Ok guys I'm having a very bad vibration under load(shaking the hell out of my car). I think it might be the converter. The converter acts like it's unlocking you give it a little gas at hwy. speeds and it automatically jumps up 1000rpm. My car also threw a couple of codes: Random Missfire, and Trans component slippage. Anyone have any ideas?

 

Nobody? I'm trying to get this worked out before thanksgiving(9hr trip for me).

 

The misfires will cause the converter to unlock. That can also set a slip code,especially if you have a big converter.

Fix the misfire and I bet your trans problems go away.

 

I did see some posts about that and will check it out. Thanks What would cause the terrible vibration I'm getting just driving? It's got to be something driveline related because when it starts I can put in neutral and it doesnt do it, so it's not the suspension or tires.

 

Most will point a finger at the shaft. However I had a similar issue with vibration
which i thought was due to the bent axle flange I overlooked when buying the car. 1 axle later vibration could still be felt. By the time I had time to swap out the trans (which was slipping and unlocking)I found a goodrich replacement with a 2800 tci converter I swapped it all out for a healthy 4l60 in stock form with converter, and a set of wires which cured pretty much all vibration woes for me. another thing to check If you have a stock torque arm check your pinion angle (you will need an angle finder ((most hardware stores cary them)), theres not much you can do to adjust a stock one however if the bushing is collapsed it will have affect on the angle=vibration, and another thing I have seen many things bent even on a stock car this includes torque arms, lcas, etc.

 

Thanks for you input. I just took it to the tranny place and they said it felt like converter flutter(like going over little groves on the shoulder of the HWY). They are putting the stock one back in and see if it goes away.

 

It was the converter Stock one is back in and driving just fine. Looks like I need to call Kevin at TCI.

 

Bain,
Give me a call at (662)224-9355. I will be in for a little while in the morning (Wednesday), but will be out Thursday and Friday for Thanksgiving.
Kevin

 

Will do Kevin, but it will have to be Monday because I'm going out of town for turkey day

 

glad to hear you found the problem in time, and it sounds like Tci is willing to help out...good deal

 

Wow I guess I would have lost that bet! You just made me realize something very important that I hadn't even considered before.

See, it can also work the other way.

This is how it works: the computer determines misfires based on unexpected deviations from the crank position sensor locations. Basicly, if the computer is expecting, say a 100ms delay between signals from the sensor, and it deviates slightly, it is counted as a misfire.

Since the converter was causing the chatter, it was having a slight effect on crankshaft position timing and the computer could not determine the exact cylinder that was the problem, since it was not a firing problem to begin with, and it set a random misfire code, assuming that all cylinders were misfiring for some reason.

In realty, it was a random chatter from the converter clutch apparently.

Hmm, interesting. I'll have to keep that in mind!

 

The dominos have fallen in reverse I guess you could say, very well thought out pete.