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[R. P. McMurphy]

24. If you know how to check the oil level . . .

then you are competent to check the transmission fluid level as well.

There is a dipstick for the transmission as well as one for the engine. Make sure the car is at operating temperature (when you get home and are parked in the garage is a good time) and the engine is running. With your foot on the brake and the rngine idling, shift into each of the gears until you feel the gear engage. I like to put the shifter into neutral in between gears just to make sure I can feel each gear engage. Shift into reverse also. The purpose of doing this is to make sure that transmission fluid has been distributed throughout all the passages in the transmission and the fluid level will be at its true lowest level. Shift back into park and, with the engine still running, pull out the transmission dipstick, wipe it clean, reinsert it, pull it out again and check the level. The dipstick will be marked similarly to the oil dipstick and you will be able to tell if the fluid level is okay or not.

As stated upthread, transmission fluid should be red. If it isn't or if it smells burned you need to have the transmission checked. Otherwise you should be okay.

If you aren't sure of the location of the transmission dipstick you should be able to google "transmission dipstick location" for your make/model/year car. Trust yourself. You are perfectly capable of doing this and then you don't have to be at the mercy of a potentially unscrupulous mechanic.

I also agree with the upthread post that the brake fluid flush was probably unnecessary. Unless the brake fluid line has rusted (and it shouldn't because brake fluid is a type of oil and should protect against rust), has been contaminated with some other fluid or unless someone has allowed dirt or debris to get into the system when adding brake fluid or changing brake lines (or overheated as mentioned earlier) then you shouldn't have a problem.

Good luck and best wishes.