Fourtrak - will not switch out of 4wd smoothly , drops out causing bang in xmission

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When I switch out of 4wd either using the low box or the 4wd button it does not drop out straight away and releases itself with a bang/shudder further down the road.
Its a 2001 fourtrak, 40k, with auto hubs on the front, serviced by myself from new, and the xmission/hubs have never been touched.
Any idea how to fix this , or what i can service
Thanks

4WD

Q-: are you changing on the move.

Q-: are you stopping and reversing a few yards to to disengage the auto front hubs after selecting 2HI

Edward (ews) '92 Fourtrak 2.8 TDX

Fourtrak - will not switch out of 4wd smoothly , drops out causi

hi
Q-: are you changing on the move.
A - sometimes, when in high box only, low speed though under 20mph

Q-: are you stopping and reversing a few yards to to disengage the auto front hubs after selecting 2HI
A- no have never tried this, usually have trailer/box on , will give it a try

Also a guy today suggested i try revving the engine harder when changing , any idea if this will help
regards
john harris

john harris

I have a factory fitted

I have a factory fitted sticker on the door of my sporty that tells you to reverse for a couple of meters to disengage 4wd. Guess it must be the norm.

"releases itself with a

"releases itself with a bang/shudder further down the road."

how far have you driven on the road in 4wd? perhaps the transmission has wound up , the torque locking the transfer box 4wd gears together even though they arnt held in by the selector mechanism,, till they suddenly release themselves Unknw

try going in and out of 4wd on grass without a trailer on to see if it goes smoothly then. if it does try changing to 2wd as soon an you hit the hard road.

"releases itself with a bang/shudder further down the road."

Hi Richard
I usually get 100 yards on the road before the 4wd drops out. I tried reversing tonight without a trailer and the 4wd dropped out, will try off road, with without a trailer this weekend
thanks
john harris

john harris

4wd shudder

Assuming auto hubs you must reverse the car to disengage them. If you don't then you will wind up the diffs.