I have a 04 endeavor. Starts fine. If u put it in gear makes a loud groaning noise. Noise will go away after it warms up. You can let it warmup for 10 min or so and it won"t do it. Definetly worse when its cold out. Don't have to be moving, just in gear. any ideas

 

if the gear is giving noise then it has to be transmission issue. check the transmission mount for faults and also check the transmission liquid if it has turned brown . if it has, then get it changed.

 

unfortunatly sounds like your front pump is in the beginning stages of going bad. cant fully diagnose here but i have seen a few do that. pretty soon the noise will not go away when warm, and get louder. you get the picture where this is going. need to get it properly diagnosed before major damage occurs.

 

Sloving your problem:
Over time, wear roughens your motor and transmission pistons, shafts, gear teeth, pump, sshalf, and shift parts. As those roughen surfaces slide, push, and pull, doing their job, the roughness causes friction chatter. A form of wear resistence develops - like maybe, what chalk does when the angle creates that high pitch noise as you try to keep the chalk moving. That may be what you hear and feel. Make any sense?

If so, eventually, expensive repair will be needed. I've had good success using a product containing friction modifiers to re-smooth the surfaces. Doing so tends to put off the repair need. The brand that works best also adds anti-wear, and conditions the fluid. Just add them and drive. Driving a bit with the product smooths those parts, then coats them to end the problem. Mega Power makes this product for stick shift and automatics. Order online. Over the years, their product has given me and my customers a great smooth shifting ride again, freed of friction caused problems. Hope this tip works for you, too.

 

Would something like help?

 

I wonder if that noise was ever figured out as my 04 Endeavor AWD is doing the same thing. Maybe somebody has some new knowledge on this cold start-up noise.