Transmission fill plug

Tiny
ANTHONY426
  • MEMBER
  • 2006 CADILLAC CTS
  • 3.6L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 127,000 MILES
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?
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Monday, May 1st, 2017 AT 4:31 PM

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Tiny
KEN
  • ADMIN
Hmm, good question, can you upload a picture of it so I can see it please?

Best, Ken
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Thursday, May 4th, 2017 AT 10:07 AM
Tiny
STEVE W.
  • EXPERT
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.
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Friday, May 5th, 2017 AT 12:40 AM

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