GENE; Time to open up and that drop of oil. I just ran the reset on four of the several speedos I have, all worked as 1932.V8. said, one way one mile at a time the other way, all back 7777,8888,9999, and 0000 and pull out. ... Once you get it out of the dash, soft pad on your work bench ( its a sitdown job, and a bit of fun too ) un-crimp the stainless face ring, two of the three or four crimps, and lift the ring off. now remove two of the screws from the back of the main can, and the works will come out. I would use a small vacuum cleaner to pull the dirt,dust and wornout oil and grease, someone may have put in at some time or other ?? Be very gentle with the vacuum, don't use a strong blast of air. Your wifes hair dryer works good to, again be gentle blow from a distance. AS; for the oiling I have seen and been told both ways,, soak it dripping wet and or small drops of light weight oil. I like the small drops where I think needed, and some light greese,vasoline (spl?) on the gears, see inside. on some units there is welch plug,with felt wick to be oiled, on the very back of the unit at the cable input, attchment end. You may want to do your cleaning in resevers, ie get it warm first then vacuum and then oil, and heat again ? ? ..As for the oil, I go the a good gun shop, and get what you might use on youn 357 mag, or fishing reel, also thay will have a can of blow dry air. ( if she said no on her hair dryer out in your old shop ) Sorry this is so long, its a fun thing to do. ... just a note; of the 37-39 speedos I have, I have found three different manfacture, Stewart Warner, Walton and unkown ( not marked ) inside or out....OLD....BILL