LQ9 4L80E intermitent noise
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Teching In
Joined: Nov 2006
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LQ9 4L80E intermitent noise I am trying to determine the cause of an intermittent squealing/scraping noise coming from the flexplate/converter area of an LQ9 4L80E installed in a fiberglass hot rod. The noise comes and goes but is noticeably worse after the engine is warmed up or after hard acceleration. There is no evidence of anything rubbing together.
I unbolted the converter from the flexplate. The converter rotates fine although there is only about 1/32 to 1/16 inch freeplay between the converter and flexplate. Other than the noise the truck runs and shifts fine. Any ideas on what would cause this or anything else I could check?
Pulling the engine on this thing would be absolute Hell, don't make me do it!
Thanks for any help you can offer.
Kevin
Finato Group
37 Ford pickup, LQ9, 4L80E, FAST intake, T.B., M.A.F, injectors and rails. 420HP
I unbolted the converter from the flexplate. The converter rotates fine although there is only about 1/32 to 1/16 inch freeplay between the converter and flexplate. Other than the noise the truck runs and shifts fine. Any ideas on what would cause this or anything else I could check?
Pulling the engine on this thing would be absolute Hell, don't make me do it!
Thanks for any help you can offer.
Kevin
Finato Group
37 Ford pickup, LQ9, 4L80E, FAST intake, T.B., M.A.F, injectors and rails. 420HP
The only thing I can think of would be the inner pump gear rubbing on the crescent or possibly a pump bushing that is toast. Not sure but let us know what you find. Vince
