Knocking noise while in reverse

[waddsn1060]

Whenever Im in reverse I get a single knock from the drivers side of the engine compartment. Any ideas on what this could be?

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91 BLACK MTX

DYNOED ON DYNOJET: 199.6HP, 187.1LB/FT
CENTERFORCE CLUTCH,GRIZZLY PAW THROWOUT BEARING,EIBACH SPRINGS,TOKICO STRUTS,BORLA CATBACK (35HP MY ASS!), SHO SHOP HI FLOW Y-PIPE, SUPERCHIP,73MM MAF, BOXLESS, SS CAI, SVO ROD SHIFTER, FRONT AND REAR STRUT TOWER BRACES,PP MOTOR MOUNTS, CRAP TINTS, PIAA 1500XT "FOGS" Hehe, POLICE GRILL,
SONY XPLOD CDX M-620 RECEIVER
Dunlop SP 5000 Asymetrical 225/55/WR16
PLATES: SHO GN 91
AIM:waddsn1060
SHOCAGO MEMBER

 

[AutoXSHO]

A single knock? Possibly a motor mount. Do the motor mount test as described on shotimes.com. If it's not that, it's probably a suspension component wearing out. My car would clunk one way when I backed up and then clunk back the other way when I drove off in first. It ended up being the subframe shifting due to worn SFBs.

John V

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95 MTX with mods.

 

[Mikeys_Taurus]

Also check your sway bars. I had a bad bushing and my sway bar would hit the frame when in reverse.

 

[waddsn1060]

I know its not a motor mount, I had PP ones put on some 10K miles ago and there are no other signs. I checked on the sway bars, no problems there. Suspenion component ey?

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91 BLACK MTX

DYNOED ON DYNOJET: 199.6HP, 187.1LB/FT
CENTERFORCE CLUTCH,GRIZZLY PAW THROWOUT BEARING,EIBACH SPRINGS,TOKICO STRUTS,BORLA CATBACK (35HP MY ASS!), SHO SHOP HI FLOW Y-PIPE, SUPERCHIP,73MM MAF, BOXLESS, SS CAI, SVO ROD SHIFTER, FRONT AND REAR STRUT TOWER BRACES,PP MOTOR MOUNTS, CRAP TINTS, PIAA 1500XT "FOGS" Hehe, POLICE GRILL,
SONY XPLOD CDX M-620 RECEIVER
Dunlop SP 5000 Asymetrical 225/55/WR16
PLATES: SHO GN 91
AIM:waddsn1060
SHOCAGO MEMBER