Chevy and GMC Duramax Diesel Forum

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capt 09-07-2019 04:30 PM

Torsion keys
I rebuilt my front end new control arms upper and lower and now I cant get my front end to come back up do I need new keys

wade_660 09-07-2019 10:31 PM

Probably need new bars

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capt 09-08-2019 09:29 AM

Why is that are you suppose to change bars out they dont have much play in them

DailyDmax 09-08-2019 07:39 PM

Is the lower control arm keyed correct to the torsion bar? It could be in the wrong position when replacing lower control arm. The keys can't wear out.

LikeABoss 09-09-2019 11:30 AM

I would agree. They can slowly sag with time but if this was a sudden change, they werenít reinstalled with enough preload so you canít twist them enough with the torsion bolts/keys to get your ride height back.

capt 09-10-2019 12:28 PM

I put new keys in and didnt help I can get the passenger side up but not the driver side it was a sudden change I had 35 on my truck with no issue but sence the rebuild I cant get it level

DailyDmax 09-10-2019 01:49 PM

As in issue after rebuild? What was rebuilt? Control Arms removed?

capt 09-11-2019 05:47 AM

Yes control arms were removed and new ones were put on

capt 09-11-2019 12:55 PM

New upper and lower control arms

DailyDmax 09-11-2019 02:19 PM

So the torsion bar is key to the lower control arm. It should be keyed in a way that when the suspension is fully unloaded it still had load on the bar. If this is keyed back into the control arm incorrectly, it wont have this preload anymore.

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