My 1996 Cadillac Seville won't shift into overdrive. Any suggestions???

Asked by Oct 14, 2014 at 10:21 AM about the 1996 Cadillac Seville STS

Question type: Maintenance & Repair

When driving 45 mph or less the car operates at about 1800 rpm.
55 = 2100 rpm
65 = 2500 rpm
75 = 3100 rpm  
The transmission starts to get hot at speeds above 55 mph. If I stay off the interstate the car runs perfectly. I just had a major tune up, other than the high operating speed and a slight increase in temperature (I constantly monitored the temp when driving for diagnostics) the car is running perfectly. The car has 117,000 miles. Also, this car lived in Alaska for the first 18 years of its life. I recently relocated to Florida, I'm pretty sure that my car does not like the hot temps!

7 Answers

261,555

The overdrive band in your transmission might be burnt not allowing it to engage keeping your rpms high. Only way to fix is to replace, which always means a transmission rebuild. Drive it as is until you can repair it, or consider another vehicle.

1 of 1 people found this helpful.

Thank you Tom. That is what I figured. It is good to know how to get the most out of it before I move on.

7,965

have u ever replaced the vacuum modulator?

2 of 2 people found this helpful.

No Jason, I have not. Would it be worth doing this?

7,965

it is worth a try.. you can do it on your own. it is inexpensive.

20

Where is vacuum modulator located.

2 of 2 people found this helpful.
10

"Overdrive band" ??? I have been told there is none on this tranny, it is electric and uses an auxiliary steel gear with an electric solenoid. Who is right? Is this a "throw-away" GM transmission?

1 of 1 people found this helpful.

Your Answer

Seville

Looking for a Used Seville in your area?

CarGurus has 314 nationwide Seville listings starting at $2,000.

ZIP:

Cadillac Seville Experts

  • #1
    Tom Demyan
    Reputation
    400
  • #2
    carpetguy53
    Reputation
    340
  • #3
    Js08016
    Reputation
    320
View All

Related Models For Sale

Used Cadillac DeVille
3 Great Deals out of 1,511 listings starting at $1,999
Used Chevrolet Impala
543 Great Deals out of 34,842 listings starting at $990
Used Chevrolet Corvette
184 Great Deals out of 18,578 listings starting at $3,941
Used Lincoln Town Car
28 Great Deals out of 1,724 listings starting at $1,004
Used BMW 7 Series
100 Great Deals out of 5,253 listings starting at $2,999
Used Chevrolet Tahoe
764 Great Deals out of 41,930 listings starting at $1,980

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.