06 Dodge 2500 Cummins auto feels like a harsh erratic shift up or down, or very hard converter lock or unlock. May happen 2 or 3 times in 5 minutes, or once a month. It happens whether it is towing or empty, if my wife or I drive. Usually around 50 to 70 mph. May happen more often under acceleration.
Feels like the old style shift kits when they hammered the clutches closed. Sometimes very violent.
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www.cumminsforum.com > ... > 3rd Gen. Powertrain Jun 5, 2010 - 9 posts - 7 authors
I have an 06 Dodge 5.9L that has a light white smoke and rough idle when first ... 2006Ram 2500 QCSB 4x4, 3" Carli coils w/ 1" Daystar spacer, ... Still ran good tho, dispite the exact conditions you describe on Cold Start up.
sounds like you may havea torque converter lockup issue, one way to check is while in slower traffic (15-35mph) gear down your transmission such that you are at a higher rpm (2000-2500) then take your foot all the way off the throttle, if it is in lockup your engine rpm will stay about the same, if not it will go to about idle.
If the tcc doesn't unlock while shifting it will shift very hard and if it slips it will make your temperature increase
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Shift suddenly become very hard. When going from park to either
reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh.
All gears seems to work. Problem may be intermittent: Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace.
Extremely harsh shifts from P or N, normal shifts at WOT: EPC
(Electronic Pressure Control) solenoid failed. Easy fix in pan. Fix as
soon as possible or hard parts will eventually break.
No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.
Car goes into gear but feels very sluggish like the brakes are dragging,
but it will roll easily (starts out in 4th gear), you manually shift to
2 to get it moving, once it's moving you put it back in OD and the car
shifts 3rd to 4th on its own and locks the converter at the appropriate
time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem
from PCM to trans.. or PCM.
easy to test with vom, just check from terminal on injector to ground if one reads different thats the problem, you do need to disconnect wire to check, my help is free and will be glad to help further just vote fixa..LOL my rating is all I care about. Hope yu can help me too.