Whining noise while accelerating in 1st gear

A loud whining noise on acceleration in a 2010 Mazda Tribute could be a sign of a few different issues. Here are some potential causes:

1. Power steering pump: A whining noise can be an indication of a failing power steering pump. The noise may increase when the steering wheel is turned.
2. Alternator: If the whining noise increases with engine speed, the alternator may be failing. This is because the alternator is responsible for charging the battery and powering the car's electrical system.
3. Transmission: A whining noise during acceleration could also be a sign of transmission issues, such as low transmission fluid levels, worn bearings, or a damaged gear.
4. Differential: A whining noise that increases with speed could also be a sign of a failing differential. This is the part of the car that transfers power from the engine to the wheels.

It's important to have a professional mechanic diagnose and fix the issue to prevent further damage to your vehicle.

Belt may be slipping. Try some belt dressing.

Possible transmission gear noise, but would need to hear it to confirm.

well, without hearing the noise myself, i could guess that the torque converter clutch might be going bad. the torque converter is the part that transfers the power from the engine to the transmission via viscous fluid motion, the converter also has a clutch that internally provides a direct connection inside the converter for better fuel economy. but as with anything labeled as a clutch, it wears down to a point where is slips. the noise your hear could be the torque converter clutch slipping. i owned a 90 astro van with the same drivetrain that made a noise similar to what you speak of up hills. while driving up hills, fully depress the accelerator and if the clunking noise occurs, then the whine goes away as you accelerate faster in a lower gear, very likely this is the case. you would have to have a transmission shop diagnose further. i drove that old van for five more years cause i didn't want to pay to have transmission repaired. it can be very expensive.

It's normal on the AOD transmissions. Their first gear uses straight cut gear and thus has the whining noise. Gear 2, 3 and 4 are helical gears and thus quiet.

Give a try by change your transmission/filters and Transfer case oil.

First signs of the trans going out. rebuild or replace.

Well you can remove the sensor in the diff and make sure that looks ok they g obad quiet often also woulnd not hurt too remove the rear diff cover and inspect the rear end if it is whining and you dont see anything wrong i would refill it with lucas oil/grease and start praying check the pinion too and see if it has any play in it

Id get a mechanic to look at it. Sounds like a rear end bearing problem. Axle bearings pumpkin bearings.

Does this appear to happen when the fan is going? Try having your fan belt checked.