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How to deal with a rounded tranny fill bolt...

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Old 02-11-2010, 06:03 PM
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How to deal with a rounded tranny fill bolt...

SHould've expected it. I was about to change the oil for the tranny today, but I can't undo the fill bolt at all. I PB blasted the hell out of it, used a hammer to tap it slightly and it ain't budging at all.

Anyone have any suggestions/ideas for this? Luckily I didn't undo the drain plug first, but do they sell replacement fill/drain plugs at the auto parts stores or is it a dealer only item?
Old 02-11-2010, 06:07 PM
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junkyard! Probably get it for free if you throw it in your pocket. Not saying i condone that kind of behavior but to each his own. plus while your there you can find other crap you need. If you like me a trip to the local yard has yielded many good finds even when i'm not looking for anything. Otherwise yeah probably the dealer.
Old 02-11-2010, 06:07 PM
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#1 Try a pipe wrench.

#2 Weld a nut to it.

#1 failed for my rear diff, but #2 worked like a charm. From the heat of the weld, it was finger tight afterward.

I bought mine at a local parts store.

Last edited by jason191918; 02-11-2010 at 06:08 PM.
Old 02-11-2010, 06:15 PM
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vice grips + Hammer???

If its already rounded off then you dont really have to worry about making it worse!
Old 02-11-2010, 06:17 PM
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I have had succuess using a punch or chisel on the edge and tapping it with a hammer if you are having trouble looseing it.

Jamie
Old 02-11-2010, 06:23 PM
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Extractor sockets?
Old 02-11-2010, 06:31 PM
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You can always take the shifter out and fill it through the shifter hole as well with a funnel. That's what I did when I found out my fill plug was stripped.
Old 02-11-2010, 06:36 PM
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Originally Posted by 89silverpu
You can always take the shifter out and fill it through the shifter hole as well with a funnel. That's what I did when I found out my fill plug was stripped.

Oh. I just might end up doing that. I gave up for the night, has anyone had any success with the extractor bolts? I can pick up a set at sears for 20 bucks.
Old 02-11-2010, 06:36 PM
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Heat+Vicegrips.

Failing that weld on a nut and be done with it.
Old 02-11-2010, 06:38 PM
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a nut is a couple of bucks and a 6 pack is cheap. have a buddy weld a nut on
Old 02-11-2010, 06:44 PM
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i always grab atleast a couple drain plugs if there is nobody lookin lol

and the thought (i'm NOT going to do this...it's just a straight up bad idea..LOL) has crossed my mind before on going into the yard after dark and getting a grille for my '86 that they want $75 for!!!!...like i said though..i don't steal...lol and i have asked the owner of the yard before if he minds me grabbin bolts and such and he don't care, but his employees flip over it lol
Old 02-11-2010, 06:52 PM
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I just changed my tranny and transfer case fluid a couple weeks ago. I used a Impact gun to remove the fill and drain plugs. Just make sure you hold the gun on there firmly.
Old 02-11-2010, 07:01 PM
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Originally Posted by Slowrunnin
I just changed my tranny and transfer case fluid a couple weeks ago. I used a Impact gun to remove the fill and drain plugs. Just make sure you hold the gun on there firmly.
He already rounded it off.
Old 02-11-2010, 07:30 PM
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Originally Posted by Toyomo
Oh. I just might end up doing that. I gave up for the night, has anyone had any success with the extractor bolts? I can pick up a set at sears for 20 bucks.
yep.. its what i use at the shop.
Old 02-11-2010, 08:46 PM
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that is why the allen head insert fill/drain plugs are the choice for replacement...
Old 02-11-2010, 09:00 PM
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Originally Posted by ocdropzone
that is why the allen head insert fill/drain plugs are the choice for replacement...
The aftermarket hex head one's are about 3 times as thick as the stockers, making them a lil bit harder to strip.
Old 02-11-2010, 09:18 PM
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Anti-seize and aluminum washer when you put it back in.

Steel bolt in aluminum casting = no bueno
Old 02-11-2010, 10:16 PM
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been there done that first off get a PROPER SOCKET i think its a 22 mm DONT FORK around with trying to find a standard thats close thats why this happened !!!
hammer and chisel it out tapping it out one tap at a time its soft alum now get a replacement from the boneyard or da dealer and lesson learned metric on metric
Old 02-11-2010, 10:44 PM
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Originally Posted by Toyomo
SHould've expected it. I was about to change the oil for the tranny today, but I can't undo the fill bolt at all. I PB blasted the hell out of it, used a hammer to tap it slightly and it ain't budging at all.

Anyone have any suggestions/ideas for this? Luckily I didn't undo the drain plug first, but do they sell replacement fill/drain plugs at the auto parts stores or is it a dealer only item?


Vise Grips and a hammer
Old 02-12-2010, 05:14 AM
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24mm

Apply heat with a torch for a few seconds and tap the bolt head tangent to the center with a chisel and hammer.


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