Ok I've been searching and cannot find an answer. I have a 93 Mustang with a Tremec 3550 and 4.10's. I bought the "Temporary" Chrysler speedo gear from D and D transmissions and it ate it right up. I called them and they told me they no longer make the gear to change in the trans. So is there a fix, or something? I have heard of sppedo gear adapter. Is there a certain one for this combination? Thanks