Re: Typographical error or intent?

Posted by HH56 On 2023/7/30 14:42:56

It does seem a bit odd to have a minimum speed as the usual caution when towing a car with an automatic is not to exceed a certain speed or distance. Maximum is 30 mph or 300 miles in Packards case

Packard Ultramatics and several other early automatics do have a rear pump driven by the wheels but capacity is usually much less than the front pump. If it was not a typo, perhaps the mfg who issued the minimum speed caution also has lubrication concerns. It could have a rear pump that needs to be at a certain speed to provide adequate pressure lubrication to whatever parts are turning or if no rear pump, perhaps there is some sort of fall back action set up by a rotating part maybe like a splash lube where slow turning would not be sufficient.