1998 D1 with loud rattle

Tedlou

Well-known member
Jun 30, 2004
209
6
64
Reading, Pa
My son's D1 just developed a loud rattle yesterday from under the truck. Not a knock or tick - but a loud rattle. Not sure if it is one of the cats or something else. It doesn't sound like it's coming from the engine. It seems to lessen when the engine RPMs are increased. I am not sure what the issue is and can't look at it until this weekend because of my job. He is not driving it until we find the issue, just wanted to get some sage advice that D-WEB is known for before I look at it.
 

p m

Administrator
Staff member
Apr 19, 2004
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La Jolla, CA
www.3rj.org
I would check if the tabs on the CkPS tone ring are not coming into contact with the CkPS.
It happened to my D1 around 284kmi. It was making sheetmetal-ly rattling sounds for several months, after which the tone ring fell completely off the flywheel, bent the CkPS, bent itself, and ... necessitated replacement of the flywheel and ring.
 

Tedlou

Well-known member
Jun 30, 2004
209
6
64
Reading, Pa
Thanks for the advice everyone. After we took the flywheel inspection plate and turned it one tooth at a time looking for effed tabs on the tone ring and not finding any, we decided to wack CATs with a rubber hammer - the one on the driver side sounded like it was full of marbles. I think we found the problem. I will say these trucks sound good with open headers......to bad you can't drive it that way... :sneaky:
 
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