Vehicle Speed Sensor (VSS)

[silvex]

My 2007 Buick Lucerne CXL V6 speedometer started to get the jitters. Here is a live data graph of the VSS. The wheel hub speed sensors graphs are butter smooth. No code presents.

 

[2007LucerneCXL]

The VSS is #3 on the transmission which may be the problem with the sensor, connector or harness. Just something to check from the post.

 

[silvex]

VSS was replaced and problem still present. Do I have to do anything after VSS is replaced?

 

[silvex]

Is this normal for a transmission rebuilt about 15k miles by AAMCO. This is the VSS that was replaced.

 

[HotZ28]

That is not NORMAL wear! Did you get any warranty from Ammco for the rebuild? Som Ting Wong with that rebuild!

 

[silvex]

That is what the mechanic said! Will go tomorrow to AAMCO they have 18 months 18K miles. I am over the 18months, but under 18k miles. (16k)

 

[2007LucerneCXL]

Hopefully AAMCO will stand behind the warranty, but a pan drop and filter inspection may have more unwanted details.

 

[silvex]

I dropped the car off at AAMCO today.

 

[HotZ28]

Keep us informed of the findings. Thanks

 

[silvex]

AAMCO says there is nothing wrong with the car, but it is hard shifting and the speedometer is jumpy.

 

[silvex]

AAMCO ofters 18 month 18k miles. It is under 18k miles, but over 18 months. They say its out of warranty.

 

[2007LucerneCXL]

Warranties can be a pain. Time to drop the pan and filter to see what may be inside and check the fluid condition.

 

[silvex]

I picked the car up. The transmission is butter smooth and the speedometer is no longer jumpy. Was it the VSS or they reset the transmission tables (did a transmission relearn?)

Do you have to do a transmission relearn when replacing VSS?
This is a transmission re-learn on a Ford. Which says it fixed the hard shifting.

 

[2007LucerneCXL]

If the battery was disconnected 30-60 minutes it should have cleared the PCM for the relearn, if the TAPS were cleared ask the shop.

 

[silvex]

They said nothing was done...not very transparent shop.

 

[silvex]

I took it to another transmission shop and $3200 later. It was rebuilt and zero issues not. It had broken parts and was touching the speed sensor. Most of his customers come from... AAMCO.

 

[Bobert]

VSS was replaced and problem still present. Do I have to do anything after VSS is replaced?

Same issue. Only One VSS???

 

[2007LucerneCXL]

Yes, only one, see diagram post #2

 

[Bobert]

Acdelco swap at 3. same faulty speedo and shift. no codes on level 1 CEL reader. 07 lucerne. Visually checking connector next. 175K. old unit fine metal dust around o-ring