get the jr and run it .... the lmm's are fairly stout in stock form !!!

Just save up after that for a trans just so you are ready. you think you will only run x hp and later on you end up running xx hp or xxx hp ... so just do the jr for now, run the truck. It will let you know when it's unhappy and at that time you can decide what kind of kit you will be needing. I have seen these LMM's hold 450+ at the wheels with a 100% stock trans ... 1 truck even has over 100,000 miles on it...

run it !

oh and the install is basic. A clean work area is a must, you drop the pan, the filter and then the valve body. Dieselplace has a very good write up on it as well.

 

If your only gonna put a 100hp at it a Trans Jr will be fine. Mine held for a long time and never did limp it even with level 4 on the PPE.. Its the big gears that will slip so keep that in mind (4-5 an 5-6 shifts) Also for the 6 speed its a easy install with the Trans jr compared to the 5 sp. Then when you do get crazy and crank up the juice your Trans Jr will aready be installed. for your Suncoast IV

 

do all LMM's have 6 speed transmissions?

 

yes the 6-speed allison is the only option for any new duramax equipped gm hd truck