Dexron VI causes transmission whine / howl

[CadillacSam]

Hi there,

finally I changed the transmission fluid in my 04 XLR, going with Dexron VI.

But: Has anyone experienced a whining / howling with the Dexron VI?

Now the car starts to whine as soon as you crank it up and goes on until
it's completely warmed up - even now in summer.
Didn't have that before with the old Dex III.
So now I wonder if I should go back to the old style fluid or
is it a reset or something like this in the onboard system I have to do?

Thanks for help!

Sammy

 

[rexster314]

From the XLR owner's manual:
Automatic Transmission
DEXRON®-III Automatic Transmission Fluid.
Look for “Approved for the H-Specification” on the label.

 

[beaver_jd]

I was going to do a total fluid change on my car this Fall including engine oil , transmission , radiator and rear end. The car runs great and maybe I should leave well enough alone and just do an OIf. I got 86,000 miles on the car.
John F.

 

[mickeytee]

dexron 3

I dont think Gm even sells dexron 3 any longer .According to Gm 6 is what they reccomend to use. You may not have it completely full? I would start with double checking that. Did yo udo a filter change also? Only thing I read was not to use 6 in manual transmissions that call for 3

here is a link to GM tsb

http://www.cadillacfaq.com/faq/tsb/data/04-07-30-037a.pdf
​

 

[beaver_jd]

According to the link I just read my 06 uses Dextron V1. However my manual say Dextron 111. Can I use Dextron V1 as a replacement. It appears to be a problem on the 04 model.
John F.

 

[CadillacSam]

Oil reset

According to the link I just read my 06 uses Dextron V1. However my manual say Dextron 111. Can I use Dextron V1 as a replacement. It appears to be a problem on the 04 model.
John F.

That's the question. Some stores still sell Dex III H from ACDelco, but it was officially replaced by VI.

Many Cadillacs have a reset option when filling new oil into the transmission,
but I couldn't find it in the shop manual for my XLR.

Does it have one and can somebody help with the procedure?

By the way: Changed the differential fluid, too. ACDelco 10-4034 is a great choice, no noises coming from diff anymore when
drivin' close corners.

 

[CadillacSam]

I dont think Gm even sells dexron 3 any longer .According to Gm 6 is what they reccomend to use. You may not have it completely full? I would start with double checking that. Did yo udo a filter change also? Only thing I read was not to use 6 in manual transmissions that call for 3

here is a link to GM tsb

http://www.cadillacfaq.com/faq/tsb/data/04-07-30-037a.pdf
​

Yes I measured the amount of old fluid coming out just to be sure.
Procedure exactly like the manual says of refilling (not the flushing procedure)

 

[beaver_jd]

I was going to change the diff as well but changed my mind when I heard stories of noisy rear ends after this was done.
John F.

 

[CadillacSam]

I was going to change the diff as well but changed my mind when I heard stories of noisy rear ends after this was done.
John F.

Diif was fine - no issues with the new fluid.
Did you change transmission too?

 

[David_B]

It's the same transmission and diff as the corvette. If you have technical questions about the corvette parts, there are much better resources than here for those items. I've learned a lot by reading corvette forums, from brakes to most of the chassis.

I was going to change the diff as well but changed my mind when I heard stories of noisy rear ends after this was done.
John F.

 

[CadillacSam]

It's the same transmission and diff as the corvette. If you have technical questions about the corvette parts, there are much better resources than here for those items. I've learned a lot by reading corvette forums, from brakes to most of the chassis.

Thanks, I will try the Corvette forums.

But one question is left and it's Cadillac specific, cause the control modul is Cadillac, not Corvette:
Is there an option to reset transmission fluid indicator or even the whole transmission?