dp motor home enough power ?

Just off the top of my head it sounds like the motorhome was bogging down on the soft soil. The engine was trying to overcome the dips it made into the ground to try and go up over the 1.5 inch concrete squares.

The engine was trying move six tires that were on soil so I think that was the cause of you needing to rock the coach.

MM.

Mr. Mark is right, you were probably sinking slightly into the soft soil and the blocks were acting as chocks.

I'm sure your DP has enough power to climb up a cement block.

thanks for the reply's what I will do is try it on the drive way when I move it next time to see if it will climb the 1 1/2 block. just to see !!!!

Don't put a block against every wheel, move a couple back just a couple inches.

My 31,000 lb rig with 300HP 8.3L Cummins will climb a 2x12 laid on concrete with ease. It will also crush one of those plastic chocks with ease.

Actually I use three 2x12 fastened together as a ramp for underneath access.

were you on grass or concrete ?

Is the engine output managed in 1st gear? When you say it was floored, did the engine really ramp up or did it seem bogged down? I have read of some vehicles where the computer limits the output in 1st gear to protect drive train components. This can cause problems like you experienced, or if you have a toad and are trying to pull away from a stop going up hill (remember reading a post on this situation). If the engine is being limited, it may bairly be allowed to get over the torque converter stall RPM until the vehicle is actually moving. Any extra torque requirement and a stopped vehicle won't move. You absolutly should be able to drive up a 1.5" block!

I was in reverse. have not tried it in forward ? the motor seemed to stay at a steady rpm it did not try to stall from bogging ? thanks

Seems to me like it should not have any problems climbing over 1 1/2" boards. My coach weighs 30K and I use portable ramps on the curb to get into its parking driveway, and it will climb at least six inches with no problem.

Have you changed your transmission fluid?

how much boost were you getting?
And what will it do in first going forward?
Reverse could be power limited.
Assuming your 96 325hp is an isc... you should be pulling near 35 psi of boost...