I found this while searching...

"You should not coast any manual transmission. What happens, example: engine rpm= 750. driveshaft rpm= 2000 or above. drivshaft spinning much faster than cluster gear (countershaft, in trans.) This generates heat very quickly. Over many times of coasting (in neutral), gears on mainshaft, and needle bearings (inside of mainshaft gears) gauld or weld themselves together. I recall one manual trans. that welded the mainshaft pilot (needle brg's.) to the mainshaft. I have rebuilt & repaired many manual transmissions. Again, coasting (in neutral) or towing, without unhooking the driveshaft--equates into "MAJOR" damages."

 

umm, when you engage the clutch, arn't you, in effect, "in neutral?"

 

sounds like RWD he is talking about....and why would you unhook the driveshaft ....I dont beleive if

 

well he does say..."ANY MANUAL TRANSMISSION"

 

I think it is bullshit ...I mean coasting or not has no effect...the driveshafts spin just that fast under load on the freeway...so I dont see how it could do any more damage by coastin

 

well.... im gonna try and sound like an expert cause i was told this by a mechanic when my dad would coast his 78 toyota truck down our hill to work everyday, sometimes he didnt even turn the car on and eventauly it caused a problem ...... but i realy dont remember what he said..... something to the extent of theres not the equal pressure of oil required to lubricate or something..... i dunno.. you guys try work off of that

 

the problem is that the main shaft is on spinning the same speed as the countershaft, so it creates heat... Big deal on a honda? Doubtful. I've never seen a honda with a tranny cooler, nor have I heard of a honda melting bearings or gears together...

 

Partially true. You should never tow a car with its drive wheels on the ground.


Which is why AWD cars must be flatbedded.


Coasting, however... is fine.

 

The one thing I heard from somewhere before is something about the water pump. When you are coasting, it slows down alot, and cant cool as much. Im not sure... something like that. I would like to know the answer though.

 

It would only slow down because your RPM's have dropped, slowing the speed of the pump...cant really see this causing a problem though