This got long so I had to shorten it. I have a 2000 TJ 6cyl Auto. Maybe the only relevant mod (that I cna think of) is a transfer case skid that's basically only as low as the frame. So that changes the angle of the whole engine/trans/tcase.
I milkshaked my transmission. And got Aamco to rebuilt it. $2000.
Few days later, check engine light. I bring it back, they replace spark plugs. $??
Few weeks later, misfires. I think I called them or brought it back and they said bring it to an auto electric specialist. So I did, and they couldn't figure it out, and charge me $130. They had it for like a month.
Few weeks after that, I bring it to another garage, and I ask them to do an engine clean and to help diagnose. They clean the engine internals, can't figure out the misfires. I only pay for the engine clean.
Meanwhile the entire time I was looking at similar threads online. I pull the coil pack rail, test the voltage. Every pack seems to be within spec, so far as I could tell.
I give up.
I go to OK4WD and they say do a full engine diagnostic and say the engine is great and the sound is coming from the transfer case. They do not indicate any other issues. I think it ended up being like $300.
I go to a different
Aamco because there aren't many other local transmission options that have good reviews. I don't know if the previous Aamco is at fault with the original rebuilt, but they went out of business so I definitely can't go there. And other local places couldn't diagnose the problems back in 2008. And Aamco is free to look at it, so why not take the gamble.
I drop off my Jeep at the Aamco and they call and say they can hear arcing in the coil pack rail and it needs to be replaced for sure. And they said a couple O2 sensors are busted based on codes. They tell me the price of the parts, which are like double of what I can get online. But I want to get it fixed and back offroading, so I agree to to the $800 charge for labor, rail, and 3 bosch o2 sensors. I pay and bring it home happy. They were not able to reproduce the noiss from the transmission.
Within 24 hours, the sound from the transmission area comes back. I bring it back and tell them to run it hot. They can reproduce it now, and say they firmly believe it's the flex plate. And they said to be sure they need to drop it, and they want to order the part. I give them the thumbs up.
Few days later, they call back and say it's fixed. I asked for the flex plate, which doesn't seem damaged at all, but with such little clearance I guess any little warping or micro crack could have been the cause. ALso, I'm not sure what the difference is and I need to wrap this up so I'll google it later, but the box I got back my part in was a manual transmission fly wheel. For the record. I pay $800 and bring it home. Runs great, but at 65 mph I feel it might have a little more vibration than before. I shrug it off and plan to drive it more to determine if that's true.
Within 24 hours of getting it back, it makes a whining sound anytime (EDIT)
I press on the gas hard causing the RPMs to spike (like If I was getting up a hill or entering a highway). I don't think it did that on the ride home. Either way, that's the current issue.
This morning, I call Aamco back and they said they would look at it. They were quick to say that it sounds internal and they weren't inside the trans or torque converter. I say I understand that but I'm concerned because this only came about after you were in that area. We agreed to drop it off within the next few days to take a look.
Since so much time has elapsed between the original rebuilt, I can't say for sure that the original rebuilt is at fault. Even though less than 2-3k miles have been put on it... and now that torque converter could be busted... it feels like a botched rebuild. But it's not fair to make that a statement. So I'm going to ignore that.
So, focusing on the present, how do I handle this current issue? Lets say they say the torque converter is messed up. I could ask what the cause is. They'll want to drop the transmission again to give me a firm answer. Probably looking at another $600 then. Is this within the bounds of the warranty they issued me for the work on the fly wheel? Could work on one cause an issue with the other?
I honestly just want to say "why didn't you see this when I asked if everything down there with the transmission looks good" ????? But can I really be that idealistic about it? I don't think so, they're only human and if it wasn't making the issue until I put 20 miles on it how realistic is it that they would uncover the issue, if it truly has nothing to do with the work they did?
I'll drop it off and let you guys know what they tell me.
Sorry this was so long. I wanted to be as thorough as I could considering if things don't work out I might give up again.
1. Appears to be more significant with higher RPM. However, I'm not 100% sure it's related to a downshifting scenario.
2. The shop I took it to modified my dust cover (see before and after images here: http://imgur.com/a/mN3Hg
), but I'm asking them to install a full one.
3. Fluid is pink and clear of bubbles and within the OK area on the dipstick, running warm in neutral.
4. Confirming from shop what fluid they put in it.