I've got a bit of a 4x4 prob.
91 4runner 3.0 4x auto.
when I shift into 4H it won't engage. If I shift down to 4L it will engage as if in 4h. Then the bad part...When it engages, it jerks and shimmies and feels like the rig is falling apart. When I disengage, it's normal driving in 2H.
I've checked all fluid levels, checked the vac and elect to the front dif and transfer case.
also worth noting, I replaced my trans and case less than a year ago, also cv joints and bearings. I could have messed things up during...wouldn't be the first time...
thanks in advance, JB