bill, you really got me here. bev? but i got it figured out. a few fingertips away.
and as to internet etiquette: dont post if too lazy to move fingers. (imho). over and out.
edit: oh, no, not out, i seee i got 3 likes, ill be feeding on them and come back.
steve, unfortunately not. not on the c5. its about 17mm, some fine thread. (dont forget, other cars have drain plugs, so that might be it.)
→https://www.practicalmachinist.com/forum/threads/4l60e-plug.419563/#post-4153125
(sometimes i dont understand the moderators. the c5 is one of the most...
are you entering some youtube competition? if a beginner, you will quickly find out that removing as little as possible is the goal. metal is expensive.
if you are really serious, take the machine off the (probably?) sheetmetal stand and make a base out of epoxy-granite for it. slap on a 25mm...
if its indeed a 50-taper and you want an off.the shelf solution, get a mt4 3-jaw + cat50 to mt4 adapter with the shortes projection you can find. (maybe you even find a combination with no projection at all?)
there are cat50 facemill adapters with 4 holes also, if you want to make a backplate..
really? used to be so many car guys on here.
the c5 has the trans in the back and no dipstick. there is a fill/check level hole in the pan. the plug is around 17mm od and 15 tpi.
edit: would it be metric or some straight pipe thread?
would anybody know what thread the 4l60e plug has on a 99 c5?
(my measurements dont really correspond to anything i know. i had it out, but was in a hurry and the light was bad, maybe i made a mistake.)
so in that case you only need one, no?
i suspect the spring is rather for getting rid of vibrations. although on cnc grinders they apparenly do crazy stuff, like calculating the grinding path taking account of the spring force.
(rereading your post, maybe i misunderstand what spring you are...
so instead of moving the workpiece you move the chuck? why not put the whole lathe on the mill? imho a useless aproach. if you have a decent 3-jaw on the lathe and rotaty, no need for that. and if your lathe chuck is decent, you will avoid dismounting it, because you loose precision. e.g. you...
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