MJfromMD

This sounds like the same deal to me. I have a 98 T-100 SR5 4x4 SC 5vz-fe with auto trans.

The knocking metallic noise comes on like a rattle after warm up, but only noticeable at idle. Shifting through gears may temporarily stop noise momentarily, but it resumes most times after a few seconds. Performance etc. seems fine but noise is obviously in need of investigation and remedy.

I am going to crawl under there today and try to get a peek at the converter bolts, etc.

If this get resolved in the meantime, I sure hope someone will post their findings.

terminator

iTrader: (1)

Decided not to pull the trans but to run with the noise until I have some kind of failure. Pretty sure the flexplate may be cracked or damaged so I'm going to drive until the trans absolutely has to come out.

j2the-e

Have you priced out a new torque converter? If you keep driving with a damaged flex plate, it will damage the converter too. Fix it before it goes boom...

terminator

iTrader: (1)

Dealer flex plate and converter are way too much. There is an aftermarket converter but still costs a lot, I have a spare flex plate. I've located a good used trans locally that I'm going to pick up and hang on to until I can either afford to put it in or mine finally gives up and I am forced to have it installed.

terminator

iTrader: (1)

Well I finally found out what the noise was, a SEVERELY cracked flexplate. I mean so bad that there was only about a 3/8" part in the center area that was holding it together. It was cracked completely around in the center and ready to come apart. I'll get pics when it's light out b/c you have to see it to believe it.

terminator

iTrader: (1)

OK, here are the pics. I'm assuming that Advance Engine Exchange in Louisville, KY replaced the cracked flexplate when they put the engine in @ 50K ago. I saw it and it was definitely cracked so I wouldn't think that a new flexplate would do this in 50K.

Texas_Ace

Wow, thats scary. I wounder what caused that, misaligned on install?

jdl25

iTrader: (1)

That looks like it had one foot in the grave and the other on a banana peel.

terminator

iTrader: (1)

There's no telling Ace. I have no faith that the shop in KY that installed the engine did anything right other than finding a decent engine. Since then I've had issues with the crank pulley not being properly torqued causing wear on the Woodruff Key which lead to a stuttering at passing gear and now this.

JD, that's the truth! About 3/8" from major disaster.

Stuckindmud

hey all,

I wanted to bring this thread back to life. I have a similar noise coming from my 2002 4Runner, after just doing a timing belt change.

Timing is on point and I have the pictures to confirm the line up.

Obviously yours was the flywheel / flex-plate, is there any way to check that without pulling the transmission?

terminator

iTrader: (1)

Should be able to either pull the starter and rotate the engine, can't remember if there is a lower plate on the bell housing that's removable to get a boroscope up in.