Hi guys having trouble with my truck shifting into 4th gear when truck pulling. It is a 2007 5.9 and i have a built dtt tranny in it. I set the high rpm to on in the programmer and it will turn about 3500 until the tranny shifts. The bad part is with the overdrive off button turned on it still hits 4th gear. Wanted to see if anyone else had this problem and if trying to ground out the overdrive solinode is the answer. Not sure how to do that but just looking for some help. Thanks

 

Drop it to 2nd on your gear selector

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Guys chime in does that seem right

 

thanks but I need the truck to run in 3rd gar to get he momemtum to get it farther down the track. 2nd just doesnt have enough go. thanks

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gear and the sorry for spelling

 

What tranny are you running? 68 or 48. Sorry im not up to date on the newer trucks. I have an 04.5. It was things like this that made me switch to nv4500 for pulling.

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On my 48re i had all sorts of problems with no shift, early shift, and late shift on the track. The problem with the 48re is the factory governor pressure solenoid cant handle the higher line pressures. There is a fix. People are using a gm solenoid. You can get the conversion from transmissioncenter.net but i gave up and swapped in a nv4500. You also might try different torque settings on your smarty

 

I have the 48. Still trying to figure out the wiring for the overdrive solenoid. I think I am going to ground it out.

 

wire in a TC lockup switch and run it in 2nd locked

 

thats the gear of choice round here for CR's ... works pretty darn well to

 

that with 4000rpm and a decent 33" tire works pretty good or if your up in the 700hp plus range 3rd locked

 

how does one of them work and can i get the switch from u guys. Also now i got it to run only in 3rd gear but when the TC locks its to low on rpms. I watch the tach lately and in second gear not locked it runs to 3600 and then 3rd is 3200 and when the TC locks in 3rd it drops to 2800 which is to low. I have the motor set up for 4000 and the computer wont let it run to 4000.I am running stock size tires. It also is stock for turbo injectors and injection pump. I am running an air dog 150 and smarty. Any info would help alot thanks

 

here ya go

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