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-   -   dodge wont rev above 2000 RPM's w/ 6 speed (https://www.dieselbombers.com/24-valve-2nd-gen-dodge-cummins-98-5-02/37609-dodge-wont-rev-above-2000-rpms-w-6-speed.html)

dieseldocter16 12-03-2009 05:32 PM

dodge wont rev above 2000 RPM's w/ 6 speed
 
I finished my auto to Nv5600 6 speed swap today in my 01 Ram 2500 and when i took it out for a test drive it wouldnt rev above 2000 rpm's. It feels like it's in limp mode however there are no dash MIL lights and when I scanned it there were no DTC's. Am I going to have to get computers out of a manual trans truck or could it be something else? :humm:

blkjack 12-03-2009 05:54 PM

:humm:Im thinkin first off you will need to get a ecm for a 6spd truck and start there

tdiezel 12-03-2009 07:25 PM

Would the ECM really cause that problem? I suppose because it is controlling the motor for an auto instead of the manual tranny, blkjack may have your solution. It should be something really simple since the 5600 is, I think, almost completely independent of the computer because it doesn't tell the transmission to shift. Maybe its a computer problem and it is the ECM as mentioned before. I would do some calling around and see what you can find out about the 6spd and see if there is a difference when dealing with the different type of transmission vs ECM/computer.

mysterync 12-03-2009 07:54 PM

The PCM Controls the transmission. Have you Checked the map sensor and tps sensor?
It could be related to the auto to manual swap but it would throw a code most likely.

cumminspwrram59 12-04-2009 03:34 PM

try the tps sensor when i ordered mine for my auto they asked if it was an auto or stick. i know they are more expensive tho

toxictrav 12-07-2009 11:23 AM

i did an auto to manual swap myself on my truck and it did the same thing. I had a superchip on it at the time. I put the truck back to stock and then re-loaded the superchip and it fixed it. idk if maybe the chip had a memory stored from the auto or what the deal was but my truck acted the same way your is, rev good to 2000 and then fall on its face. if you have a chip on it you might try this. hopefully it helps

Beast2B 12-07-2009 11:50 AM

i have a spare ecm from my truck (2001 HO 6-speed) that I would lend you for testing. it is a CA truck, but Bob Wagner (smartypower.com) said that shouldn't matter. he might be able to help sort out the issue as well.

bajabomber87 02-28-2010 12:47 AM

What did you end up doing to fix this? Mine's doing the same thing now after my swap.

830cummins410 02-28-2010 09:04 AM

i was lookin into doin the same thing on my old 02 and was told you have to have the computer to match the tranny and that on some models the vp44s are difrent from a manual to an auto tranny

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you may also look at the turbo i know there is a dif between the way they build boost from a manual to an auto i cant remember exactly what it is but there is a difrence

RAW 02-28-2010 09:11 AM

Different turbo's. Auto came with HY35's, Manual HX35's.

auto trans md 01-21-2021 09:16 AM


Originally Posted by dieseldocter16 (Post 444307)
I finished my auto to Nv5600 6 speed swap today in my 01 Ram 2500 and when i took it out for a test drive it wouldnt rev above 2000 rpm's. It feels like it's in limp mode however there are no dash MIL lights and when I scanned it there were no DTC's. Am I going to have to get computers out of a manual trans truck or could it be something else? :humm:

How it going, were you ever able to figure out why it would not go over 2000o rpms? I am having the same issue on one that we swapped a 24v into a ford f550.


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