[E92William]

Well I screwed up using a 12 point against my common sense. Reason I did was because there's no space to fit my ratchet and a socket because of the transfer case and thought it would be fine. Turns out not. I'll be getting 6 point wrenches in the future.

As of now I hope I can use a punch to bang this thing off

[nsjames]

it's already buggered.

Put a flat jaw set of vice grips on it as hard as you can, smack them with a deadblow, it will pop.


edit:
make sure you put the vice grips on the right way.

[mecheng77]

Use a craftsman bolt out socket kit, it has spiral flutes and works every time. Then change the bolt

[gbalthrop]

Originally Posted by nsjames

I'm not understanding how you all are destroying fill/drain plugs. ["Me Neither" ] Don't use a twelve point. [OR Pliers, or SAE wrench] Smack it with a hammer instead of trying to muscle it off.

LIGHT Impact is ALWAYS better than "Three Grunts Dead Pull" when trying to loosen a stuck fastener that has been through thousands of heat cycles over 10+ years time. Just put a 17mm box end (preferably 6-point) on it and TAP (I would NOT say "Smack") it. I have found that light tapping on the free end of a spanner works best, using a hand sledge (high mass, low velocity = medium impact/ momentum (MV) and best control. If the wrench is NOT a snug fit on the filler plug/ bolt head, then instead of getting impact on the threads, you get rounding off of the plug head.

Also, if your GM6 pan gasket is leaking, you can "snug-up" the 17 pan bolts. The bolts are Steel; the Trans Case is NOT magnesium; NO TTY bolts. Tighten opposing diagonal bolts, similar to "Star Pattern" recommended for wheel bolts. Gaskets compress over time, and snugging up after 10+ years can still work if Bolts are NOT TTY (Torque-to-Yield).

George

[jimdiemar@gmail.com]

Yes. That is what I did @ 163,000 now my tranny is a mess. Best to drain fluid save it change filter pan use a very fine paint filter to strain old fluid and reinstall the old fluid Please talk to a trans shop who does a lot of zf6hp19 trans repairs. Before you do anything.