VW 1.6TD Engine Off Coasting

[Hic]

Hmm, I believe there's further misunderstanding here. The condition VW provided is a disjunction, not a conjunction. The distance OR the speed will satisfy the condition of harm. It is the speed (rather than distance) that is relevant here. The negation of the distance doesn't mean the conditions necessary for gearbox harm aren't satisfied. That would only be the case if a conjunction (and) was used.

[ksa8907]

Originally Posted by Hic

Hmm, I believe there's further misunderstanding here. The condition VW provided is a disjunction, not a conjunction. The distance OR the speed will satisfy the condition of harm. It is the speed (rather than distance) that is relevant here. The negation of the distance doesn't mean the conditions necessary for gearbox harm aren't satisfied. That would only be the case if a conjunction (and) was used.

So.... Yes, you're damaging the transmission. You shouldn't do that.

Then again, it's a vw so it's probably going to break anyway.

[cRiPpLe_rOoStEr]

Those older manual transmissions rely more on splash lube than pressurized lube, so at least in theory EOC or towing above 80km/h shouldn't do any harm.

[Hic]

Originally Posted by cRiPpLe_rOoStEr

Those older manual transmissions rely more on splash lube than pressurized lube, so at least in theory EOC or towing above 80km/h shouldn't do any harm.

That's what I thought too, so I'm not sure why the manual states otherwise.

[Hic]

Originally Posted by ksa8907

So.... Yes, you're damaging the transmission. You shouldn't do that.

Then again, it's a vw so it's probably going to break anyway.

Yes, that is definitely what the manual states. As I've mentioned, "I'm curious if this does indeed harm the gearbox, and how it does so." Since you also agree that it does harm the transmission, how do you suppose it does so?

[oldtamiyaphile]

Your biggest gains from EOC are at speeds below 50 anyway.

[cRiPpLe_rOoStEr]

Originally Posted by Hic

I'm not sure why the manual states otherwise.

Who knows...

[ksa8907]

Originally Posted by Hic

Yes, that is definitely what the manual states. As I've mentioned, "I'm curious if this does indeed harm the gearbox, and how it does so." Since you also agree that it does harm the transmission, how do you suppose it does so?

Lol, because the mtg said so? I mean, they're only engineers who happened to also design the car so, I guess they don't know what they're talking about....

Likely, the residual oil in the bearings is enough to lubricate adequately UP TO 50 km OR UP TO 50km/hr. Longer distances and higher speeds will run through that residual oil and once gone will cause excessive friction and wear/scoring/gouging on the bearings.

This is one of those times where ymmv. Good luck, not worth the effort and small money saved in my opinion.

[cRiPpLe_rOoStEr]

Maybe you could try and check with those businesses that sell tow hitches for RVs. They usually have a list of what cars are safe for flat-towing and what ones require some preventive measure to prevent damage to the transmission.

[UFO]

Originally Posted by ksa8907

Lol, because the mtg said so? I mean, they're only engineers who happened to also design the car so, I guess they don't know what they're talking about....

Likely, the residual oil in the bearings is enough to lubricate adequately UP TO 50 km OR UP TO 50km/hr. Longer distances and higher speeds will run through that residual oil and once gone will cause excessive friction and wear/scoring/gouging on the bearings.

This is one of those times where ymmv. Good luck, not worth the effort and small money saved in my opinion.

There are many reasons for the manual to proscribe rolling with the engine off, not all of them having to do with actually damaging the transmission. My opinion, FWIW, is this is more of a safety issue with towing. Does anyone actually observe the speed limit for towing a U-Haul trailer?

And BTW, I don't EOC with my VW. I agree, the savings are not worth the risk for me, heh.