Question about 1993 Buick LeSabre
The transmission shifts strong into 1st gear and reverse but will not shift into second. Could this be due to a defective vacuum modulator? If so, is there a way to check the modulator or is the problem more likely to be in the transmission itself. How about a vacuum leak in the line from the intake manifold?
What is a vss
Posted on Jan 26, 2016
No, the modulator on a 4t60e only will adjust shift feel, not shift points. Does the trans not shift up or go it to neutral instead of 2nd? Does you speedo work? The pcm needs a speed input to shift the trans. You might have a bad VSS
Posted on Mar 03, 2009
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
May 06, 2016 | 2002 Buick LeSabre
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
Aug 06, 2012 | 1995 Buick LeSabre
Jun 07, 2012 | 1992 Buick LeSabre
Nov 17, 2011 | 2000 Buick Park Avenue
Jan 24, 2010 | 1994 Buick LeSabre
Jun 03, 2009 | 1995 Buick LeSabre
Mar 01, 2009 | 1993 Buick LeSabre
Jan 06, 2009 | 2000 Buick LeSabre
879 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: