Downhill With A Dead Engine

No. Some eaton auto shifts have a internal pump, some do not. Same as manuals.

 

Right, but IIRC, the pumps are for pumping lube to the cooler and dropping oil on certain gearsets for better cooling under high torque loads, correct? A dead engine isn't going to be a high enough load for that to be a concern. It's not like an slush box with plain bearings that require pressure.

 

Disconnecting drivelines while towing has been a standard practice since the first road rangers came out. The lube gets moved by the input not the output. If it had a brownie it wouldnt be nessesary because with it in neutral the jack shaft between it and the main would not turn.

If the engine was dead like they say in the report and not turning then most likely the input shaft on the trans was not turning fast enough to lube it for the speed it was going. With the rear turning at that high rate of speed it would be a miracle if the trans isn’t cooked.

 

Not all trans with a cooler had a pump. If it had a pump it will pump while towed. Don't recommend long distance. But can be done safely. Input shaft normally needs to spin for oiling. But newer eatons have the "halo" oiling ring.

If you don't know, and must tow with shaft in on a manual. You want a running engine. If you don't know 100%, you pull shaft. Or both right side axles.

I'm not versed in the DT12. But a I-shift, I-Mack wants driveshaft removed, or all 4 axles removed, if you can't tow from the rear.

 

On Eatons the engine turns the input gear, which drives the countershafts. If the engine's off and the transmission is in neutral only the mainshaft turns but not the countershafts.

 

I was making the assumption he was smart enough to leave it in gear, but we all know what happens when one assumes!