my guess would be that it is stuck in high ratio 4x4, either the yellow knob is depressed or the internal mechanism is stuck.   
 
jon
		 
		
		
		
		
		
		
			
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				1950 Land Rover series 1 
1967 Land Rover series 2A LWB 
1986 Land Rover series 3 SWB 
1938 DKW SB200 
1944 DKW NZ350-1 
1967 Ural K750 sidecar outfit 
1944 VW Kubelwagen KDF82 
1942 Steyr 1500A 
1944 Morris C8A 
1943 Chevrolet CMP8A HUP? 
194? Bedford QL
			 
		
		
		
		
		
	
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