Jeep Cherokee making a knocking noise & seems to be jerking in and out while accelerating...any clue?

Question

I posted similar question a little while ago but would like more answers....thanks.

93,000 miles
Engine size is 4.7L 8 cyl
4WD all the time
Problem is when it reaches a speed of about 40 to 45 miles an hour while pressing the accelerator it makes a knocking noise. I took it to get it tested and I would like someone else opinion. I am taking it to a different shop tomorrow but in the mean time.....they drove it and hooked it to a machine and said it had torqe converter failure and it showed an error on the gear ratio. They told me it's gonna cost $429 JUST to take out the transmission and look to see exactly what is wrong but it could be a number of things once they get inside the transmission. Anyone heard of this before? I have never had to take a vehicle to the shop so I don't know what to expect. Thanks.

Answer 1

Fault overdrive. That's the ONLY thing that makes any sense.

Do you have the option of turning off the OD?

Have you checked the basics yourself?
Fliud level.?
Could be a plugged trans filter.?
Does anything under it seem loose? Drive line, Ujoints, axles,
What does the trans. fluid look and smell like?

Loose bolts at the flex plate to the crankshaft, cracked flex plate.
Loose bolts from the torque converter to the flex plate?

Answer 2

i would definitely get a different opinion. ask the dealer if they've seen this before in these jeeps. they may know exactly what is wrong but not letting all the info out. either way it sounds like your at there mercy and it will probably be expensive. good luck

Answer 3

Transmission problems are the worst. When you're talking about big $ problems, it's always a good idea to take it to a couple places to find the best deal, if it's still driveable. Good luck.

Answer 4

hello to the tranny guy