Hey guys i got some questions this is my first tundra. ive got 150k good frame good tires good brakes, new lbjs radiator and brake lines. i was wondering what maintenance youd recommend checking on. i also got a rattle coming from the exhaust (im assuming heat plate by the cat) a whine from the engine while under load, and a drop in oil pressure when im braking. it goes right back up to 1/2 when i begin to accelerate again. if anyones got any advice on what i should look for itd be much appreciated thank you for your time.