bent sub frame but where?

[Mills]

The front sub frame on my '08 Nytro is bent because the shocks no longer sit centered on the upper a-arm. The left one is about a 1/4" from the rear a-arm tube and the right one is about 3/8" - 1/2" from the rear tube on the a-arm. i am going to replace the subframe and have found a couple of used ones that people are telling me are straight. What I don't know is where these sub frames typically bend. I would like to know so that I can check out any used one that I may potentially buy. Whether I get a used on or new one, the Grizztracks gussets are going to be put in what ever I get!!!!

 

[toyota4runner]

I'm pretty sure Grizz will sell you a straight frame with gussets already welded in for a good price and take the bent one off your hands. Send him a pm and ask

 

[grizztracks]

It can be difficult to see if the frame is bent without a-arms installed. It's normally at the a-arm mounts or at the rivet holes in the lower portion of the frame tubing. The a-arm mounting holes also may be egged out which can be repaired fairly easily.

This is a 08 subframe that twisted the frame tubing. looking down at it you can see it's no longer square:



This is a 09 frame that buckled the center gusset, bent the lower mounting tower and egged the holes. I repaired and reinforced this frame:




I also weld the lower a-arm nuts to the subframe to prevent the holes from egging again:

 

[newfie09xtx]

Grizztracks- Should the frame be straightened while bolted on the sled or off?

 

[grizztracks]

unless you have a good way to anchor the frame it's easier to straighten it while still installed. If it's a newer frame with the center gusset that buckles when the frame is bent then cut the gusset out before attempting to straighten it.

 

[newfie09xtx]

Mine is buckled where the center gusset (circle) is. I haven't pulled it apart yet but do you think that is the only place it is bent? Would it still be bent on the a-arm mounts? Do you need torches (heat) to straighten it out?

Sorry about all the questions. Thanks for all your help.

 

[grizztracks]

Normally a small amount of damage can be corrected using a pry bar between the a-arms. Usually the shocks are slightly to the rear of center in the upper a-arm and both sides should be equally spaced.

Grizz Photobucket page