Any one know why this 14 bolt has paint on the interior of the differential?
Anyone done this?
Know anyone who has?
What’s the benefit?
Anyone done this?
Know anyone who has?
What’s the benefit?
Painting inside the differential
- Thread starter MallCrawlOnTons
- Start date
Guys used to do head an lifter valleys to promote oil flow back to the oil pan. I suppose it couldn't hurt in a differential.
Yea I’ve seen a couple images of engine valleys painted. Researching 14 bolts, Ive come across a couple that have been painted on the interior and jsut thought some guys would have some input.
Maybe the paint in the photo is just a fashion statement?
Wondering why the inside of the pictured differential is painted calls for speculation of what is in some unknown person's mind. There could be many reasons. One would have to ask the owner of the differential.
I don't know anyone who has painted the inside of a jeep differential.
Wondering why the inside of the pictured differential is painted calls for speculation of what is in some unknown person's mind. There could be many reasons. One would have to ask the owner of the differential.
I don't know anyone who has painted the inside of a jeep differential.
There is no benefit to painting the inside of the diff housing... none whatsoever.
Can you imagine the sudden realization and disappointment as the cover went on?
:roflmao:
Loving the replies.
Everyone seems to have an opinion and assumption on the subject. But nobody can name the coating/paint or point you in the right direction to find more info on it...
Ive heard old automotive engineers talk about Glyptal resins and paints in rear ends and engine internals. Its used to promote oil circulation and knock down rough castings in the diff. It’s still used inside hydraulic chambers today. Does it have a benefit in newer differentials? Probably not. Is it worth it? One could easily argue, no. Gale Banks talks about is somewhere, just cand find it.
https://www.hisco.com/Catalog/Paints-Coatings/Paints-Primers/Enamel-Paints/1201G-21717
Ford drivetrain and axle engineers used it in 9 inch rear axle applications like it was going out of fashion back when they were still manufactured. :eaea:
Metal technology has come a long way since the early Ford 9 days. Apparently it was to used to fight the inconsistency in metal’s porosity back in the day. Hard to find actual back and white data on that though.
But know that its not just some dumb hillbilly painting the inside of his 14bolt to look cool. It originally was the solution to an engineer’s design requirements as most of my run ins with it have been factory applications.
Loving the replies.
Everyone seems to have an opinion and assumption on the subject. But nobody can name the coating/paint or point you in the right direction to find more info on it...
Ive heard old automotive engineers talk about Glyptal resins and paints in rear ends and engine internals. Its used to promote oil circulation and knock down rough castings in the diff. It’s still used inside hydraulic chambers today. Does it have a benefit in newer differentials? Probably not. Is it worth it? One could easily argue, no. Gale Banks talks about is somewhere, just cand find it.
https://www.hisco.com/Catalog/Paints-Coatings/Paints-Primers/Enamel-Paints/1201G-21717
Ford drivetrain and axle engineers used it in 9 inch rear axle applications like it was going out of fashion back when they were still manufactured. :eaea:
Metal technology has come a long way since the early Ford 9 days. Apparently it was to used to fight the inconsistency in metal’s porosity back in the day. Hard to find actual back and white data on that though.
But know that its not just some dumb hillbilly painting the inside of his 14bolt to look cool. It originally was the solution to an engineer’s design requirements as most of my run ins with it have been factory applications.
Glad you brought this up. Although not automotive related, virtually all the Caterpillar earthmoving equipment I’ve worked on, the transmission, axle and hydraulic tanks were painted on the inside. They did it for a reason. Was it to prevent corrosion while the part sat to be used or condensation, casting porosity, something else? I have no idea.
You are right, I have seen lots of rockwells and portal axles use it as well as all heavy equipment like Cat parts and internals. , it's possible those 14 bolts pictured above were pulled out of tow truck or some kind of truck that was built for heavy ind work.
From what I've heard and read, it helps promote oil circulation more efficiently.
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Old drag racers would paint the insides of the blocks and heads to promote oil returning to the oil pan, and subsequently, the oil pump, quicker. I have a friend who used to do this with every SBC race engine he built. Didn't realize it was done in differentials. Interesting...
It's like wearing fancy underwear when no one is going to see it. The only benefit is you know it's there.
TJ2
TJ Expert
Picture this: a red thong under pants so the fat lady feels sexy.
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