somebody knows the function of this?

[yukonrrican]

Hi to all. After an abusive offroad day, my Yukon GT broke a tie rod in the field and start to vibrate a lot. After some TLC, I install a new gear box, pitman, idler arm and idler arm bracket, but still shaking a lot after 40 MPH. During the "fix" I found that one of the 2 bars welded from the chassis (driver side bar near gear box) to the crossmember under the radiator was broken.




This could be the root cause of the vibration?
What is the function of this bar?
Support to the gear box frame?

 

[SunlitComet]

mainly to reduce torsion stress on the members and keep them aligned properly. that one i believe is the engine stress reliever. there are a few.

 

[bowtiefreak]

The vibration could be something as simple as the balance of the tires.

 

[OR VietVet]

Hi to all. After an abusive offroad day, my Yukon GT broke a tie rod in the field and start to vibrate a lot. After some TLC, I install a new gear box, pitman, idler arm and idler arm bracket, but still shaking a lot after 40 MPH. During the "fix" I found that one of the 2 bars welded from the chassis (driver side bar near gear box) to the crossmember under the radiator was broken.




This could be the root cause of the vibration?
What is the function of this bar?
Support to the gear box frame?

Sorry, but no where in you post of what you replaced do you mention the "tie rod" that you said you broke. What am I missing besides you likely misnaming a component?





Did you get it realigned? Something still bent? When you break something then sometimes you bend something?

 

[yukonrrican]

Sorry for the missing data. Yes, I install all the mentioned component and inner and outer (right and left) tie rods (all MOOG). After that it was aligned but still vibrating. A friend of mine indicate its got to be a bent axle shaft (front right).

Can I run the Yukon without the right axle shaft to verify?

Any way to test if its bent?

 

[yukonrrican]

Test a new front axle shaft and still.. I'm planning to burn it.

 

[SunlitComet]

NEVER put weight on the front wheels of a 4wd without the axleshaft installed.

---------- Post added at 09:29 AM ---------- Previous post was at 09:28 AM ----------

get it on a rack and start wiggling parts to check for loose stuff.

 

[yukonrrican]

Thanks for the comment SunlitComet. Thanks God I didn't do it. I install a new axle shaft and still wobbling at ~50mph. Lift each corner to verify if the tire/rims are bent but all 4 are OK.

New components:
New steering box, pitman, idler arm bracket, idler arm, inner and outer tie rods, shocks, steering damper.

Really don't know what to do.

re-balance the tires?

re-alignment?

sale the *****?