Diff Lock

Came out from a friends house last night to find I had a flat rear tyre. Locked the central diff lock as per handbook instruction and changed wheel.

Drove home about a mile with the diff still engaged as I could not get it to disengage. I tried reversing (maybe not enough) to free it . I could "feel it" winding up . When I got home I jacked the rear axle and the transmission unwound(the wheels moved)

Question: 1 Is this likely to cause any damage to the drive line.(Auto box)

2 Is it possible to unlock the central diff by reversing a short distance.
Reply to
Simon Mills
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Eventually yes it would damage the driveline, over a short distance unlikely unless you were very heavy with the right foot and making tight turns.

The secret is to get no windup in the drive line this can be by driving a short distance in reverse, putting one set of wheels in the dirt/grass/or other less tractive surface. In a manual its usually easiest to quickly back off the throttle and it should disengage. In earlier vehicles with the vacuum diff lock sometimes a squirt of WD40 into the diff lock switch worked wonders as they tend to leak air into the switch.

Reply to
Jason.Goods

IMO no, the cost is in fuel consumption and tyre scrub.

Should be, the trick is to make the load come off the central diff so the dogs can retract under their spring pressure. Making the front drive train cover more distance than the back, or vice versa, is what allows this. So driving backwards turning from lock to lock should achieve this. Spinning a wheel on soft ground and slowing down sometimes works.

AJH

Reply to
sylva

Twas Sat, 25 Sep 2004 23:51:02 GMT when "Simon Mills" put finger to keyboard producing:

Unlikely

when mine stays locked I find reversing usually does the trick, 10 feet or so. I hear also bumping up a kerb lets one wheel spin freely for a moment and can do the job (not needed to try that myself).

Regards. Mark.(AKA, Mr.Nice.)

Reply to
Mr.Nice.

The answer is either "no" or a big bang and something broken - e.g. half shaft. I don't think there's an in between.

Reply to
hugh

In message , Mr. Nice. writes

I believe that's mandatory about every 15 miles or so in a 6 wheel drive Scammel!!

Reply to
hugh

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