Re: This rusty gear usable?
[Re: mopar dave]
#2658351
05/23/19 11:22 AM
05/23/19 11:22 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Cab, have you ever seen a gear come out of a rear housing rusted like that. I'm skeptical I did not get my gear back from the shop that preformed the work. The old switcharoo. It is a Strange/US gear and is not labeled any where. I've seen that many times. Transmission gears too. Especially when they sit and you have weird weather changes. Some oils don't actually stay on the gears as well as others and when they sweat, the oil works off the gears and then the rust sets in. Sitting in a box on the shelf and that will happen too.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: This rusty gear usable?
[Re: madscientist]
#2658369
05/23/19 12:17 PM
05/23/19 12:17 PM
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Joined: Sep 2003
Posts: 19,591 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,591
north of coder
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just went through a rear for a 58 chevy that was like that. the car had a 3:55 in it and my buddy wanted to use a 3:36 that he had rebuilt because the 3:55 was leaking at the pinion seal and was a tad noisy. the 3:36 had several gears that had some slight pitting, and he was worried they might "sing". put that rear in, works great, no noise, and decreased highway RPM as a bonus. this car is a cruiser and will not be raced, but his rear [pun intended ] will last for a long time.
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Re: This rusty gear usable?
[Re: moparx]
#2658376
05/23/19 12:32 PM
05/23/19 12:32 PM
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Joined: Jul 2008
Posts: 30,474 Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,474
Florida STAYcation
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Rust pits storing oil ? ....couldn’t have said it bester!! I picked up a 8 3/4 pig some years ago .... a bit rusty on the ring gear ...., cleaned it up with some 600 and it was good to go !
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Re: This rusty gear usable?
[Re: mopar dave]
#2658433
05/23/19 03:07 PM
05/23/19 03:07 PM
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Joined: Dec 2005
Posts: 11,692 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,692
Fulton County, PA
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It is a Strange/US gear and is not labeled any where. A USGear, Richmond or any other decent aftermarket gear will have marks on it identifying who made it and/or the part number. The only gear I've ever seen without it was some cheapo Chinese junk. Unless it sat for a loooong time, it shouldn't have been rusted. Did you drive it to the shop?
If the results don't match the theory, change the theory.
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Re: This rusty gear usable?
[Re: mopar dave]
#2658558
05/23/19 09:12 PM
05/23/19 09:12 PM
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Joined: Dec 2005
Posts: 11,692 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,692
Fulton County, PA
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This is a GM 7.5 part#75-529 gear set, 37 & 7 teeth on the ring and pinion gears, Made In USA, and the little street sign with a "G" symbol is US Gear. If the ring gear didn't have that type of marks, and you were sure of what was in it, I'd go to see the fellows and make them aware of their mistake. But that's me.
If the results don't match the theory, change the theory.
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Re: This rusty gear usable?
[Re: mopar dave]
#2658597
05/23/19 10:42 PM
05/23/19 10:42 PM
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Joined: Oct 2007
Posts: 4,210 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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Those pits are deeper than the heat treatment. Every time that tooth is loaded hard, a tiny piece flakes off the edge of the pit. That tooth will fail across the pits earlier than a virgin tooth. Will it happen later today, or 20 years? Who knows.
Boffin Emeritus
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