Why does my car rev up when i am going down hill while braking

Asked by Apr 04, 2014 at 01:52 PM about the 2007 Toyota Camry SE V6

Question type: Maintenance & Repair

When I am driving along and especially when I am going down hill and i'm hitting my brakes my RPM's will shoot to 3,000.  I have to put the car out of overdrive and back into overdrive so it will come back down to normal RPM's...really confused on this.. Car runs good

2 Answers

37,435

I think what is happening is that your car is just down shifting when you are applying the brakes. When a car down shifts to a lower gear, the RPM's will shoot up. When you are in the car next time, just put it in drive and go about 40 or so. Then drop it from D into 3 and watch your tach. You should see it shoot up when you down shifted into third.

9,855

Or. What is your RPM at before it jumps to 3000 rpm. Gas engines have more engine braking (compression braking) at higher RPM. Almost all new vehicles with automatic tranny's have a torque converter lock up to save fuel on the road. The PCM will unlock your torque conveter while braking to utilize the engine braking but this should not be noticable. Has the car had any other issues with the tranny, how is the fluid.

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