Superdave Posted May 14, 2009 Share Posted May 14, 2009 Does any one know if the Leyland Daf 4x4 actually has a diff locker or does the switch on the dash just actuate something on the transfecase?? I read somewhere that the truck is in full time four wheel drive and you activate the Diff lock when the truck starts to slip. I looked at the axles but I do not really see if there is some kind of line/wire to actually lock up the Diff or Diffs on the truck. Quote Link to comment Share on other sites More sharing options...
petop Posted May 14, 2009 Share Posted May 14, 2009 It is Perm 4 Wheel Drive. The big lever sticking out of the dash is the Hi and Low. The button, if i can remember maybe tranverse diff or inter axle. Quote Link to comment Share on other sites More sharing options...
Butch Posted May 14, 2009 Share Posted May 14, 2009 Does any one know if the Leyland Daf 4x4 actually has a diff locker or does the switch on the dash just actuate something on the transfecase?? I read somewhere that the truck is in full time four wheel drive and you activate the Diff lock when the truck starts to slip. I looked at the axles but I do not really see if there is some kind of line/wire to actually lock up the Diff or Diffs on the truck. The difflock button only locks up the transfer box so you still only get 1 front and 1 back wheel spinning when its locked ! Quote Link to comment Share on other sites More sharing options...
Superdave Posted May 15, 2009 Author Share Posted May 15, 2009 So Basically the button on the dash engages the front drive shaft in the transfercase?? Quote Link to comment Share on other sites More sharing options...
Butch Posted May 15, 2009 Share Posted May 15, 2009 So Basically the button on the dash engages the front drive shaft in the transfercase?? No, there is a viscous coulping the same as a Landrover in the transferbox and the button locks that up. Without the diff in, the drive can go to the back or the front axle , whatever loses trackion first . Quote Link to comment Share on other sites More sharing options...
Superdave Posted May 16, 2009 Author Share Posted May 16, 2009 Thanks for the description Butch I understand how it works now. Quote Link to comment Share on other sites More sharing options...
Stormin Posted May 16, 2009 Share Posted May 16, 2009 No, there is a viscous coulping the same as a Landrover in the transferbox and the button locks that up. Without the diff in, the drive can go to the back or the front axle , whatever loses trackion first . Are you sure it's a viscous coupling? These limit the speed difference between front to rear props so no need to mechanicaly lock up. I feel fairly sure it's just an open diff with a mechanical locking device. If it was a viscous centre coupling then it would make sense for the diff lock to act on the rear axle only. If there's no viscous coupling then a diff lock would be more effective on the centre diff than across an axle. Reason being, it's more likely two wheels on an axle are in the same situation traction wise, and the other axle is more likely to get grip. Quote Link to comment Share on other sites More sharing options...
Butch Posted May 17, 2009 Share Posted May 17, 2009 Are you sure it's a viscous coupling? These limit the speed difference between front to rear props so no need to mechanicaly lock up. I feel fairly sure it's just an open diff with a mechanical locking device. If it was a viscous centre coupling then it would make sense for the diff lock to act on the rear axle only. If there's no viscous coupling then a diff lock would be more effective on the centre diff than across an axle. Reason being, it's more likely two wheels on an axle are in the same situation traction wise, and the other axle is more likely to get grip. Your quite right i've just looked in the ASPs,it is a mechical locking diff with drive being splite 33% front 67% rear when not in use. Quote Link to comment Share on other sites More sharing options...
Superdave Posted May 18, 2009 Author Share Posted May 18, 2009 Thanks for the clarification. Quote Link to comment Share on other sites More sharing options...
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