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Originally Posted by RageCage
Just passed inspection for another year !!!
I have an 85 Classic 4 door, which has been a daily driver all these years in the northeast.
The good news is that my trans fluid leaks onto the drive shaft, and works its way back, and the spinning shaft sprays the trans fluid out onto a swath about 1.5 feet on either side of the shaft, which is rust-free, all the way back to the differential.
Looking for any new ideas, or just plain confirmation that I'm doing the right thing for the rust.
Thanks
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The leaks of oil and trans fluid is part of the GM design to control the rust...these vehices came with no undercoating because the leaks are the rust proofing..
I have over the years since 1967 only have purchased 4 gm vehicles for my personal use...as a result of this extended time and living in the rust belt worse than jersey I have had good success and have almost perfected my rust control...
with your vehicle ...the interior seats must be removed...any rust holes must be repaired....since this is your winter vehicle don't need to be fancy...with galvanized metal and tin snips and a high quality roof sealant and rivets cover the holes...from the inside...this is very important I have seen vehicles go up in flames because of holes in the flooring....under the vehicle use the sealant or a brush on rust proofing to seal from salt and chemicals...
your gas tank must be dropped find the holes and use marine tex epoxy with a fiberglass cloth and cover the rust hole....after 24 hours clean and coat the tank with the brush on undercoating...
this will take care of your problems for a couple of years if you do it thoughly....the one area of concern that may not be repairable with ease is the support frames for the rear end and the body/frame mounting ...especially behind the rear wheels...body starts to move too much over the frame...
since the tank has rust in it install a large gas filter in addition to the one in the carb..
good luck...