2004 Buick Lesabre.
Had a transmission flush and filter change.

04 Buick Lesabre shifts rough sometimes from 1st to 2nd feels like a slight shudder, been told need
another transmission. Had it flushed,has helped some. Has 225 60r16 tires when door panel says
215 70r 15 tires. Some models came with the 225 option.

I was wondering does or can computer shift points need to be changed, I've heard with different tires
computer needs to be reset or it throws shifts, speedometer and odometer off. The flushing showed
no signs of debris in the pan. Was wondering does it need an additive or do some Buick just tend to
have that noticeable shift, tends to do more if I push the gas harder than normal.

Answer:
Hello and thank you for the tip / donation. The
tire size concern would not have anything to do with
this shifting, although it would be a good idea to have the reprogramming done. This would need to
be done with a dealer scan tool.

There are a few possibilities for the shifting concern. First, since the flush seemed to help, i would
suggest doing that again, but use the newest GM trans fluid - Dextron 6.


2006 BUICK LUCERNE CHECK ENGINE codes P0758  P0753  P2761.
Question:
REPAIRED WIRING TO AC CLUTCH THAT HAD BEEN RUBBING ON THE AC FREON LINE AND
BROKEN. PROBLEM STARTED AFTER THE REPAIR I HAVE LOOKED AT THE WIRING HARNESS
AND DO NOT SEE ANY CHAFFED AREAS. I CLEARED CODES.

PROBLEMS SHOWS UP AFTER ENGINE WARMS UP MAY BE 10 MINUTES OF DRIVING, WHEN
CODES ARE CLEARED WHILE WARM PROBLEM COMES BACK. WHEN COLD IT DRIVE NORMAL
UNTIL WARM. OIL LEVEL IN TRANS IS AT CORRECT LEVEL. I HAD THE CAR JACKED  UP ON THE
PASSENGER SIDE AT A 25 DEGREES  WHILE FIXING AC WIRING  AND STARTED CAR  MAYBE
DIRT MOVED IN TRANNY? WIRING DAMAGED.

Answer:
I would check the transmission connector and terminals at the transmission. While you had the car
jacked up and doing the other repairs, that may have stretched that transmission harness. Make sure
the plug is tight. Wiggle the wires while the car is running to see if you can cause the problem.
;




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Buick Lesabre Transmission Shifting And Pan Leaks


2005 Buick Lesabre leaky oil pan.
Question: Why does my car leak oil on garage floor from oil pan?

Answer:
Why? Any car can leak oil from any gasket. The
3800 engine is common for the oil pan leaking, or
the rear main seal. A mechanic will have to look at it to be sure.

If the rear main is the leak, the frame will have to be removed, engine supported and the
transmission removed. The seal is installed in the rear plate, and the plate gasket must also be
replaced.