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Old Feb 20, 2007 | 11:44 PM
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when i am going between 70 and 80 at a steady speed, it feels like my overdrive will engage then disengage and i can see a 2 to 3 thousand rpm jump when it happens any suggestions?
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Old Feb 21, 2007 | 01:48 PM
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Originally Posted by counterC211
when i am going between 70 and 80 at a steady speed, it feels like my overdrive will engage then disengage and i can see a 2 to 3 thousand rpm jump when it happens any suggestions?

Does it happen on cruise control?
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Old Feb 21, 2007 | 02:33 PM
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what are the mods ?

any reprog done lately ?
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Old Feb 21, 2007 | 02:55 PM
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I had a similar issue with a different car. The radiator thermostat was sticking open so the car was not getting up to temp in cooler weather thus the tranny was staying in a higher gear. The transmission shop looked at it and told me to change the thermostat. I did and it cleared up and shifted properly.
I don't have my manual with me at this moment or it may say something about transmission fluid temp also.

Thus:

monitor you transmission fluid level (though I am not sure if the OD is fluid controlled), monitor the transmission fluid temp in the dic screen during the occurence,
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Old Feb 21, 2007 | 07:46 PM
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Your Converter Is Unlocking Then Locking Back Up.
Is It Real Windy Or On Hills ? If Not And The Converter Keeps Unlocking When Your At A Steady Mph In 4th.... Your Converter Or Lockup Solenoid Is Going Bad
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Old Feb 21, 2007 | 08:56 PM
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Default overdrive

i would check trans fluid level and condition, i just had trans service done recently at dealer, got car back and noticed trans shifted wierd in/out of overdrive and when i punched it could not go over 80 would bog out, took back to dealer found transmission fluid 1 1/2 qt low. p/u car test drove home and now it shifts great and goes into over drive
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Old Feb 22, 2007 | 07:14 AM
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2000-3000 rpm jump? Got to be more than torque converter lockup I would think.
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Old Feb 22, 2007 | 11:24 AM
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Sorry For My Info..... I Thought It Said 200 To 300 Rpm's
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Old Feb 24, 2007 | 10:08 PM
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thanks for the reponse i filled my trans fluid. and it does it too in cruise even after the trans fill it is still doing it after the fluid warms up. the only mods i have is an exaust.
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