truck in question: 1971 K20 350 V8 TH350 trans ok the needle in the haystack search continues, the rear seal on my T-case is leaking and i need a new seal but the auto parts stores books cant ID my t-case i thought it was a NP203 but after looking more closely the only numbers on it are C-88404, i have not been able to cross refrence this number with anything. if anyone has any info that would help me ID it id appreciate it and i can post pics if needed. my swap question is: a friend of mine just parted out a 3/4 2WD ton burb with a 700R tranny and will sell me the tranny for $50 i currently have a TH350 tranny with the unknown T-case what would i need to intall the 700R inplace of the TH350 and can i use any of my exsisting parts and if not what would i need. oh and one more thing, im leaking fluid out of the spedo cable whare it hooks to the T-case its a new cable is there anything i can do to stop the leak? i tried a large amount of RTV in the connector it only seemed to delay the leak about 2 days. thanks for any help these forums are the best around!