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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | All the PTO drives on the cluster gears I've seen had straight cut gears. Trying to mesh a set of helical gears to engage a PTO would be difficult, if it could be done at all. That's one reason a transmission is noisy when the PTO is engaged. On the big rigs I've worked on, sometimes there's an adapter with an idler gear between the main box opening and the PTO, especially on one that can turn both directions to run a winch, etc.
Jerry
Edit: I just found a crash box PTO on Ebay from a 1937 4 speed. It looks somewhat different that tne one for a 420, so I bought it.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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