1995 Cadillac Sedan Deville hard downshift - Cadillac Forum - Enthusiast forums for Cadillac Owners

1995 Cadillac Sedan Deville hard downshift

Reply

 
 
 
  #1  
Old 03-08-2013, 07:02 AM
Junior Member
Thread Starter
Join Date: Mar 2013
Posts: 2
Default 1995 Cadillac Sedan Deville hard downshift

I recently purchased a 1995 Cadillac Sedan Deville 4.9 liter. I noticed that while slowing down to stop, the transmission violently shakes while it tries to go into 1st gear (obviously, from 2nd). The shaking happens at around 16 mph and stops a few seconds later after it makes it to 1st gear. It has no other transmission issues other than this...drives down the highway like a champ! I found a few forums with people having the same problem as mine, but they were old posts and no one posted their results for the repair. I want to keep this caddy but I need help figuring out the tranny issue.
 
Reply With Quote
  #2  
Old 03-08-2013, 07:59 AM
Junior Member
Thread Starter
Join Date: Mar 2013
Posts: 2
Default

Thought I should mention that upon starting the car, there is a slow, steady banging sound coming from what sounds like the tranny...for all I know, it could be the air ride compressor, as I don't know where mine is located but I have a Service Air Ride error that always stays on. If it's the compressor, I don't care, but if it's the tranny obviously I do. It goes away instantly when the car is put in gear. I'm gonna need some help.
 
Reply With Quote
  #3  
Old 04-01-2013, 10:37 PM
Adams' Apple's Avatar
Tech Certified Members
Join Date: Sep 2009
Location: Duncanville, Texas
Posts: 409
Default

From the description, it sounds like it could be the converter clutch(TCC) not dis-engaging, and trying to kill the engine at a stop. You should pull the codes to see what codes are stored first, then go from there. TO get the codes, with the key on, press the "OFF", and "Warmer" buttons on the climate control panel at the same time, and hold them down for about 5 seconds or so. The information center under the speedo will show any/all codes present, starting with Engine/trans codes, then Instrument panel, HVAC(A/C), Traction Control, and Suspension.
Post the codes you find, and we can go from there.
 
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
clampet
Cadillac Seville
1
12-02-2008 10:23 AM
STS99BL
Cadillac Seville
6
10-30-2008 02:09 PM
tonym2180
Cadillac Deville
6
02-25-2008 01:11 AM
dgd1956
Automatic Transmissions
1
06-29-2007 02:25 PM
tankguy1975
Private For Sale/Trade Classifieds
0
12-02-2006 10:25 PM


Thread Tools
Search this Thread
Quick Reply: 1995 Cadillac Sedan Deville hard downshift


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.