99 To 01 Swap.....Trans not right!! - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 3 (permalink) Old 10-18-2011, 12:05 AM Thread Starter
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99 To 01 Swap.....Trans not right!!

I swapped out my junk 99 motor for an 01 motor. Just swapped out the ECM's for the 01 ECM's. Now I don't have 4th gear or lock up. I can get 3rd gear lock up if I use my switch but still no 4th. Wondering if this is a re flash issue or something else. I had 4th and lock up when I put it in the garage to swap ECM's and when I pulled it out 30 mins later it wasn't there. The ECM was for an 01 cummins 2500 with an automatic trans. Mine is a 99 cummins 2500 with an automatic trans. Any help would be great!
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post #2 of 3 (permalink) Old 10-18-2011, 05:23 PM
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it's the valve body solenoids. they are different between the years. swap them out and life will be good.

01 quad cab 4x4, edge drag comp, 4" exhaust, fass 150, 250 ddps, Jefferson State compounds 683hp so vp 11.91. AMSOIL front to rear. now back to stock 95 fummins in the works
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post #3 of 3 (permalink) Old 10-18-2011, 10:00 PM Thread Starter
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Okay cool. I was also told today the PCMs form 99 to 01 maybe pinned different for lock up and the 3-4 shift. I just don't know what pins to look at. I can't find a diagram for it.
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