My 2003 4.0 jeep rubicon wont back up. tranny fluid is good. i put it in reverse and it goes in gear but when i hit the gas it and wont budge. its an automatic. it will also hesitate in drive when i first start out. rest of the gears are fine.

Check and see will it move in low or reverse. If it wont move ONLY in drive and will move in other gears, your overdrive clutches are destroyed and the computer has placed the vehicle into "limp home" mode. meaning you cannot hurt it any more than you already have. If it wont move in ANY gear, put some tranny fluid in it. Start it and put in "N" with the e-brake on and check the fluid level with the dipstick.

change screen or filter in transmission put old fluid back in though

you need a different tranny because the reverse is a direct gear and is doent engage,the reverse doest work with the drive gear system,so you have a internal mechanical problem in you tranny

Have you checked the tranny fluid could be low on fluid. This would cause it not to shift or jump into gear. Also make sure the shifter is moving on the tranny a linkage could have come loose.

replace tranny filter and fluid, do not do tranny flush, could cause more problem. just filter and fluid change

Two things. Your MAF SENSORor your brakes are on, 3 things, or your clutch is slipping. Good Luck

I would first check the transmission fluid.
if were good there then its something internal.
RD

chheck your tranny fluid. if it's ok, probably need tranny work done.

how many miles on trans? does fluid smell burnt?350 turbos are good tranneys but they do go bad. in my experance its reverse that goes out first on thies transmissions but thats not saying that it does not happen the other way either. my best guess is you need a rebuild. when you say it tries to move in forward gear that tells me that the clutches are shot. 350 turbos are worth rebuilding. its up to you.

Check the condition of the tranny oil on the dipstick. If it's black and smelly, the tranny clutches might be worn out. Make sure you have enough fluid in there first. Check the fluid with the car engine running and the tranny in park. The level should be between the 2 marks.