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Restrictions when towing a Jimny - technical explanations

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16 Dec 2017 12:58 #187534 by facade
With the engine stopped, and the gearbox in neutral, all the gears are standing still, so there is nothing (except the synchro hubs, which are smooth) to throw oil around inside the gearbox.
The output shaft (main shaft) is turning though, through the centre of the stationary gears (and is above the level of the oil) so the tiny needle rollers and plain bushes around the output shaft will eventually run dry and fail.

The transfer box will be fine, as it is all rotating and flinging oil around as nature intended, although the chain slack will be on the other side.

Also Suzuki have to deal with numpties towing the car with dogs, and small children inside, who may knock it into gear, or engage 4x4, or who may have left it in 4x4 when it broke down, so they suggest removing the propshaft so nothing can happen, and the Ambulance chasers can't help sue them for millions because they "never told me not to tow it at 90mph with my foot on the clutch in 4wd and 1st gear" :pinch:

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
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  • 1066Boy
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16 Dec 2017 16:19 #187543 by 1066Boy
So in short, simple terms that I understand, its ok to tow it in a normal fashion with another vehicle as long as its only a short distance?

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16 Dec 2017 17:57 #187546 by facade
I'd have thought a couple of miles once in 10 years would be ok. I'd drop the rear propshaft off if it was going any distance.

(Basically, if it would take longer to remove the propshaft than to tow it home, I'd just tow it with it on)

In The Olden Days we used to just tow cars as far as we had to and never took any notice.

When the front pulley came apart on mine, the Nice AA man suspended towed it with the front wheels on the floor about 20 miles.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
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  • Ronstan
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19 Jan 2018 10:21 - 19 Jan 2018 10:38 #188559 by Ronstan

facade wrote: With the engine stopped, and the gearbox in neutral, all the gears are standing still, so there is nothing (except the synchro hubs, which are smooth) to throw oil around inside the gearbox.
The output shaft (main shaft) is turning though, through the centre of the stationary gears (and is above the level of the oil) so the tiny needle rollers and plain bushes around the output shaft will eventually run dry and fail." :pinch:


But the same applies to regular cars with manual gearbox. Why than there are no warnings in manuals?
And what if we leave engine idling? The input and counter shafts will be turning so there is a splash lubrication. Would it be a solution?
Last edit: 19 Jan 2018 10:38 by Ronstan. Reason: Another thought

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19 Jan 2018 19:05 #188589 by 1066Boy
Ronstan, just seen your signature. Nice to have another ex-Niva owner on here. :)

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20 Jan 2018 01:43 #188601 by Ronstan
Haha, mixed fillings related with Niva ;)

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