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Old 05-05-2017, 05:23 PM   #1
LugNut1990
 
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Question Manual transmission fill plug -- hints to loosen?

1990 KA24E 4x4 with the manual transmission. Been ~20 years since the last fluid change (but maybe only 30,000 miles).

The 17mm square fill plug won't budge with an open-end wrench. Short of going through the top/shifter, any hints at breaking the fill plug free? (Always do so before the drain plug!) The plug/trans body already look oily on the outside, but I'm spraying the fill plug now with LiquidWrench.
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Old 05-05-2017, 05:42 PM   #2
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You're better off to go through the shifter honestly, if you do 5 minutes worth of searching you'll find the nissan TSB that states the fill hole is too low in the manual trans and to overfill the transmission through the top by 1-1.5 quarts.
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Old 05-05-2017, 06:18 PM   #3
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+1 I filled through the shifter hole and overfilled by about a quart.
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Old 05-06-2017, 04:12 AM   #4
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weld an old pair of vice grips on that plug and knock the hell out of it, then replace it with the 1/2 drive plug like the rear end. its the same size plug.

craftsman made a set of auto locking pliers......i cant remember the name of those things to save my life. we used those several times in the garage. and a big breaker bar. you could try applying a propane torch to it for a few seconds at a time, then hit it with a hammer then see if it will budge.
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Old 05-06-2017, 04:12 AM   #5
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it was the craftsman clench wrench LOL

http://www.acehardware.com/product/i...9-8086fbc8d76f
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Old 05-06-2017, 02:20 PM   #6
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My 1998 KA24Eis 2WD and 5-speed; I use a 1/2-inch breaker bar on its fill plug, from underneath (217K miles).

If you cannot budge this, get an extension pipe for your wrench, because force times distance is torque. Wear safety glasses.
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Old 05-06-2017, 03:11 PM   #7
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Quote:
Originally Posted by Cusser View Post
I use a 1/2-inch breaker bar on its fill plug
Thanks. With what socket? I see a special one on-line, but it's $45. Went to a swap meet this morning, but didn't find any four or eight point sockets.

Weld on something ... I haven't rounded-off the plug (yet), fortunately! But that time/idea might come.
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mud and snow tires, HD trailer hitch (cat 3+),
liquid bed liner, G1W dashcam
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Old 05-06-2017, 09:09 PM   #8
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the clench wrench will grab it and break it loose if you get a long fence post on it for leverage.
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Old 05-06-2017, 09:34 PM   #9
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on mine the fill plug is a female 1/2 socket, so you just stick 1/2 inch breaker bar in there and crank it, no socket needed to put on the breaker bar.
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Old 05-06-2017, 10:54 PM   #10
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Wish mine was! My 1990's is OEM -- a male 17mm square head. All the other fill and drain plugs (differentials, transfer case, trans' drain) are female 1/2 inch.
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1990 Nissan Hardbody, Aztec Red
Standard cab, 4x4, KA24E, 5-speed
Intentionally near-stock
Mods: Second OEM horn, stereo/speakers/sub,
mud and snow tires, HD trailer hitch (cat 3+),
liquid bed liner, G1W dashcam
Definitely not for sale!
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