Question about 1991 Cadillac DeVille
I don't believe the problem is in the vehicle speed sensor. I suspect the problem may be the computer. The speed sensor is just a magnet inside the transmission with an induction coil outside to create an electrical signal every time the transmission output shaft turns. That signal goes to the computer and the computer tells the transmission when and how to shift and displays the speed on your electronic display. I would start by having a reputable transmission shop check out the transmission, then take it to a good mechanic to have him check the computer. It is a relatively expensive fix, but with only 70,000 miles on the Caddy, it should be worth it.
Posted on Feb 22, 2009
Tips for a great answer:
Jan 28, 2014 | 1992 Cadillac DeVille
Mar 22, 2011 | Mercury Sable Cars & Trucks
Sep 15, 2010 | 2005 Chevrolet TrailBlazer
Apr 26, 2010 | 1995 Ford F150 Styleside Regular Cab
Apr 01, 2010 | 1991 Nissan Maxima
Dec 19, 2009 | 1996 Cadillac DeVille
Dec 07, 2009 | 1992 Isuzu Trooper
Jun 08, 2009 | 1996 Cadillac DeVille
263 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: