Good Teamwork as a Driver:

In our tank crews usually the tank commander is calling the shots and plays. As a driver it's critical to follow your TC's lead, ie; do not move the tank until you get the command under any normal circumstance. Doing so will make your gunner shank shots, TC lose vision or get disoriented, and likely get you killed. Fight the urge and trust your crew to do their jobs, at all costs. TC is the brains, gunner is the killer, and you get them all to the place to do their part. Listen to your TC.

In an absolute life or death emergency where you need to make a small maneuver or its lights out, call it out as soon as possible while performing it. "Angling tank right", "satchel close left" etc. Make the call outs as fast and as poignant as possible to not overload your other crew who are focusing on their own position demands, and are going to get freaked out by your abrupt movements. These positional changes should very rarely occur if ever.

Don't hesitate to make call outs as you see them to your team, but make them as short and accurate as possible. I like to rely on the compass marks as they're a universal reference point between all positions. "Tiger, top of the hill, 187" is far superior to "uhh tiger up there, north by the tree, do you see it?".

Driving:

It's been my experience that turning in reverse rather than 1st is typically far faster regardless of tank. So if the TC calls out "spin left, satchel guy!", I will typically reverse hard right. In these spins try to anticipate when your main gun will cover the target to stop without the gunner having to rotate the turret, which costs precious time and can make the difference.

Use the terrain to your turning advantage. The less tank track surface that is connected to ground, the tighter and smoother you can turn. Try it on different surfaces (garbage heaps in Carentan, berms on the side of roads and between hedge rows). Be aware though that you can straddle things like low walls and random shovels etc that will effectively leave you stuck and embarrassed if the tank is straddling it with no track-to-ground contact.

Try to hit all elevation changes at an angle. That is, always approach tall berms, hills, piles of crap at around a 30 to 45 degree angle. Doing so will maintain your rpm, speed, and help you avoid getting stuck on obstacles.

RPM, Speed, and Machine Gunning Nerds for the New Driver:

The tanks all have different turning radius, speeds, and acceleration. Jump in the practice server, or an empty server and really get comfortable with each. Focus on getting the feeling for turns in 1st particularly, in my opinion.

This might be controversial to some TC's, but I will use down shifting to control speed in certain situations. If we are charging a hard point and I notice the gunner is reloading a round, about to plaster a target if he can get the round in the chamber in time, I will downshift 1 to 2 gears momentarily to buy him the time. I would typically not drop below two gears total in any situation. You can find different scenarios where going from 4th to 3rd or 2nd, or 2nd to 1st will buy you an invaluable few seconds in the right situations, if you are aware of the current threats. This may freak out your TC.

Always keep your RPM at 2500/max. This is just a Hell Let Loose fact of life. If you do not, you will probably stall and have to downshift all the way to 1st and climb back up, possibly getting you killed in the process.

If you are losing rpm, downshift while keeping the throttle at max (holding W) until you get back to 2500, then upshift, wait a second or 2, and upshift again etc.

You have a machine gun, don't be afraid to use it. It's fun to rake enemies down when they least expect it from a hull mg. It can be a great infantry deterrent while your gunner is otherwise occupied. However it is best used in short bursts of 5 to 10 rounds. Veteran players will key in on sustained fire and use it, and your tracers, to locate you. This is even more important on night maps where your tracers look like laser beams.

The Old Quick Turn:

I'm not taking credit for this, I believe it was the TL guys who discovered it a few years ago. The Jumbo 76 has a unique attribute in that you can turn extremely fast on a fixed point. To do this you should already be in 4th gear at 2500 rpm. In one operation hit and hold either A,W, and downshift ( shift by default) or D,W and Shift until you drop to 2nd gear. As soon as you land in second gear immediately release only the shift key and you will effectively "spin on a dime". This is very useful for anti tank attacks from behind or to the sides. Afaik no other tank can do this reliably, although I have done it in a tiger once or twice, way back in the day.

If you miss the shift or are not at full rpm the entire maneuver, you will stall and have to go to first and start over, and probably die. So practice it, and don't gamble with it in the moment.

It helps to listen for 2 distinct shift click noises (clunk...clunk) before releasing the shift key, don't rely on the actual gear indicator on screen.