99 silverado 1500 5-speed manual transmission.
4.3 liter engine. 200,000 miles. Transmission lost
all the oil out the rear seal at 195,000 miles.
Transmission rebuilt by reputable shop. Still leaks
out rear seal. I replaced rear seal again. U joints
and clutch was replaced just before leak started.
Replaced u-joints again suspecting vibration on
drive shaft. Still leaks 1/2 quart every 400 miles.