Hi Have a 94 F150 XLT 4x4 auto hubs all stock. When on dirt roads I engage the 4x4 and about a hunderd or so yards later I hear awfull clunking/poping noises and the steering wheel twitches. Later on if I disengage the 4x4 about a hundered or so yards later I hear awfull clunking/poping noises and the steering wheel twitches. The 4x4 light comes on or goes off within second or two fo pushing the button. This is very repeatable.
I took the hubs apart and found one plastic spacer on the passenger side cracked. Otherwise there is no obvious problems or indication of gears grinding or not messhing. I am ording the spacer from ford tommorrow. Has anyone experienced this or have suggestions.
tia jimo