BULLRAM
Senior Member
Hello, I have a 2009 Dodge Ram 5.7 with 150,000 miles, the transmission shifted perfectly until a few weeks ago, I knew by the codes that the clutches were gone, I pull a heavy trailer, I had my transmission rebuilt and all was good, I decided to try a Diablo tuner instead of my Superchips, I have never had a problem one with the superchips tuner and I have the trans tune, after putting in the diablo tune with 91 tune I added the throttle sensitivity percent and it woke truck up COMPLETELY, after about a week I was going to try and get on the freeway had it at 40 mph and floored it to get out on the traffic, it went jerk, jerk ,jerk ,jerk--4 times them hits really hard downshift....it seemed like it was slipping, I repeated this MANY times to verify, so I removed the tune altogether and tried it again, it still did it, I took the transmission to the same reputable shop they put a new valve body and solenoid pack put it back together and it still did it, (IT SHIFTS PERFECT IN ANY OTHER WAY ) just not the downshift at 40MPH, they took it back in and took the transmission apart to check it over more closely and found nothing, they ordered and installed a different transmission that was rebuilt ( I saw the new transmission) and now it still does it exactly like before , Jerks 4 times then downshifts hard and it flies-----I am getting it back today and they told me it is doing the same thing, asking if the Diablo could have messed up the ECU , or maybe the tune did not fully get out of the computer ? the tuner is unlocked and I put the stock back in but no one knows what is going on, I am not trying to bash diablo but NO ONE can figure out what is going on with my truck. I am trying to get in contact with Diablo maybe they can tell me what is going on? I apologize this was so long of a post.