2002 Cadillac Deville Should I Flush Transmission

Tiny
JOHN068
  • MEMBER
  • 2002 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 85,000 MILES
My 2002 Cadillac DHS has been a good, reliable vehicle. For the last 4-5000 miles however, I'm feeling a slight hesitation in the car at different speeds. It seems as if the transmission is hesitating but there are no clunks or problems when I accelerate. It seems to come when I drive a constant speed and the transmission isn't sure what gear to go in. I spoke to the mechanic I usually use for brakes, and minor stuff and asked if I should service the transmission by flushing it and changing the screens (if there are any) and he advised not to because if the transmission had a problem, it might accelerate the problem. He advised taking it to a Transmission shop. Now that makes me nervous because I see a mechanic that might want to make money out of a small problem that could be solved my reoutine maintenance. Any help appreciated.
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Wednesday, June 4th, 2008 AT 5:32 PM

8 Replies

Tiny
SERVICE WRITER
  • EXPERT
My feeling on replacing the transmission filter is this. IF a problem is going to happen due to the filter and fluid not being changed when it should have been, then is it smart to not replace it regardless if it brings a problem to the surface?

IT is the same as saying that you wouldn't change the engine oil because of.

This may not be a transmission problem regardless.

There is a caddy expert here called Buzzsaw who will probably be posting to this and may be able to help narrow it down.

If you are going to take it to a shop, I would go to a transmision shop, but one that specializes in performance troubleshooting. If you haven't changed the filter this would be the place to take it to as they can evaluate what the sediment looks like in the bottom of the pan.

IS the check engine light on?

Have you checked for any codes stored in the computer?

This may be a the start of the tcc or torque converter problem.
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Thursday, June 5th, 2008 AT 6:03 AM
Tiny
JOHN068
  • MEMBER
Thanks for the reply.

No "Check Engine Light"

Codes?

AMP U1064 History
IPM B0429 Current
PDM U1713 History
PDM U1000 History

Don't believe any are relevant but I will bow to the experts.

Duh? Checked transmission level while hot and in Park and was about 1/2 pint low. Added some but have not taken car on long drive. Still notice a little slight hesitation/jerk while trying to maintain steady speed with little gas peddle pressure.

Speed Converter problem?
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Saturday, June 7th, 2008 AT 5:20 PM
Tiny
SERVICE WRITER
  • EXPERT
Bow? lol...not to me. Looks like the resident caddy guy isn't showing on this one. Codes can make this easier, but not on this one I guess. Should go after the current code regardless.


http://www.2carpros.com/forum/automotive_pictures/30961_111_3.jpg


I can email it if you can't read it.

On the symptom, it can be a bunch of things.

IF the torque convert or tcc were a problem I would have expected a code to show there. But the tcc can be checked for operation.

Things I would be looking at are a vacuum leak, a carbon build up, an out of date software issue-verify that you have the latest and greatest. Bad plug or restricted fuel filter. (IF the plugs and fuel filter have not been changed it would be a good idea) May want to try to mist some water on the wires to see if it acts up-check for an arcing-try to do this in a darker area. Again if the filter and fluid in the tranny have not been changed, this still should get done. Lack of maintenance can bring about problems like this.

Verify the actual temperature of the coolant, the PCM may be being told the temp is too high and it can be turning some cylinders off.

Since there are communication codes in the history, may be a good idea to check and clean the connectors at the BCM and the PCM.

May be fuel injectors clogging.

The list goes on much further.

IF you can get access to a scan tool that is capable of taking a snap shot of the data stream when the problem is happening , you may be able to narrow this down quicker by seeing what conditions are present when the problem occurs.
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Sunday, June 8th, 2008 AT 11:19 AM
Tiny
BUZZSAW
  • MEMBER
A trans flush is at service intrival 60 k, you dont have a filter that is servicable unless you remove the trans, for a slight hesitation I would start with a throttle service which was also part of a 60k service every 30k is a major service, trans service, fuel filter, throttle body clean, tire rotation, brake ck and also I would recommend a brake fluid change, spark plugs come at 100k, all this is in your cars manual under servicing your car

if you are not servicing you car your only asking for trouble, and the prices you pay for things today it only mandatory that you do take care of it
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Monday, June 9th, 2008 AT 2:32 AM
Tiny
SERVICE WRITER
  • EXPERT
There you are.

Are you sure on the filter on the tranny? Alldata shows a part number and gives the normal 1.1 labor time with the re-usable gasket. Not that alldata is always right
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Monday, June 9th, 2008 AT 8:10 AM
Tiny
JOHN068
  • MEMBER
Thanks guys. I'll get it serviced.
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Monday, June 9th, 2008 AT 9:36 AM
Tiny
BUZZSAW
  • MEMBER
The only filters in the bottom pan are screens 2 of them, they can be cleaned, the paper filters are in the side pan
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Monday, June 9th, 2008 AT 12:46 PM
Tiny
SERVICE WRITER
  • EXPERT
That the funny thing about no having as much hands on experience. As a service writer I look up things and quote based on the norm.

Knowing now that they are able to be cleaned instead and having to replace them as well as having the reusable gasket, It means I just account for another tenth? Two tenths.

(What is fair to charge to clean it?)

Saves the customer money on the unneeded filter less the additional labor. Cool thing!
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Monday, June 9th, 2008 AT 7:42 PM

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