Loud snapping noise heard when changing gears

Sounds like transmission ban snapped ,time to rebuild

if only the reverse is affected it will not be the converter,if you have no drive in any gears yes the converter drive splines may have stripped but when it happened on my 89 nissan skyline wagon a loud bang was heard when this occurred and i doubt you would have missed this,most likely a snapped reverse band

Can you provide more info? Did you hit a bump? What do you mean by 'drives bumpy?' Does it ride rough, or does it go up and down a lot after you hit a bump, or something else? Can you further describe the snap you heard, and what was going on when you heard it and immediately afterward (e.g., driving 40 mph on a paved road, hit a pot hole, heard a loud 'breaking' sound as if something snapped/broke, and the ride of the car seemed to immediately change to being more harsh/rough)? Have you had any work done recently, such as tires changed or rotated, struts replaced, wheel alignment, or brakes replaced? Did anything else change (e.g., now when you hit a bump, you hear a new noise in the rear)? Were you carrying anything heavy in the trunk or back seat? I had a '99 Corolla for several years, and had zero problems other than a worn out driver's door handle and a couple of cracked windshields. Great car choice!

Sounds like big end bearing gone and oil would probably be coming from gear box and engine seam and falling on exhaust its sounds like a pretty stuffed motor but everything is fixable depending on how much coin it coast and if its worth it cya Neil

You need the have the wheel bearing in that wheel checked

It sounds like one of your CV (constant-velocity) joints is going bad. This is common on front wheel drive vehicles. The CV joint allows the drive axle to pivot as you turn the wheels. Over time the protective boots crack, the grease leaks out and you end up with the knocking noise you describe when turning while accelerating. The dealership should easily be able to inspect the CV joint boot and diagnose the CV joint.

may have snapped a cv joint

Check the idler and tensioner pullys for your serpentine belt. I suspect the whining noise heard earlier was due to the fact one was getting a bit stiff or rough turning. When you gave it that extra fuel, the sudden load may have finished it off. Sometimes they lock up, and sometimes they fall apart. Check those items first.

Does the speedometer work? Sounds like the speed sensor in the differential.

No quick fix. If you are lucky, it is just the flexplate snapped loose from the torque converter. There is usually a door that you take off to access the 4 bolts that hold the flex plate to the converter. Remove that door to see if the bolts have sheared off.