Jason_Staggs
OBS Enthusiast
Yeah it’s torsion bar. I believe all 4wd 400s are but I’m not 100% on that. I’ll give that a look before I yank the transmission tonight.Just a thought... does your model truck have torsion bar front suspension? I had a 2004 Suburban 2500 that used to clunk like this when you put it in reverse. Turned out that the bushings on the torsion bar mount, where it connects with the frame, were bad on the left side.