Re:Re:Re:Will fitting rear freewheel hubs to my Gen 4 Jimny allow me to flat tow the vehicle

it is not the diffs that is the issue. the SA 4x4 forum has discussed this many many times. it is transfer case that can be the problem. Both transfer case and main gearbox back driven in neutral can be damaged due to lack of lubrication.

only real way to limit damage is to take off prop shaftt.

free floating will not adress the issue, of flat towing. this issue only started really with gen 3.


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I fully agree that "bodging" the braking system is a big no-no in any situation but surely you need to know how a person set up the system before a claim can be made that it was bodged ?

Roger

If you turn the half shaft from a wheel you turn the diff. and that churns up the oil and everything gets lubricated. Why then if you turn the propshaft which turns the T-box will you have a problem re: lubrication as the gears in the box will be churning around in oil?
Ditto the main box, manual of course.

Roger.

wrote:

I would assume that the gear rotation along with the case casting are designed to pickup and splash oil around in the forward direction of motion and not the reverse direction of motion. There are certainly casting shapes around the gears where they fit into the case

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True, but the gears are all still turning forwards when the car goes forwards. I like your idea that they couldn't be bothered hardening the diff teeth properly and they wear more on the overrun faces though.

I still think it is the gearbox. When the engine is stopped, all the gears are standing still and there is nothing to splash oil around, which doesn't matter for most of the stationary bearings, but the rear bearing is turning, and the main shaft is turning inside the stationary gears wearing out the bushes.

Facade has got a point here. Looking at a view of the manual box, the mainshaft is split into 2 and the 5th gear synchro is the join point. This means that the output shaft will be turning but the rest of the gears and shafts will be stationary. This is probably why Suzuki allow short distance "get you home" towing but nothing else. On my SJ the T.box had a neutral so it was easy to isolate the main box. Maybe the later box was a retrograde step.

Roger