Transmission fill plug

2006 CADILLAC CTS
127,000 MILES • 3.6L • 6 CYL • RWD • AUTOMATIC
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ANTHONY426
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The fill plug is stripped where the torks forty five goes. I am curious if it is cast iron or metal will I be able to weld a bolt to it to freeze so I can put fluid in my transmission?
May 1, 2017 at 4:31 PM
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STEVE W.
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I hope you have a lift or tall jack stands. To check/fill that trans you need to have it jacked up level with the engine running in neutral. Then you remove the fill plug and add fluid until it starts to drip out.

From the book -

Start the engine and allow the engine to idle until the transmission fluid normal operating temperature has been reached.
Depress the brake pedal and move the shift lever through the gear ranges, pausing a few seconds in each range. Return the shift lever to the PARK range.
Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the PARK range.
CAUTION: The engine must be running when the transmission fluid fill plug is removed, or excessive fluid loss will occur. Transmission fluid may be hot. Since the actual fluid level is unknown, stand clear when removing the fill plug. Have a container ready to capture any lost fluid. Do not turn the engine off with the fill plug removed, as you can be injured by hot transmission fluid being expelled out of the oil fill opening.

Remove the transmission plug (36).
IMPORTANT: The transmission fluid may darken with normal use and does not always indicate contamination or oxidation.

Check the fluid level. The fluid level should be even with the bottom of the threaded plug hole.
Add DEXRON III automatic transmission fluid in increments of 0.5 liters until the fluid drains from the plug hole.

As for the plug itself, they are steel and screwed into aluminum. They corrode in plus have loctite from the factory because those are supposed to be a "sealed for life" transmission.
May 5, 2017 at 12:40 AM
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DAMON CISNEROS
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Before you go welding anything to your vehicle I suggest grind two three notches into the bolt and using a chisel or strong screwdriver pound in each notch one at a time until you break it loose then you can unscrew it with the T-45 even If it's stripped.
Jan 4, 2020 at 12:17 AM
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STRAILER
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Excellent addition to this thread! Please feel free to use 2CarPros anytime!
Jan 5, 2020 at 12:17 PM
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JASON HUNTER
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I’ve dropped the pan and need to back out the refill plug but it’s stripped. I’ve tried to heat it up to back it out. I was wondering what to do next?
Mar 31, 2021 at 9:44 AM (Merged)
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SCGRANTURISMO
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Hello,

I wouldn't recommend heating up the drain plug to get it come out, it's only defeating the purpose. What does metal do when it gets hot, it expands, making it harder to come out. Have you tried to see if you can get an easy out on it and get it out that way? If not, you can take a dremmel tool and grinding wheel and grind each side of the head so you can get a wrench on it and get it out that way. Please get back to us with how everything turns out.

Thanks,
Alex
2CarPros
Mar 31, 2021 at 9:44 AM (Merged)
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JASON HUNTER
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I actually used part of your answer and thank you.I was able to get it out easily using a saws all in attempt of squaring off the off 2 sides of the head and it just came out from there with no damage to any other parts.. love you guys and please get back on my reply if I really messed things up.
Mar 31, 2021 at 9:44 AM (Merged)