Over the last couple days ive noticed that when i drive my truck in reverse, like backing out of a parking space or up to a trailer, i hear a loud "clunk" a split second after i accelerate. it doesnt happen if i just ease into it, it only seems to occur when i get a bit "aggressive" in reverse. nothing seems to be working improperly, i just figured id get some opinions from people more knowledgeable than I before it potentially turns into a problem.

ive done a couple searches but most, if not all similar threads dont mention the problem specifically in reverse? im %90 clueless when it comes to this type of thing so any help would be great.

sounds like you need new rear U-joints

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01 Ranger XLT 4.0 Auto stepside 4wd
MODS: K&N drop in with silencer removed, throttle cable mod, HID 6000k, dual exhaust, euro tails, stock rims with 265/75r16 Enduro runway M/Ts (winter tires), bucket seats, center console, and black plastic inside, white gauges, 2 P.Miller 12s with 2 800 watt Pioneer amps, Kenwood deck and Kicker 6x8 in front and pioneer 6x8s in the rear(soon to match the front)

grinded gears?

nicksranger01 - ill look into it, thanks for the help.

oyadesertya - are you asking a question or proposing a diagnosis?

U joints or a loose rear end...check the u bolts holding the axil to the springs.
Could also be the bushing are shot where the rear springs attach to the frame brackets.

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2008 Ranger XLT 4X4 V6 4.0 Torch Red
Bought September 29, 2011 mileage 13,800 2nd owner

Mods:
Retractable Truck Stake Pocket Anchors...installed 10-5-11, AVS Window Vent Visors, 10-6-11,Tonneau Cover, 10-15-11, Alarm/remote start and locks, 10-25-11, Bed Lights 11-13-11, front mud flaps 11-20-11, deer whistles 11-25-11, brake lite Ford emblem 12-7-11

ambenz - thanks, ill add those to the list

im taking an educated guess haha