by MMiller » Mon Jun 08, 2009 6:31 am
Looking pretty good. I agree that low 3rd would be a good choice.
I'd be scared to use high side anything hooked to the sled. I've seen way to many trucks break the input shaft of the t-case, or the coupler when using high side. Even v-8 gas trucks with old 4 speeds and 205s. Put your gear reduction as far away from the trans as possible.
Have you seen any of the videos of 2nd gear hi letting go in a diesel puller? A buddy of mine, with a p-pumped 24 valve lost the engine when the transfer case input broke.
Another friend of mine has a p-pumped offroad truck with 727/205 combo with rockwells. He wheeled it Memorial day weekend. He put it in hi-4 to run up a sand hill and sheared off the input in the t-case. That particular truck is running stock charger, no intercooler, and a tight convertor. The co-pilot saw 40 psi of boost going up the sand hill. Granted the auto has a smaller input, it was a 4000# offroad truck blasting up a sand hill, not pulling anything.
Michael
1993 W250, 3.55, NV5600 , Con O, bosch 185's, 4" exhaust, Super 40, pump tweaks, ground pin, Smokehouse air intake, Hamilton Cam,
1985 D350, Crew Cab, 92 cummins and a 518. 47rh to be built and installed along with 3.55 LS Dana 80