NEED HELP...!! quick.....
Reply #6 –
Actually, (as Chooglin said) it's a plug to keep debris out of the tranny until the dipstick tube is installed at the factory. Shove the tube in, the plug falls into the pan where it lives happily ever after. Even if the fluid & filter were changed in the past, the Jiffy-lube "mechanic" probably put it back in the pan so he wouldn't have any "left-over parts" on his cart that he couldn't identify.