B1750 HSD 4x4 no go...

[alchemysa]

My money says the problem lies in the Bi-speed area. .

I was going to suggest that too, except easytractor said the front wheels wouldnt turn even when they were hanging in the air. That must be a very burnt out set of clutches to have no grip at all! But if you've already taken yours apart twice I'd reckon you know what you are talking about.

 

[B2400]

You're right, even toasted they should transmit some power. That leaves a backed off pinion nut or a stripped driveshaft the way I see it. The Bi-Speed unit may be different on the 1750 as compared to my 2400 also. I'm thinking the 1750 uses a normal ring and pinion whereas the 2400 uses a similar but more compact bevel drive. This may make some difference as to how your Bi-Speed transmission works.