i recently installed some rocker arms, and a new rearend on my 84 Z28, at idle it seems fine, when i start driving as soon as i hit about 10mph you can hear a pretty loud ticking sound

could over tightening the rockers cause this noise only when driving and not when idle?

 

any ideas?

 

no could be slight detonation if you installed a higher ratio rocker. try a higher octane gas next time you fill up. Are you sure it's not coming from the rear end?

~Couch

 

there identical rockers...

im not sure, the noise starts as soon as i pass say 10mph so kinda hard to hear exactly where its coming from

 

ok i dont think its coming from the engine compartment, i did a whole rear suspension recently including the rearend and driveshaft, could the drivshaft cause this noise? and how can i make sure, Thanks.

 

ya u joints can jack it up by the axle support the axle with jackstands put it in gear slide under, and listen should be easy to find

~Couch

 

ok, jacked it up, and im almost sure its coming from the transmission, what would cause this? it was fine before i did the rearend work...

 

probably unrelated, check to make sure the flex plates bolts are tight, my freind had this issue with his 4L60 where someting broke in the trans. and made a real funny noise I'm trying to remember what that was exactly. The sun gear breaks all the time in those tranny's also the 4L60's, and the 700's. May be time for that dreaded rebuild. That is if the flex plate bolts arren't loose. They can make all kinds of funny sounds.

~Couch

 

thanks, the trans was rebuilt not even 10000miles ago, i will remove the cover later today and check the flywheel bolts, any other thoughts are welcomed...