picked up a 3/8 with the slide pin selector,it slips tightening,,.can i get repair parts from sk or ?.,.,TIA

Call SK Customer Service, give them your model number and they'll send you a rebuild kit, for FREE!

Not if you are talking about a Frankenstein ratchet. I don't think they suppoet that one anymore. Have you taken it apart yet, it may be just dirty or a bad spring.

i now know about Frankenstein,gear is shot,i printed  postage and sending to sk,knowing most likely i will not get it back.,.,thanks