Decembersend said:
Well I do have an aftermarket bumper from Mike (BartonMD). When I tried to use the jack on it it leaned towards the truck almost cracking my headlights with the brush guard. As for rock sliders I may have to order some from Mike.
Hmmm... Kyle and I jack by my regular and 3" BL bumpers pretty frequently, with no issues. The frame up there does flex up a little bit, but not enough to jam anything into anything else. Maybe 3/8" or so. Does it whether I jack on the shackle mount, or under the bumper at the frame, so I know it's mostly the frame flexing.
It does cross my mind that you ground off both upper and lower frame tube ends, instead of just the top one like I told you. I told you how to use (2) 1/2" or 5/8" fender washers under the bottom part to fix it. Have you done that, yet? Without doing that, like I said, the bumper sits up higher than I had planned by about 1/4". Your actual bumper should be stronger lifting than the normal ones, because while it does have a larger moment than the regular (non-winch) bumpers, I put bridge pieces between the upper and lower mounts, so they wouldn't flex much. Like I say, though, you've got almost double the moment on the frame that my normal bumpers have, sticking out so far because of the winch mount, that it could just be that it's flexing the frame more than the standard ones do.
How far are the tubes away from the headlights, normally? I was thinking they were like 2+" away.
Did the bumper lean back and come back to normal when you took the jack off of it, or did it stay rotated back/up?
You're using the stock bolts, torqued to 100+ ft-lbs, right?
Mike
ETA: Looking at the pictures I have, I guess yours are closer to the lights than the regular bumper tubes, since they hit the top of the bumper, instead of the sides. With the mechanical relationship (small movement = large movement at the end of an arm), I could see them hitting the headlights, I guess... The other thing I happened to think of is that I've never seen one of my bumpers jacked on without a radiator skid. I'm certain that the radiator skid minimizes the frame flex, as it makes it sort of a "box" sticking out, from the IFS subframe, rather than just a couple frame rails.
Either way, I don't like jacking from the bumper. I've had the whole vehicle rock sideways off the jack, when I've done that with my truck. I find it MUCH more stable to jack from the sliders or with the wheel strap attachment.