Re: O/T Ford truck ZF 5 speed transmission

Posted by Jon Hagen on January 28, 2007 at 13:45:59 from (69.26.30.83):

In Reply to: Re: O/T Ford truck ZF 5 speed transmission posted by Bob on January 28, 2007 at 10:53:29:

Take Bob's advice, Dont even think about replacing that thin atf with 80-90 wt gear oil.

Years ago when I was running a dirt track stock car, I got a Chrysler 4 spd trans to use. I removed the cover to inspect the trans and dumped out the original atf that Chrysler used in those transmissions. I thought that for severe use like racing, I should put 80-90 gear oil in there to improve things. well, that transmission lasted less than 5 laps when a gear seized on the main shaft from lack of lubrication. That thick oil could not flow into the gear lube channels made for thin atf. The next weekend, I was a few hundred $ poorer and much wiser about chrysler manual transmissions. A new main shaft, second gear and atf back in the trans that gave no more trouble for the rest of the season.

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