05 tahoe torque converter out. . ??? help

[bcmagg]

today while driving about 70 mph there was a sudden loss of power in the transmission. after stopping and checking the fluid level (looked good) i tried to shift to drive and go but nothing. just rev'd up rpms. so i turn off the engine, wait a minute and try to repeat again. this time i'm able to get to 60ish but after about a minute or two the same thing happens. too soon i'm only able to go to 1st gear manually on the shifter, slowly accelerate.. . shift to 2nd, then 3rd. if i go too fast though, the tranny just loses all power and i have to stop and start all over. i found also that every time it lost power, i HAD to stop the engine and restart it to actually get it to start in 1st gear, 2nd, etc. i was never able to get it above 35-40 mph. please, any suggestions.

thanks in advance.

[troy1]

Service engine soon light on? Something could of failed in the transmission which is plugging the filter which is causing your "loss of power" symptoms. Need to check for codes and do a pan pull to see whats going on. Also you could have one a many engine problems causing a "loss of power" too. So getting it scanned is best.

[bcmagg]

@ troy1, thanks for the response.

for your question, no, the service engine light didn't come on. and yes today i'm going to try and get any error codes pulled from the computer. there is a small noise that seems like it's coming from the bell housing, maybe the torque converter. .? i was thinking to do a stall test but i don't know where to find the stall speed specs for my tahoe (it's not in the manual). i'll post any updates.

[MT-2500]

Stall test rpm's will not tell you much.
As Troy1 said could be engine or transmission codes.
Needs to be put on a transmission/engiune capable scanner and read out data and transmission and engine codes and see what is going on.

Post back any codes you have.

[bcmagg]

@ mt-2500

so i've tried bringing it to local parts stores (bc they're the only thing open) but their scanners can't read the codes bc no service light engine came on ever. as far as the scanner, i'll have to wait till tomorrow.

as for the noise, i removed the starter and dust cover to get a good look into the bell housing and torque converter bolts. the bolts are tight, balance weights are good, and no metallic pieces are in the housing as i've seen in other vehicles with similar noises. i can't tell if the tq is warped from overheating.

until tomorrow. . .

[MT-2500]

Originally Posted by bcmagg

@ mt-2500

so i've tried bringing it to local parts stores (bc they're the only thing open) but their scanners can't read the codes bc no service light engine came on ever. as far as the scanner, i'll have to wait till tomorrow.

as for the noise, i removed the starter and dust cover to get a good look into the bell housing and torque converter bolts. the bolts are tight, balance weights are good, and no metallic pieces are in the housing as i've seen in other vehicles with similar noises. i can't tell if the tq is warped from overheating.

until tomorrow. . .

A good repair shop is the best place to get it checked.
Let us know what a good engine/transmission scanner says.

[bcmagg]

UPDATE

dropped it off at a transmission shop. they scanned it but no error codes have registered so they presume nothing electrical has occurred. after they drove it and it started to slip out of gear they believe the problem and rattling noise could lie with the front bearing area.

we've agreed so far to let me drop the transmission tonight at the house and they'll do a bench look at it tomorrow morning.

[MT-2500]

In your first post you said you had to turn off engine an restart it to get it to work.
That indicates transmission is droping into failsafe mode.

Which should show up and set codes history or present on a good engine/transmission scanner.

I would suggest you find a good repair shop and get it checked before droping transmission and throwing parts at it.

[bcmagg]

right, i'm taking it during lunch to another shop.