i've tryed everything that i can think of and its still there. i get agrinding noise at about 1500 rpm when i push throttle about 1/4" to 1/2". i've changed fluid tightened every bolt checked u-joints there was no metal shavings in bottom of transmission when i changed filter i adjusted tv cable i checked front and rear wheel bearings its not that what can it be im goin crazy here its a 89 rs 305 tbi 700r4

 

Just something to check, but is your exhaust contacting the car body at all? Sometimes the exhaust will go into resonance and vibrate against the body making a grinding noise. Good luck.

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1992 Camaro Z28; Engine:383 w/Ported Edelbrock RPM heads. Lunati Solid Roller Cam 224/232 .502/.502, Fluidampr, Comp Cams 1.5 Roller rockers and lifters, Comp Cams Triple Valvesprings, SVO 30 lb injectors. Holley/Walbro 255 lph in-tank pump, Haltech E6GM DFI, SLP 1 3/4" headers, 4" Mufflex, T56, SLP Clutch, Pro-5.0 Shifter, 4.10 Gear, Auburn Offroad Pro Posi. Super Ram. 17" X 9.5" Ronal FireHawk Rims w/ 275 40ZR17 Bridgestone RE 730's up front and Nitto Drag NT 555R's out back.

Double-Pump This! EFI Rules!

 

thanks but i checked today and theres no scratch marks underneath car around the exhaust

 

i found the problem i had a loose torque converter bolt