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Nice video. Doing a TH475 right now. You're correct, gloves are not for sissies. Professional Toyota Technician here, I wear several sets of latex everyday. Oh, and, powdercoating is awesome. I have some cerakote left over from another project...hmmmmm.
Honestly, it's the coolers job to cool the fluid. If you are that concerned, get a bigger cooler. Having said that, the only conceivable issue to Me would be the heat treating of the aluminum alloy. Most aluminum high strength alloys are what's known as; "precipitation hardening." They take the part as cast and soak it at specific temperatures for specific times to achieve specific properties. The reason I mention it: Back in "The Eighties" there were three men who as dive buddies wanted their new aluminum tanks to match. They had them powder coated. The first ruptured while filling, killing both the guy and the shop owner. The DOT tracked down the remaining two and no one else died. Again, having said that, a 4L80 case is not a pressure vessel designed to contain 3000psi. There is no way I could imagine it making a difference at all. Not that big a fan of spending money to pretty up something you can only see on your back though. Maybe why I'm divorced.
I do not like powdercoating on aluminum - I've seen too many failures in a marine environment. The least bit of oxide always creeps and grows, the coating holds in moistue once there, and soon... it flakes off big time. I'd rather throw high temp primer and enamel right after an acid wash [like alumaprep]. That is a pain of course because the case must be fully stripped, bushings and all. A coat of alodine to seal it is tempting, but... I don't know if it gets along with transmission heat that well over time except it gets a good paint job over it. Work fast, and in a dry [sub 40% humidity] environment. I tested an intake manifold pre-treated with alodine last year - so far so good: coated on top with a high temp primer and a ceramic enamel. The surface before priming is excellent: truly squeaky clean.
Do you replace the two rings that you removed and threw away. Just want to make sure that I fully understand your modification. I believe that the only stupid question is the one not asked. Great video. Definitely going to keep watching your videos. Many thanks
powder coating is a personal preference if you like the way it looks of your vehicle have at it anyone else tries to tell you that it's going to be hard on parts and it's not going to do this it's going to help cause heating problems will guess what putting your foot three quarters of the way into the carburetor helps with heating problems well the radiators too small because my foot's stuck too far in the 1450 dominator believe me powder coating makes things look nicer heat is a product of using your toys if you spent all your money on the paint job and all well the motor transmission works I forgot to put a big enough radiator in there transmission cooler engine oil cooler I mean come on guys it looks nice powder coated
I interested on the rollerised project...I'm doing it and putting the sonnax case bushing install backwards is too deep in transmission. I read that it the perfect deep to hold shim and bearing , but it not.. Whit the OEM thickness mesurement shimmed bearing...bushing contact the output shaft ....i have use tci 224400 kit...i will probably knock out just a bit the bushing or sand it...
