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Got some good help about the serious leak that showed up after several months of setting, but it turns out that the fluid is boiling up out of the filler/dipstick tube. suspect clogged pump. checked cooler system--good delivery through and return. shows one quart low on last attempt and i heard pressure hissing in the tube. pulled up on dipstick and significant pressurized air came out. have another tranny, but id label says CM instead of CJ. will they interchange? they look the same, but my engine looks like a 350 and the other looks bigger. am hoping i don't have to swap trannies. what is happening. was running fine until I parked it last fall.
There is a vent to deal with expansion/contraction of the air in the tranny. On a TH it is way up on top of the bellhousing. Look and see if you have a mouse nest, etc obstructing it. Stop by a tranny shop and eyeball a TH or a diagram to ascertain it's exact location because I think you are going to have to locate it by feel.