Quote:
Originally Posted by 81-300d
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Do you have an idea of why the pump would go out, something inside binding (brake band)??? The pump seems like one of the simplest parts in the transmisson and mine failed while idling. I think it was on your thread that pointed out that the torque converter tabs were the weak part.
And lets say  I might have towed my car 30miles at 50mph thinking the pump wasn't the problem. Do you know what damage I could have done? |
The front pumps + torque converter tabs on these transmissions are known for it. Known for being weak. The next real series of transmissions the 722.3 had a totally redesigned front end...
The problem with towing these transmission from what I can make out is related to the secondary pump. This one drives from the output shaft and is turned by the rear wheels. Apparently you are meant to be OK so long as you stay below 30 MPH and go no further than 50 miles
http://www.peachparts.com/shopforum/diesel-discussion/224996-i-need-tow-dolly-my-300d-40-miles.html
I'm not 100% sure why you shouldn't go faster than 30 MPH - I'll look into it.
(It is probably going to be something to do with the secondary pump producing too much pressure and if the engine isn't running it is trying to turn the engine backwards via the torque converter)