Engine/Transmission (1998.5 - 2002) question about billet output shaft

[SharpMotors]

thinking about installing a lock up switch in my 99 3500 4x4 that is curently running a dtt trans, convertor(90%),and valve body. question is i only have the billet input shaft not the out put shaft am i in danger of breaking the output shaft if i lock the convertor after it makes the 1st to 2nd gear shift then let it shift the rest of the gears with the convertor locked.



thanks for any info

 

[OPoole]

Stock Output shafts brake with boost lauches 15lbs. or more. . Call DTT 1 866 504 4002

 

[SteveFarley]

mine lasted till 25 plus launch

 

[paulb]

thinking about installing a lock up switch in my 99 3500 4x4 that is curently running a dtt trans, convertor(90%),and valve body. question is i only have the billet input shaft not the out put shaft am i in danger of breaking the output shaft if i lock the convertor after it makes the 1st to 2nd gear shift then let it shift the rest of the gears with the convertor locked.



thanks for any info

As recommended above, I would talk to DTT first, but... with a 90% TC you will probably not cause the output shaft to break if you let it shift locked 2-3 and the 3-4. High boost, 4x4 launches will break the stock output shaft. With the 90% TC you will probably not see that much of a decrease in E. T. (I'm assuming that you want to do this for drag racing... ). On my truck, and I only have the 89% TC, having it shift locked on the 2-3 shift only reduces the E. T. by about . 1 in the 1/4 mile. Your's may be a little different because mine is a 2002 and it shifts locked on the 3-4 from the factory, but I think you will be surprised on how little difference it will make in the 1/4 mile. Just to clarify I am only talking about DTT TC's, results from other manufactures TC's may vary. I think you would actually be more likely to break the output shaft by forgetting to unlock the TC when coming to a stop, then during the 2-3 shift.



my . 02's worth

Paul