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PostPosted: Thu Apr 21, 2016 2:15 pm 
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Location: Long Island, N.Y.
JUST put in the required 2qts. of Red Line MT-90 GL-4. Magnetic drain plug is in place. The MAJOR issue I had with this 15 minute gear oil change was,and still is, a frozen fill plug. After 2 hours we gave up. Nissan installed this plug with some type of thread compound and it is now seized to the aluminum housing. Didn't want to crack housing so I filled it through the temperature sensor hole and then put the sensor back in. DONE.

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1985 300ZX- GLL Dark Pewter Metallic - Survivor


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PostPosted: Thu Apr 21, 2016 2:41 pm 
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Location: CT
8) You might be too smart to belong to this Club...... 8)

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PostPosted: Thu Apr 21, 2016 4:00 pm 
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Ha! More than one way to skin Z ...... :thumbs_up:

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PostPosted: Thu Apr 21, 2016 11:45 pm 
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Another option is to remove the shifter up top and do it from there. Whatever works. :thumbs_up:


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PostPosted: Fri Apr 22, 2016 8:19 am 
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That seems to be a lot of extra work to disassemble the center console, but it's still another good way to fill the tranny. :thumbs_up:

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PostPosted: Fri Apr 22, 2016 8:39 am 
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Location: CT
In an all-steel application (plug and case) I suspect you could pass a small propane torch over the plug and tap/vibrate it loose slowly. With a steel plug in an aluminum case, I'm not real sure that's a good idea. If the plug expanded faster than the case, you might cause even more problems.
In a previous life I've had to drill two small holes in a plug (not exactly this same application) and make a corresponding two-pronged spanner wrench (a "special tool" in Austin Healey parlance) with a long handle in order to torque the plug out. My buddy leaned into the screwdriver slot and I leaned into the spanner. It turned right out.
I replaced the plug once I had it out because it now had two little holes drilled into it, but that was more of a mental thing than a mechanical necessity. It just bothered me that a plug had holes drilled in it. I think it cost me $4 to find another one at a junkyard.

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PostPosted: Fri Apr 22, 2016 10:15 am 
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Location: Long Island, N.Y.
I was able to get a 3/4" drive short extension onto the square plug head and then get a 2 foot wrench on it. I must have applied about 100 Ft.lbs. to that wrench ( in both directions ) and it didn't budge. So I stopped before cracking the case.

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1985 300ZX- GLL Dark Pewter Metallic - Survivor


Last edited by HowardJ on Fri Apr 22, 2016 6:01 pm, edited 1 time in total.

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PostPosted: Fri Apr 22, 2016 10:59 am 
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The biggest issue I see about not being able to get the fill plug out is to check the fill level. The FSM suggest you poke your finger in there, haha.


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PostPosted: Fri Apr 22, 2016 11:20 am 
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"Never start engine while checking oil level"

HAHA! :lol:

Duhhhh......

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PostPosted: Fri Apr 22, 2016 6:27 pm 
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The "sending" unit that I removed, according to the FSM schematic, was actually the Reverse switch. The distance from the floor up to the frozen plug on the drivers side and the one I removed on the passenger side was almost identical. And I made sure to put in the exact amount specified(4pts./2qts.) and the gear oil was just starting to creep out of the hole. All should be good now. :shock: :thumbs_up:

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PostPosted: Fri Apr 22, 2016 6:35 pm 
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Location: Long Island, N.Y.
Frank T wrote:
"Never start engine while checking oil level"

HAHA! :lol:

Duhhhh......


I would think it would be more important, when checking the oil level, that the car shouldn't be moving.:lol: Unless you have a souped up creeper. :thumbs_up:

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