GMC Truck Forum banner

1 - 14 of 14 Posts

·
Registered
Joined
·
490 Posts
Discussion Starter #1
Recently lowered my 09 NNBS with 4 inch djm upper and lower arms in front, and in the rear I used a belltech flip kit at 7 inches, and kyb gas ajust shocks. The ride is horrible and the truck bottoms out a ton. Mostly the rear. What am I missing? Shock extenders?
 

·
Registered
Joined
·
490 Posts
Discussion Starter #4
I've been following you on ig.. trucks look good

You're gonna have to notch if you want a decent quality ride... 7" is pretty much as low as you can go without notching on these trucks. Also those kyb's are some of the stiffest shocks you can find. Look into street performance
I’d rather raise the back up to 6 with a shackle than to notch it, wonder if that would fix it
 

·
Verbal Assault Specialist
Joined
·
1,314 Posts
At a 7in drop in the rear your rear axle is most likely an inch or so from the frame. I was at 7in drop out back on my 2009 ext cab silverado for a long time, but I had assist bags for about 10 yrs. When I noticed the bags were dry rot I bought a new set of bags, but opted for lift shackles. Now the rear sits at a 5 in drop and I almost never bottom out without the assist bags.

Thinking about changing it to a 6in drop and putting the new assist bags in, but I haven't got around to it.

Of course the other option is to notch the frame.
 

·
Registered
Joined
·
221 Posts
Recently lowered my 09 NNBS with 4 inch djm upper and lower arms in front, and in the rear I used a belltech flip kit at 7 inches, and kyb gas ajust shocks. The ride is horrible and the truck bottoms out a ton. Mostly the rear. What am I missing? Shock extenders?
Three questions; Is the axle hitting the frame? Is the driveshaft bottoming out at the slip yoke? With a seven inch drop I would think you need to shorten the shaft or move the axle back an inch or so. Was this done?
 

·
New truck Same name
Joined
·
585 Posts
need to notch it, add helper bags, or raise it back up a inch or two. Like stated above you’ve only got a inch or so between the frame and axle so any little bump or road defect is gonna cause some hitting. Also like suggested belltech street performance shocks are some of the best for lowered vehicles and if you don’t have shock extenders I recommend adding those regardless. They will put your shocks at a better angle.
 

·
Registered
Joined
·
490 Posts
Discussion Starter #11
need to notch it, add helper bags, or raise it back up a inch or two. Like stated above you’ve only got a inch or so between the frame and axle so any little bump or road defect is gonna cause some hitting. Also like suggested belltech street performance shocks are some of the best for lowered vehicles and if you don’t have shock extenders I recommend adding those regardless. They will put your shocks at a better angle.
Probably will do the shock extenders and raise it to a 5 or maybe a 5.5
 

·
Registered
Joined
·
490 Posts
Discussion Starter #12
Has anyone done like a 4/5.. understand it would be higher in the rear but would still be low and less rake than stock
 

·
Verbal Assault Specialist
Joined
·
1,314 Posts
Has anyone done like a 4/5.. understand it would be higher in the rear but would still be low and less rake than stock
I'm at 4/5. Beltech drop spindles and struts. Flipkit and adjustable lift hangers out back. The hangers can be set at 1in or 2in lift. At a 1in lift (or 6in drop out back) I'll most likely need to install my assist bags.
 
1 - 14 of 14 Posts
Top