Question about 2002 Chevrolet Silverado 2500HD

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02 duramax transmission

I was pulling a descent size load and started over a hill with my cruise set. the truck continued to rev up into overdrive put i was losing speed. another instance i was going over a hill and the truck remained started but kicked itself out of gear. 2 days later i went to take off and the truck wouldnt go. so i killed the engine and restarted it and it took off. any help??? or sound familiar...

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Transmission seams to go into neutral while driving then then slams back into gear it only seams to happen when coasting 25 - 35 mph can transmission position switch cause this


Transmission slipping into neutral. - Ford Truck Enthusiasts Forums

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For a Ford 2006 expedition Xlt do I drive with overdrive on or off. I'm not pulling anything and this is my first t suv


Your owners manual should explain how overdrive works.
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The only time you drive with overdrive off is when you are descending a steep hill or pulling a load.

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Travelling at 100 klh @ 2000 revs kicked down in Polo-revs up to 4500 but would not move up gear(s)


run the fault codes to check for TCM or other problem sensor in the transmission. It may be a protection item as it is unwise to kick down at that speed as kickdowns are used to change to lower gears when going up hill or pulling a load and need a lower gear . They are not meant to pass at speed .It is the same effect bas with a manual in overdrive at 100klms and suddenly shifting into 1st gear

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When to use overdrive


More simply put is when to NOT use overdrive - when pulling a trailer or climbing a long hill. The automatic transmission will shift into overdrive whenever the engine is under light loading and will save you fuel.

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Not sure when overdrive is on or off


Overdrive acts like a final gear. It's easily noticed if it is on or off when cruising at higher speeds, as when operating the switch you will notice the engine revs alternate between higher and lower rev ranges.
When the engine revs drop, then overdrive is on, and when they rise, then it is effectively off.

The overdrive function works just like any other gear in that it reduces the torque from the engine to the wheels, and allows the engine speed to drop. This isn't always beneficial when climbing hills or towing however, or when driving hard, as you may prefer that the gearbox wasn't always changing gear into overdrive, as overdrive reduces the torque from the engine as a means to increase fuel economy and reduce stress. It is for this reason that the overdrive can be disengaged, effectively reducing the number of gears in the gearbox which you have available to you.

So simply put, for most drivers, in most circumstances, they will not need to turn the overdrive off.

In answer to the light on/off, the majority of vehicles have overdrive in the 'OFF' position when the light is on. It's a reminder light (amber) that you likely aren't employing the best fuel saving technique.

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I have a 95 f250 powerstroke diesel, automatic, since yesterday the transmission has been slipping between 3rd and overdrive. the problem started while hauling a fairly light horse trailer and the...


You should not use overdrive unless you are steadily going highway speeds. I had one of those and my ex liked to use cruise control on windy coastal roads. This caused it to shift back and forth from 3rd to overdrive constantly. So I disconnected the cruise control so he couldn't use it. Lol. I'm not suggesting this for you. You should keep overdrive off for now and have your transmission serviced. New filter & oil & flush the cooler. Make sure you ONLY USE THE RECOMMENDED FLUIDS!!!!!!!!!! See if that helps. Do not use overdrive pulling a trailer and going up a hill and do not use it if you are on windy roads where you are slowing down alot of times. Try letting off the gas for a second when you do want to engage the overdrive. Remember to always check your automatic tranny fluid with the engine running and fully warmed up.

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When going up a good size hill or under strain (lead foot) on flat ground, my 2000 Jetta TDI seems to instantaneously drop power (feels like going into overdrive on an automatic). It then has no power to...


it sounds like a wire is bad/ shorting out. Put it in a dark garage open the hood have someone start it while you look under the hood if they give it a little fuel you will see an arc from the bad wire.

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CVT problem


Simple answer, no, it will not most likely cause any increased wear to your engine or transmission. Yes, it is normal for the engine to rev while climbing a hill while in cruise control.

The cruise is designed to be used on flat (or semi-flat) stretches of highway at 55mph or higher so you don't have to hold the fuel pedal the whole time and your foot doesn't get tired. The cruise control system will try it's best to keep your vehicle rolling at the set speed, increasing/decreasing the throttle to compensate for changes in engine load.

If you are driving with cruise on, try lightly putting your foot on the pedal and you might notice that the system will actually move the pedal itself. If you are in cruise, and you come up to a large hill, try putting your foot on the pedal and getting it up the hill on your own w/o cruise then resetting cruise once you are off the hill.

Also, cruise is not supposed to be used in moderate/ thick traffic or on country roads with a lot of rolling hills. The cruise control system is a "dumb" system meaning (not that it's pointless) but it will only change the pedal as the speed changes and it has no idea what's coming up next, even while you are already on the hill.

So, it is normal operation of the cruise control to try to compensate for a hill by constantly revving up the engine and letting it fall back down to try to keep moving at the exact same speed you set it for. If this is a bother, you can always use your foot to hold the pedal while climbing the hill normally.

Don't worry, it won't cause any increased wear and tear on your vehicle. I hope this helps. Good luck and don't forget to rate! Thank you!

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