I just had the exhaust manifold changed on my02 echo.I went to pick it up now the trans makes a scraping noise when you shift,car running or not.Any ideas

It’s difficult to say because engines make a wide variety of noises.
Rattling, possibly a worn timing chain.
Misfiring, possibly incorrect valve timing or damaged head gasket.
Metallic scraping, possibly a lack of oil pressure causing bearing to run dry.
Knocking, possibly worn mains or big end bearings.
Loud exhaust noise, possibly a blown exhaust manifold gasket.

There are a wide variety of possible noises and therefore a wide variety of possible causes

by changing the exhaust I take it that you removed the standard exhaust manifold and fitted extractors in instead. The noise may not be lifters but a exhaust leak form the exhaust not being fitted properly (gasket ) or just and gas noise as the exhaust valve opens that is normally silenced by a stock manifold.

check transmission fluid and notice color if dark red or maroon a trans mission fluid and filter change is in order/everybody changes the oil/filter but not transmission fluid and filter this is working 10 more and hard than the engine!/sorry when off ! sound like no overdrive concern could be stuck valve onside trans (please note when pan is dropped a little metal is normal chucks is not)good luck!

Toni, is your car making noises while your driving? Although your lights work, still check the battery level. Make sure everything is the way it should be first. If your check engine light is on, get it scanned at Autozone, it is free. You may have an issue with your transmission or shifting components. Did it continue to make noises when shifting? I need a little more detail please.

YOU GOT IT. I'm sure the oil pressure went low when the car was on ramps causing a CE light. The louder noise poss wrong belt or exhaust leak!?

A leaking exhaust manifold could make a ticking noise. So could a lifter or valve. The exhaust noise would be louder under load.
If the carb is running too lean, or you have a vac leak, the lean fuel mixture could make the exhaust leak worse, and cause the loss of power.

exhaust leaks usually mean repairing /replacing problem, usually can cost a few bucks, depending on the mileage on the vehicle and how it was maintained is to wether you can switch to synthetic oil. I run it in my 02 cougar since new and fine, but once the motors start to weear out, better off staying with a regular/semi synthetic oil...7 years, id change the trans fluid, sounds like reasonable pricing.

i have a 2003 echo and it has done the same thing since i got it .bought it with 29 k i now have 147 k never did anything .i did ask and got 2 answers .1 was the coolant sensor under the intake manifold needs to be changed and from what ive heard it is a lot of work . the other was from a tech and he said it was to let the engine heat up to prevent the build up of sludge in the engine which i think is a crock of ,,,.any way ihaven,t done anything in over 100k and no ill effects.i will admit sometimes it does annoy me but not enough to act yet .

Sounds like either the pump went out or something is not installed in the case properly.

STOP TRYING TO DRIVE IT OR EVEN RUN IT!!!!

Take it back to where you had it serviced and have them make it right.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

You can drive the car nearly forever with these noise concerns, the trans noise which is the synchronizer ring may cause an issue in the long run, I have no clue what sensor they are talking about, but sensors don't make any noise, they are electronic parts.