John 65

Doing some work on a friends car, have the 4 speed out, have been soaking the plug but it just wont budge, thought it was tunring only to find out it was being eaten up by the wrench. Going to file it down a little to square it back up again. Any suggestions. It has been sounding a little loud latley and would like to check the fluid level. Never heard it until the side exhaust got changed to mufflers. Thanks

67L36Driver

Sears sells a set of 'buggered' bolt remover/sockets that may be worth a try.

wmf62

if a 12 point socket, or an 8 point won't fit anymore, get a pipe wrench. if a pipe wrench won't get it out, you're in BIG trouble...
Bill

mikem350

Hard to believe a Crescent adj wrench can't budge it....try some heat

MidShark

Try getting a 1/2" drive socket that fits over it and use an air impact wrench.

K2

Try warming up the case and put some dry ice on the plug. They do get very difficult to remove sometimes. Always use antisieze compound or teflon tape when installing cast iron plugs in aluminum cases.

LouieM

You may be beyond the penetrating oil stage, but:
The April/May 2007 edition of Machinist's Workshop did a test of penetrating oils where they measured the force required to loosen rusty test devices. Buy the issue if you want to see how they did the test. The results reported were interesting. The lower the number of pounds the better. Mighty interesting results for simple acetone and tranny fluid!

Penetrating oil .. Average load .. Price per fluid ounce
None ................. 516 pounds ..
WD-40 .............. 238 pounds .. $0.25
PB Blaster ......... 214 pounds .. $0.35
Liquid Wrench ... 127 pounds .. $0.21
Kano Kroil ......... 106 pounds .. $0.75
ATF-Acetone mix.. 53 pounds .. $0.10

The ATF-Acetone mix was a 50/50 mix (1 to 1 ratio).

Plasticman

Louie,

That is interesting and similar to my comparison to old Liquid Wrench vs. the newer (and highly touted) PB Blaster. Liquid Wrench comes out ahead every time! I have used the Kano Kroil, but it was too expensive for not much difference from my old standby Liquid Wrench.

But that ATF/Acetone mix sounds like a true winner!
Have to mix me up a batch.

Now was that Type A, Type F, Type FA, or Dexron, etc. ATF?

As for removing that Muncie plug, I agree to get the correct size 1/2" square socket, but would not use an impact (just apply strong steady pressure with a lot of leverage). An impact gun could impart more possible damage to the plug "square" before it breaks free.

Thanks,
Plasticman

TopLess62

Try tightening it slightly to loosen it. You should have a good surface in that direction for your socket or wrench and once you crack it loose, you can back it up. Just don't try "too" hard!!

65 DENCO

Same deal here, tried EVERYTHING. Blew my mind it would not come loose. had to drill it, clean up the threads and install new plug. Some of the simplest stuff is the hardest. Good luck

Workin On 59

Agree with K2. If you do not have dry ice, you can use a propane torch. Turn the gas on.....don't light it. Direct the nozzle (gas) to the plug to rapidly cool it. With the case heated that should help.

That ATF/acetone mix sounds like a good idea. .....and then if you can shock it with a hammer on an end wrench or pipe wrench it should move.

Good luck. Doug

LouieM

Plastic - I missed your, um, "penetrating" comparison, but sounds as if you got the right results. I don't recall where I ran across this oil advice, but I won't forget it.

I too would avoid an impact wrench and go for lots of leverage and slow, steady force. I'd heat the tranny case around the plug too, cooling the plug if possible just before trying to back it out.

Louie

jdk971

that is why i have a 3 foot one inch black pipe. put over the ratchet or wrench for leverage. slow pressure usually works.

62Jeff

I resemble that remark!