# Transmission problem **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [July 27, 2007, 8:51pm UTC](https://community.cartalk.com/t/transmission-problem/2304 "2007-07-27T20:51:51Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![mazdagal](https://avatars.discourse-cdn.com/v4/letter/m/76d3ee/32.png) [@mazdagal](https://community.cartalk.com/u/mazdagal)\ **Post date:** [July 27, 2007, 8:51pm UTC](https://community.cartalk.com/t/transmission-problem/2304/1 "2007-07-27T20:51:51Z")
1997 Mazda protege 81K miles, auto transmission. having transmission shifting problems (or so I suspect). there are 2 different scenarios 1) happens always during highway driving: transition from 4th to 5th occurs anywhere between 45-55mph. once cruising at ~60mph (rpm is ~2.5K) , if I want to accelerate even a little tranny seems to downshift to 3rd (rpm goes to 3k +) and then returns to 4th quickly (rpm~2.75k). Is this normal or does it mean transmission or some sensor is being super sensitive (or I have a heavy foot!) 2) occasionally, again highway driving, tranny wont shift to to 4th even when I reached cruising speed (60-65mph) and backed off from gas enough. Then I back off to almost no pressure on gas medal, rpm seems to return to what it should be during cruising at that speed, but I end up slowing down and have to press gas and the cycle continues. At the suggestion of a few here, I checked transmission fluid (changed 22K miles ago) and seemed good color, no particles. I dont think my mechanic (not really a transmission expert!) cannot see the second problem, andthinks its my driving habits. So I observed more carefully : last couple of times it happened, I noticed I had accelerated hard to merge on the highway (i have to do it sometimes because my old clunker does not do a good job of it unless its a flat or a down sloping surface. any suggestions. thanks ---
**Author:** ![markmast](https://avatars.discourse-cdn.com/v4/letter/m/4af34b/32.png) [@markmast](https://community.cartalk.com/u/markmast)\ **Post date:** [July 27, 2007, 9:45pm UTC](https://community.cartalk.com/t/transmission-problem/2304/2 "2007-07-27T21:45:19Z")
do you know if your transmission is controlled by a computer or is it controlled the old fashioned way( with a valve body)? ---
**Author:** ![Areawide](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@Areawide](https://community.cartalk.com/u/Areawide)\ **Post date:** [July 28, 2007, 2:34am UTC](https://community.cartalk.com/t/transmission-problem/2304/3 "2007-07-28T02:34:27Z")
5th gear??? Automatic trans. ---
**Author:** ![mazdagal](https://avatars.discourse-cdn.com/v4/letter/m/76d3ee/32.png) [@mazdagal](https://community.cartalk.com/u/mazdagal)\ **Post date:** [July 30, 2007, 6:43pm UTC](https://community.cartalk.com/t/transmission-problem/2304/4 "2007-07-30T18:43:57Z")
I dont know if it is. But id does have a computer. does that mean computer must be controlling it ? (I know theres a computer because when I bought it, the mechanic who checked it out said the computer did not have any codes stored on it.)