Q: Weird problem using cruise control on hills

asked by on October 29, 2015

I was just driving my 2010 Ford F-150 (automatic, 41k miles) on the highway with cruise control on. When the truck would come down one hill and begin going up the next (there are a lot of hills near me), the transmission would clunk badly enough for me to bounce out of my seat. These are pretty gentle hills, so I can't see why going uphill would be such an issue. What could cause this?

I did not have to look very far to find that this inconsistent shifting is a common issue across all models of the F-150 and transmissions used. Ford has several Technical Service Bulletins (TSB) that may cover your issue. The latest one I found is TSB 13-11-3 dated Nov. 1, 2013 and calls for your PowerTrain Control Module (PCM) and Transmission Control Module (TCM) to be reprogrammed with the latest calibrations. These updates are the result of engineers at Ford testing and adjusting their programs in response to customer complaints like yours. This should fix your problem, however, I would suggest you still have YourMechanic thoroughly test your vehicle and verify you do not have other problems and to verify your vehicle qualifies for the calibration update. After a calibration update the TSB calls for a through road test to ensure that the transmission shifting and engine work together smoothly.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

I can't drive at high speeds without the car shaking

Hi there. Your vehicle shaking over 60 km could be caused by several things. The possibilities include: tire separation and/or balance issues, bad shocks, bad springs, and possible driveline issues (u-joints, etc.). Securing the ramp/tailgate may be in order until...

My 95 Ranger shakes when accelerating from a complete stop.

Hey there. The different responses based on whether you are attempting to move forward or backward, suggests it might be a broken transmission or motor - allowing both to move around when the engine generates power for forward motion. Reverse...

Engine stalls when accelerating from idle

Hi there - excellent work, I commend you on your diagnostic skills! Yes, based on your description and testing, I would agree that the fuel pressure regulator is the most likely candidate for this problem. Bear in mind that a...

Front windshield wipers do not work--washers still work, fuse is good 2010 Dodge Nitro

Hi - the sudden nature of this failure would suggest a fuse or other electrical link, but you have checked the obvious. Further diagnosis is needed to determine which component in the electrical power chain has failed - switch, electrical...

Advice on buying a used Ford Ranger

They are both old cars, so my advice is to buy the 2001. If it's 3,000 dollars cheaper, and has the same mileage, then you should go for that. It's the mileage that is more important - that is the...

Just got tune up now water wont stay in reservoir and its hesistant...

Hello, and thank you for writing in. If the coolant in the overflow tank is being removed from the tank, then the cooling system is leaking. The smoke you are seeing is likely white and caused from the coolant either...

I just installed a new fuel pump on my 1995 f150 xl.. I had thought the pump was bad.. But come to find out that there is no power

Hi Micah. Thanks for contacting us today. Typically, when you have an issue like this, it's caused by either an exposed electrical wire that is creating a short or a blown fuse/relay. The best advice I can offer is for...

Sensor problem? Transmission overheating

Hi there. Your Focus has what is called a dual-clutch "automatic" transmission. Mechanically, it is a manual transmission with 2 clutches and servos, and other electronics used to handle the clutches and shifting such that it acts like a classic...

Brake fluid replaced, now car will not stop unless brake pedal is nearly to the floor.

One of the most common causes of the brake pedal going to the floor is a loss of brake fluid. Generally, this is easy to detect due to the fact that there is usually brake fluid leaking on the ground...

Related articles

A Buyer’s Guide to the 2012 Ford F-150
The The best-selling pickup truck in the US for over 30 years, the Ford F-150 has a lot to offer in reliability, durability, and the features that buyers want in a truck. The 2012 F-150 is not only a tough...
The Best Used Cars to Buy for Towing Light Loads
Towing Towing is tricky business and depending on the weight you’re dealing with, it really determines what vehicle is best for you. If it’s light loads you’re looking at towing, we’ve put together a list of the top five cars...
The Best Used Cars to Buy If You’re a Massage Therapist
If If you're a massage therapist, one of the cornerstones of your business has to be that you don’t keep your clients waiting. That means you need a vehicle that’s reliable. You also will have to move your gear, including...