MustangWorks.com : Ford Forums - View Single Post - i hear Klunking and a feel Bucking ?!

i have a 90 mustang w/mods listed below.

When im driving my car slow at low rpms, around 1500 i hear a Klunking and my car starts bucking my head back an fourth ?? Any ideas , U-joints Torque Boxs ? please help thanks

__________________
1990 Mustang GT

Engine- 308 (bored .40 over) Probe Forged pistons (10.5:1), Scat forged crank and rods, w/Main Girdle, AFR 185 heads, GT-40 intake, CSI electric water pump. AC delete kit, No smog pump, Manual rack and pinion steering.

Ignition- MSD 6AL, MSD Blaster coil, MSD hellicore wires.

Drive Train- Tremic 3550, Alum. Drive shaft, 3:73 gears, Stock carrier and axels. 26X11.5 M/T Et streets.

Power adder- 175 shot of laughing gas.

Best ET 11.5 @120mph on squeeze, 12.4 @109mph on muscle (on gt40 heads)

on the 185 heads ... ??? tba

04-28-2004, 11:42 AM	#1
leathal injection Registered Member Join Date: Mar 2004 Location: Long Island Posts: 58	i hear Klunking and a feel Bucking ?! i have a 90 mustang w/mods listed below. When im driving my car slow at low rpms, around 1500 i hear a Klunking and my car starts bucking my head back an fourth ?? Any ideas , U-joints Torque Boxs ? please help thanks __________________ 1990 Mustang GT Engine- 308 (bored .40 over) Probe Forged pistons (10.5:1), Scat forged crank and rods, w/Main Girdle, AFR 185 heads, GT-40 intake, CSI electric water pump. AC delete kit, No smog pump, Manual rack and pinion steering. Ignition- MSD 6AL, MSD Blaster coil, MSD hellicore wires. Drive Train- Tremic 3550, Alum. Drive shaft, 3:73 gears, Stock carrier and axels. 26X11.5 M/T Et streets. Power adder- 175 shot of laughing gas. Best ET 11.5 @120mph on squeeze, 12.4 @109mph on muscle (on gt40 heads) on the 185 heads ... ??? tba