for hard shifts and did it work ? - 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 02-25-2008, 06:22 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2006
Posts: 471
Thanks: 0
Thanked 1 Time in 1 Post
goldfinger22 is on a distinguished road
Default Has anyone tried Seafoam for hard shifts and did it work ?

I called the tranny shop today and they said to replace the pressure switch was 290.00 due to the labor to get the cover off.

Mine doesn't shift hard all the time and when it does it you shut it off and restart it shifts smooth as glass. I was wondering about Lucas or Seafoam and if it would help this. The shop said it will do no good.

If you do use it do you need to drain and refill after using or can you leave it in? Interested n hearing if anyone has used it for this problem with success.

Thank you
goldfinger22 is offline   Reply With Quote
Old 02-26-2008, 04:02 PM   #2
Senior Member
Posts like a Camaro
 
Join Date: Jun 2007
Location: Chambersburg, Pennsylvania
Posts: 882
Thanks: 0
Thanked 0 Times in 0 Posts
putertopia is on a distinguished road
Default

I've used it before and it actually firmed up the shifts on saggy transmissions with 100k+ miles on it.

I would imagine if your issue is caused by any type of build up in the valve body, it could possibly help. The can instructs you to change the trans fluid within 100 miles after adding this I believe.
putertopia is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
97 and 98 Park Avenue with hard shifts jessie_klinge Buick 5 01-05-2013 04:37 PM
Really weird shifts/non-shifts HELP! Brokeguy 1992-1999 5 10-11-2011 11:06 PM
1996 SSEi shifts hard between 1 and 2 Mr Fix It 1992-1999 2 11-10-2009 09:10 AM
Has anyone used SeaFoam?? Black Pearl Lounge 14 04-29-2009 08:51 PM
Stiffer Shifts vs Softer Shifts Hans Performance, Brainstorming & Tuning 9 12-06-2006 09:17 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 08:27 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.