Strange noise under truck..

Guys,

I was up under the truck and was hearing a knock that at first sounds really bad. I was thinking rod knock/piston slap.

I changed the rod bearings and that didn't take care of the noise. It wasn't worse, it wasn't better.

Now, after changing out the rod bearings, I have lain up under the truck and the sounds appear to be coming from the rear of the engine/front of the bellhousing. I have not located the exact spot yet.

Could the flywheel or torque converter be making this noise?

When you start the truck, it is loud. At idle or low speed, the sound is very noticable. The truck drives very well, the engine has very good performance and the gas milage is good (13mpg). The transmission shifts fine at all speeds.

I'm just concerned that the noise could be something in the transmission.

Any ideas?

Thanks...


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Byron Yeiser
'88 Grand Wagoneer
"The Wanderer II"
360/727/NP229

'87 Grand Wagoneer
"The Wanderer"
360/727/NP229

Home of Loaded Camera Photography
photos@loadedcamera.com

Quote: "Offroad? You mean there's an On-road?"

Did you check for exhaust leaks? They can make all kinds of deceiving noises (AMHIK)...
Good luck
Mikel

1978 Jeep Cherokee Chief 360/T-18A/Dana20

OK see the post by FSJNUT re "how much should a flex plate flex".

might be similar problems.


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AKA RUDY79.
1979 WAGONEER, 360, TH400, Q- TRAC. 3" ADD A LEAFS, 31" MUD T/A'S (PEP BOYS CLONES).
" Go farther, it only breaks on the street"