Aluminum / XFE NNBS Front Suspension Rebuild

[mikez71]

Which lower is that?

I thought all lower arms fit all knuckles?

 

[TwistedQJ]

Mevotech CTXMS501184. It’s their aluminum arm with the TTX ball joint. Part number states it fits 14-18 Silverado/Sierras, 15-20 Yukon/tahoe/Esky.

 

[mikez71]

Looking at Marky D's post...looks like you may need the steel lower arms (If you go 14-18 parts)

I have been wondering if a complete later model swap will work (knuckles/arms/tie rod ends)

 

[petethepug]

Is there a part # on the LCA?

# 25788111 shows it fits all 07-14 full size SUV here …

2007-2014 GM Front Passenger Side Lower Control Arm 25997510 | NewGMParts.com

Get a Front Passenger Side Lower Control Arm Part # 25997510 for your GM automobile.You get parts that fit, guaranteed wholesale prices, worldwide shipping and courteous service at NewGMParts.com.

www.newgmparts.com

Reverse checking 2011 Silverado Alum LCA comes back to Mevotech# CMS501003 or vs # CTXMS501184 this …

More Information for MEVOTECH CMS501003

Does GM have another trick up their sleeve for an aluminum LCA / knuckle combo with a different diameter & pitch for 15-20 trucks?

Here’s Mevotech catalog for a 2010 Tahoe 4WD LT … adjust as needed …

Parts results - Mevotech

Page content

www.mevotech.com

 

[TwistedQJ]

I wonder if I can just replace the ball joints with ones for “Steel arms”.

 

[petethepug]

No you can not just for the sole reason that would be entirely too easy compared to all the other hoops GM is making us jump through.

Moog (Mevotech) has an online Q&A section on their parts compatibility catalog. It’s usually a 24 hr turn around time when respond back.

If you do inquire be sure to include their part #’s and specifically ask if the ball joints between part #ABC and #123 are cross compatible.

If they’re not, what parts are for my 69 Camaro kinda language or you’ll get … sorry, need more info

 

[91RS]

I’m not sure if I missed it but did you get this done? What changes did you notice while driving? Does it help with the shudder/hammer feel when hitting a sharp bump that these trucks have? Especially with the 22”?

 

[petethepug]

Found the photo …

I was looking for the photo someone posted of their NNBS truck that was factory with aluminum UCA & LCA but couldn’t find it.

 

[petethepug]

Timeline is this month. Fingers crossed. The Indi will be doing the radiator, CPS along with the rack and (another) oil pressure sensor.

It’s a huugge pile of parts. Very thankful to be doing this resto on vehicle I hunted down and have 150%, no regrets about restoring vs. a dump & run to a newer vehicle.

I’m not sure if I missed it but did you get this done?

 

[91RS]

I ended up buying the aluminum lower control arms made for the GMT-900, new front shocks, new front strut mounts, and the gel filled steering gear bushings made to help with vibration on the K2 trucks. I wanted to do the full aluminum conversion, but my truck is lowered with drop knuckles. All of those are iron, so I would have had to raise the truck back up to go with the stock aluminum knuckles or there was no point. The difference in weight for the stock iron upper control arms and the stamped steel wasn’t much but the lower arms was over 5 lbs. I haven’t been on a trip again yet, but all the parts I replaced seemed to make a big difference. Although the Mag ride shocks aren’t “supposed” to wear out because of how they work, and mine showed zero signs of leakage,
I figured there was absolutely no way they still worked like when they were new with 193k on them. I did the strut mounts while I was there because that’s one of the few pieces that also hadn’t been replaced. I’m actually also thinking about looking for another set of the Escalade V forged wheels for this truck because I know those weigh less than the wheels on it. I hate to have the same wheels on both trucks but they do look great.