What is this plastic "plunger" thing in my trans pan?
I dropped the pan to change the trans filter in my 03 with 4R70W and there was a 1.5 inch "plunger-like" plastic piece laying in the pan. It has an o-ring on it. I don't know where it came from but I assume it has a purpose. Anybody know what it is or what I'm to do with it? Thanks in advance.
SOLVED! After further research it appears this is the dipstick plug that is inserted prior to assembly, when the dipstick tube is inserted the plug apparently gets pushed out and sits in the pan until next service. I guess it shows thiat I am performing the first service. FYI
Sounds like the plug used to fill the dipstick hole during assy. When they build the truck, and they shove the dipstick tube in place, it knocks the plug into the pan where it stays until the trans fluid and filter get changed. It's totally harmless, just throw it in the trash, or save it as a souvenier.
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My new to me 01 SCREW has 170000 miles and I wanted to change the fluid. Dropped the pan, lo and behold, there was the plunger! Drained the TC, blew out the tranny cooler lines and put her all back together and she shifts like a champ.
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