99transformula

iTrader: (1)

I have noticed a knocking coming from underneath (sounds like its under the center console) sometimes under hard acceleration ever since my LTs were installed I thought it was the exhaust banging underneath the car but its pretty snug anybody else have this or know how to fix it

theinstag8r

iTrader: (3)

it's the y slapping your floor pan. Did you change the mounts to poly when you were in there??? If not that is why its hitting.

99transformula

iTrader: (1)

???? I didnt know I was supposed to change any mounts

theinstag8r

iTrader: (3)

yeah, if you leave the stockers in there the motor moves around to much and causes your y to bang. most people change out the rubber in the clams to poly to prevent the motor from moving too much.

99transformula

iTrader: (1)

Thanks so does it eliminate the y pipe banging or just reduce it

theinstag8r

iTrader: (3)

on my 98 i put in polys and then adjusted my y-pipe ( it was from texas speed. 4pcs). Loosened all the connections stuck a 5/8 socket between the y and floor pan under drivers side. then jacked up on the I-pipe and tightened everything up. Sometimes it takes awhile to tweak them but when i did all that I never had a problem again.