OT 2009 ram 3500

avant 1735 · May 10, 2019

my ram truck (6 speed auto) has 145500 miles on it lately when loaded and pulliing a hill the rpm's will bounce between 2000 and 1500, on level ground no problem, if I back off of accelerator no problem, however the speed does not change, it does not run hot, I cant' smell anything burnig. Noting out of the ordinary. Has anyone else had this problem before? What is it? I thought is was torque converter, but don't know. Thanks for your input.

Michael Soldan · May 10, 2019

Check air filter.

MSM · May 10, 2019

Sounds like torque converter locking and unlocking, or overdrive dropping out when was trans serviced last?

avant 1735 · May 10, 2019

air filter and both transmission filters along with fresh oil were changed about 2 months ago

MARK ROBKE · May 10, 2019

Or the lock up converter is slipping. Mark.

4play · May 10, 2019

500 RPM change could be the T/C lock up but that is about difference in 5th to 6th gear change too. If you want to verify this, you can manually lockout 6th, in fact I wouldn't use 6th gear when loaded heavy, especially pulling hills. There is still a problem though, as it should not do that.

This really needs the TCM scanned for codes, and/or watch the trans data while driving it. These transmissions are fairly quick to find faults (slippage, shifting or electronic) and will set codes. Some things that can cause symptoms similar to this are TP sensor, brake lamp switch, internal trans electronics, or hydraulic.

shinnery · May 11, 2019

For clarification is this a CTD or gasser? If CTD an 09 would be a 6.7L??

Mark-Ia · May 11, 2019

My wife's car was doing something similar; it was the crankshaft sensor.

avant 1735 · May 12, 2019

6.7 diesel

OT 2009 ram 3500

avant 1735

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