As I recall the reason to not tow a manual trans vehicle with the
driveshaft in place is that the angle of the vehicle may cause the trans
fluid to move away from the bearings at the front of the trans, especially
if the trans is low on fluid.
I have a friend that owned a wrecker service that had to buy a corvette a
new engine when the trans was in neutral at the beginning of a tow that
went into gear when the driver hit a rather large bump, causing something
in the car to push the trans into gear. The driver didn't notice the additional
drag caused by turning the engine. 30 miles doen the road it was shot.
....... At least that is what I was told!
Peace,
Pat
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Pat Horne, Network Manager, Shop Supervisor, Future planner
CS Dept, University of Texas, Austin, Tx. 78712 USA
voice (512)471-9730, fax (512)471-8885, horne@cs.utexas.edu
On Wed, 27 Feb 2002, lou daly wrote:
> thanks Brian
> never thought of that
> towed each of my cars 500+ miles with the d/s in place
> i know one still works and i hope the other... live
> and learn :-(
> lou
>
> --- Brian Hollands <bholland@hayes.ds.adp.com> wrote:
> > The issue with towing centers around the way the
> > transmission lubricates
> > itself. If you're towing with the drive shaft
> > attached, car in neutral,
> > what happens is that the drive shaft spins the
> > transmissions main shaft, but
> > nothing else. That's the key. All of the gear oil
> > is in the bottom of the
> > trans and stays there unless the counter shaft is
> > spinning. The counter
> > gears pick the oil up and puts it on the main shaft
> > gears. From there it
> > goes through the holes in the main shaft gears to
> > lube the rollers and
> > bushings. If you spin the main shaft only, as in
> > towing with the drive
> > shaft attached, you run the risk of burning up the
> > roller/needle bearings
> > under the main shaft gears as well as the big roller
> > bearings too.
> > When the engine is running, the car is in neutral,
> > and the clutch is engaged
> > such as idling at a stop light, the input shaft
> > spins (attached to the
> > clutch disc) and as a result the countershaft spins
> > too which continues to
> > lubricate everything. When you're driving (in gear)
> > you get the same
> > situation except that the main shaft is spinning
> > too.
> > Bottom line, if the main shaft is spinning you want
> > the countershaft
> > spinning too.
> >
> > Brian '69 2000
> > Tampa, FL
> > http://web.tampabay.rr.com/oilleak/
> >
> >
> > -----Original Message-----
> >
> > the rule is yes
> > but i don't see why
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