Start from the four corners and work your way in. Check all wheel nuts to see if any are loose. If they are tight, remove each wheel and examine your hex nuts and drive pins on the axle. Be sure the axle pin is installed properly through the axle and seated in the hex. Verify nothing is stripped out or rounded off, also note the hex inside the wheel where the hex nut seats, be sure that isn’t worn or rounded off as well.
Once you’ve eliminated those things, check your drive shafts coming from the front and rear differentials to each wheel. Are they broken/ damaged/ worn? If so, repair or replace those. If not, continue to your center drive. Again, are they broken/ damaged/ worn? If so, repair or replace accordingly. Check your slipper to ensure it is set as Rolex had noted, examine your slipper friction pad if it is worn, replace it. Be sure you have a proper gear mesh as well.
Differentials aren’t that difficult to take out, so you may want to check them while examining your driveline. Follow the manual for detailed explosion of how to disassemble and reassemble these key components. You’re looking for worn surfaces, broken gears, etc… Be sure to re-lube your differentials when reassembling.
Also, while we’re waiting, could you please tell us the events that led up to your truck not pulling under its own power? Did you install the clutch on the engine properly? The clutch bell? Did you land a jump with your finger hard on the throttle? Any information you can give would help us diagnose the problem faster. As much as we’d like to, we can’t come over and look at it ourselves.
Good luck, hope we can help you get back on the road.
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