My experience & forum observations have been that the 722.3 - 5 (nonelectronic) trans. are not very reliable, and are prone for failure once the reverse gear starts acting up. Replacing w/ a used trans. will just invariably end up w/ a failed trans. Rebuilding seems to be the only way to avoid buying a used headache, and getting peace of mind. Finding a good/competent trans. mechanic is the trick. Just my thoughts . . .