Thread: GMC TH350 issues

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id put a little bead of silicone around the pan for good measure to, and also if the pan has been on and off a few times the pan will spider web ( crack) around the bolt holes and oil will leak out from the head of the bolts. run into that a lot over the yrs. what part of the trans is leaking? if you have to drive it to make it leak that could be a front seal. if it leaks sitting still it should be dripping on the floor some where close to where the leak is on the trans. if the shift linkage is the leak i don't think it would drip off of the right side of the trans where the dip stick is. can you get us a little closer? there is a seal on the shift lever.