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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