2005 Diesel moving when brake is depressed.
#1
09-01-2015 | 03:14 PM
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2005 Diesel moving when brake is depressed.
My 2005 Dodge 2500 Diesel 2WD is trying to move my truck forward even when I have the brake depressed. It pushed me out into traffic recently. When I shift out of drive to Park or Neutral, my rpms shoot up and then return to normal, sometimes the truck shakes during this time but not always. Truck seems to run fine on the highway. This issue only happen randomly not all the time. Also it sometimes on slowing down cuts out not like gas issue but like it doesn't know to stop or go.
All this started a few months back when it just died in traffic one day making me think it was the S belt which it wasn't. The service engine soon light came on one time but not since then. No place seems to be able to figure out the issue without a hard code. I am at a loss. I have replaced both batteries, one side battery cable and alternator cables, changed the fuel and air filters and the brakes. Any place I take it wants to just start replacing things one at a time until they find the issue. I cannot afford that. These issues do not arise all the time so when they drive it they say nothing is wrong. I need helpful advice. I am a single woman with just enough car knowledge to get me in trouble. 
Last edited by BJT; 09-01-2015 at 03:31 PM.
#3
09-01-2015 | 03:49 PM
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A quick guess would be the torque converter in your transmission. I believe diesels are the same as gassers and have a lock up torque converter. At a predetermined speed the torque converter locks up like a direct drive to increase fuel mileage. Normally when you slow to a stop the torque converter releases or unlocks and allows you to stop while in drive. If it does not release or unlock, the direct drive is still engaged and your engine is fighting your brakes and continues to drive forward...just like trying to stop a standard transmission vehicle without pushing the clutch in. The rpms are flaring up when you shift to neutral because the computer is sensing low engine rpms.. (from your brakes trying to stop engine).
Last edited by TrueDogman; 09-01-2015 at 03:52 PM.
#4
09-01-2015 | 03:54 PM
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A quick guess would be the torque converter in your transmission. I believe diesels are the same as gassers and have a lock up torque converter. At a predetermined speed the torque converter locks up like a direct drive to increase fuel mileage. Normally when you slow to a stop the torque converter releases or unlocks and allows you to stop while in drive. If it does not release or unlock, the direct drive is still engaged and your engine is fighting your brakes and continues to drive forward...just like trying to stop a standard transmission vehicle without pushing the clutch in. The rpms are flaring up when you shift to neutral because the computer is sensing low engine rpms.
#7
09-01-2015 | 03:59 PM
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#8
09-01-2015 | 04:45 PM
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Yes true...with an automatic transmission. Try this with a standard transmission....you will either break something...or the brakes well not hold. The lock up torque converter provides a direct solid link between the crankshaft and the rear differential.
#9
09-01-2015 | 04:48 PM
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#10
09-01-2015 | 04:58 PM
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Some ideas here for you BJT. Read all three pages
http://www.cumminsforum.com/forum/3r...oot-brake.html
http://www.cumminsforum.com/forum/3r...oot-brake.html
Last edited by TrueDogman; 09-01-2015 at 05:03 PM.