I have a 94 4runner with an A340H tranny, I was driving down 95 yesterday everything going fine then all the sudden she starts down sifting all the way and lose power pull off stop and she shuts off and is overheated. let her cool off starts up and revs up fine but when in gear moves but has no power, kinda like its slipping. Im thinking bad converter or converter cluctch is starting to go. I know if ur converter is completely bad you truck wont move at all and that y im thinking converter clutch? any thoughts?

 

or maybe the oil pump in the tranns?

 

Bad day dude, sorry hear youre having problems with your tranny. I would pull up an FSM and start looking at the troubleshooting sections.

Best advice i can give, 5 speed swap it. It is VERY worth it.

 

haha ya i should had done a 5 speed swap when I REPLACED this tranny a month or two ago, it came from a junk yard with 80,000 miles on it and i got it for a good deal my last one reverse went out on it and i think this one just needs a new converter but idk, so im trying to get a lil info but ya i got a FSM for the A340H tranny and it showed me a way to test the converter clutch but u need this stupid tool and i don't have one but does anyone know where i could get one?

 

does anyone else think it might the torque converter/ converter clutch? and another reason?

 

Ya i made the mistake of putting another auto tranny in mine too. Got it right the 3rd time though haha. I see your problem, its not always easy to do the tests in the way they do. Cant you do a converter stall test to see if your TC is going out? check for that test in the fsm, maybe that'll do it.

 

Alright ya i see the stall test and where it saying if rpm is lower than specified value converter clutch my be faulty. is the stall test and converter stall test the same? and also in the test it says Stall speed: 2,850 f 150 RPM, what does this mean excatly?

 

Have you perused?

http://www.pirate4x4.com/forum/showthread.php?t=587521

Does your OD/ off light work?

" When the computer detects a mechanical or speed sensor problem, it goes into a "limp home" or failsafe mode. It will defaut into 3rd gear (direct drive) and the OD light will flash."

 

yes it does work and it doesn't flash like in the quote u posted and it shifts fine, it doesnt start off in 3rd gear