1994 F150 clicking sound from underneath when putting in D or R and starting to accelerate? It has a upgraded rear differential so we don't think that's the problem.

SOURCE: 1994 Honda Accord Rear Disc Brakes

you get all the lug nuts tight, the weight of the car on a loose lug can make that noise from the wheel, jack the car up and manually spin the tire, if you can give a more indepth description ill try to help, i have OnDemand5 if you have any other questions

SOURCE: differential noise/whine when of 1994 land rover discovery

Sounds Like Pinion Bearings , But Carrier Bearings Should Be Replaced (In My Opinion) as they Could Be Contaminated

SOURCE: 94 F150 5L won't crank

Sounds like your starter has decided not to work anymore.

SOURCE: 95 4Runner, hearing a rattling sound underneath,

rattling when doing what? if it rattles when it is running or when it is driving, this will tell you roughly where to look. If rattling while idling, coming from engine or transmission. If you ONLY hear it when you are driving, check you U joint. they can wear out and start to rattle and clunk sometimes, especially when going in and out of gear...reverse to drive etc...

SOURCE: There is a loud noise coming from the rear end

Had something like this with my much loved 6 cylinder Camry. Turned out to be a wheel bearing. You can check by raising the rear wheel off the ground with the jack and if you can move the wheel in and out, you need a wheel bearing. And it is a safety issue - when bad enough the wheel can come off the car, definitely a life changing experience. Check both rear wheels, just take a few minutes of your time. Don't believe the Elantra or any other front wheel drive car has a differential, those are used in rear wheel drive vehicles.