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1995 Seville SLS


tinvan1

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I have been getting " Service Engine Soon" message for last 6 years. I took to the dealer this year to decipher it. They say it may be transmission problem and they wanted $2500. It comes only when you are going uphill and accelerating.

Any suggestions what I should do? Do I need to update any software codes or chip?

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Your car has onboard diagnostics that will tell us more about what is happening. If you go to the main site page, at http://www.caddyinfo.com then click on the how-to section, you can find info on how to check diagnostic codes. Then post the codes you find here and usually someone can interpret them for you and advise.

Bruce

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This post described a similar problem. Pay attention to the reply posted by bbobynski (Al at the time).

My mother drove her 95 SLS about 400 miles on a trip. 300 miles

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into the trip the "service engine soon" light came on. The car

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ran fine and she continued her trip. I told her how to bring up

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the codes and PO 39 showed. That is a torque converter clutch

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problem. She took it to a dealer in connecticut(her

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destination) and they told her it needs a new tranny for $2000.

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My question is could this be something else? This car has

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60,000 babied miles! I mean the engine has probably never seen

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3000 rpm. Shouldn't the fluid smell burnt or at least the tranny

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slip or something. I think she is being taken. If it is the

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tranny Cadillac has some serious quality issues and I will not

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buy another one. My wife's has some problems(I've posted many

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of them here). But with 95,000 miles, the driveline is not one

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of them.

Jim, two things.....if the torque converter clutch is really inop

it might only be the torque converter....not the whole trans....

It is possible to test the operation of the torque converter

clutch very easily....with the car warmed up, etc...hold a steady

speed , up a slight grade is best so as to be crowding the

throttle slightly. With your left foot, lightly touch the brake

pedal. When the brake switch contacts, the torque converter

clutch will disengage. You will be able to feel the bump and see

the rpm rise on the tach. When you release the brake, the clutch

will reapply. If the clutch is working as described then it is

ok in all likelyhood. If no cluch apply is present either the

brake switch has gotten misadjusted or the clutch really isn't

working.

Some diagnosis may be necessary if the clutch isn't working. It

could be electrical or in the transmission.

The saddest thing in life is wasted talent

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