bulldog man Posted May 16, 2007 Share Posted May 16, 2007 I have a question yall like yall @ 1 time or another i have seen the frame crack @ 1 point oranother due to age or stress but ive always seen them crack behind the cab back as far as the rear tandem or around the trunion but never in front of the steer axle . A old friend of my late granddad had a 86 RD686S factory double frame factory made dump That the frame cracked right in front of steer axle on the drivers side last week he said he was gonna part it out but im curious what could have caused this ? too much torque or POPPING THE CLUTCH While the truck was loaded or cutting too short while loaded ? Or a motor mount gone bad & too much torque& stress on the frame ? im curious to know YOUR IDEAS YALL On this yall ive never seen a truck frame crack right in front of the steer axle later yall Quote You Cant Fix Stupid. But You Can Numb It With A Sledgehammer. Link to comment https://www.bigmacktrucks.com/topic/2480-frame-question/ Share on other sites More sharing options...
Mack Doctor Jr. Posted May 17, 2007 Share Posted May 17, 2007 The only places on the frame i have ever seen crack are behind the cab, or by the spring hanger shackle on the passenger side ( mostly due to the notch in the frame from the factory). Also when they double frame macks keep in mind they start the process at the front shock mount not at the very begining. If it were my guess thats where it cracked right at the shock mount. Im curious let me know if u find out. Thanks ~Joe Quote Link to comment https://www.bigmacktrucks.com/topic/2480-frame-question/#findComment-12234 Share on other sites More sharing options...
bulldog man Posted May 21, 2007 Author Share Posted May 21, 2007 will do im puzzled on this 1 too later yall Quote You Cant Fix Stupid. But You Can Numb It With A Sledgehammer. Link to comment https://www.bigmacktrucks.com/topic/2480-frame-question/#findComment-12297 Share on other sites More sharing options...
mudslut28 Posted May 30, 2007 Share Posted May 30, 2007 All of them I have seen cracked were behind the cab...I have one thats quadruple framed behind the cab myself..lol. Quote Link to comment https://www.bigmacktrucks.com/topic/2480-frame-question/#findComment-12467 Share on other sites More sharing options...
chris88 Posted May 31, 2007 Share Posted May 31, 2007 Thats one hell of a heavy duty truck. Quote Link to comment https://www.bigmacktrucks.com/topic/2480-frame-question/#findComment-12480 Share on other sites More sharing options...
mudslut28 Posted May 31, 2007 Share Posted May 31, 2007 Well its a normal double frame truck but it is cracked on one side so both sides were plated about 3-4 feet long inside and out....thus the quad frame. Quote Link to comment https://www.bigmacktrucks.com/topic/2480-frame-question/#findComment-12484 Share on other sites More sharing options...
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