Aluminum lower control arm, should we be concerned?

OP
SliderJack

SliderJack

First Edition
Well-Known Member
First Name
Jack
Joined
Mar 18, 2020
Messages
204
Reaction score
463
Location
TN USA
Vehicle(s)
FJ Cruiser, FJ40, SLK300, Viper
Clubs
 
  • Thread starter
  • Thread Starter
  • #32
I'd really like to see a photo of underside those Moab/Johnson Valley test mules. Here's the closest I have to the above photo from a Jeep. You can see the axle and lower control arm suffer from a lot of rock rash. I'd expect the same on those test rigs. The cool thing is no rust, in the LCAs, but I would be nice to see if they get gouged out really deep or not.

MotorHomeDamage20100213_15_34_10.jpg
Yeah, I'd like to see the Rubicon rigs. But they also had the benefit of pro spotters.

Regardless, its all academic. Something to chat about. It doesnt really matter.
 

mdonathan56

Black Diamond
Well-Known Member
First Name
Michael
Joined
Jul 27, 2020
Messages
197
Reaction score
239
Location
Florida
Vehicle(s)
2016 Q5 TDI, 2015 A6 TDI, 1997 F250 Powerstroke
Clubs
 
Aluminum alloy and forged, most likely.
Hopefully forged. It could be a cast piece or today even Additive Manufacturing. Aluminum itself is not a problem; it's how it is manufactured.
 

WkndEpic

Badlands
Member
First Name
John
Joined
Jun 19, 2020
Messages
21
Reaction score
22
Location
Colorado
Vehicle(s)
Tacoma
I’ll get skids once someone makes them.

6F56CE4B-9D89-4D81-9272-6D37AF2281D1.jpeg
I have the RCI sliders and skid plate on my 3rd gen Taco and they are great! Hopefully, they'll offer armor for the Bronco when it's released.
 

Bison

Badlands
Well-Known Member
First Name
Matt
Joined
Jul 24, 2020
Messages
199
Reaction score
344
Location
Colorado
Vehicle(s)
Fj cruiser, Power wagon
They showed up later in the game for me. I already had bud built’s full skids.
 

Felix808

Badlands
Well-Known Member
Joined
Jul 19, 2020
Messages
308
Reaction score
550
Location
SRV CA
Vehicle(s)
waiting for 4door Badlands Bronco
Clubs
 
OMG! Please stop!
Aluminum suspension bits means less un-sprung weight and thus means a much more responsive suspension overall. It is a major upgrade and I am shocked Ford is doing aluminum on the Bronco
Finally someone said it. it might incur a few gouges along the way but will be plenty strong & as mentioned more responsive.
 

dcorn

New Member
First Name
Dale
Joined
Sep 3, 2020
Messages
4
Reaction score
3
Location
VA
Vehicle(s)
Jeep WK2
I'm not worried about the Al LCA at all. I'm just mystified why they put an exposed nut and bolt hanging down below it. It'll be a fairly unlikely spot to hit with a rock since it's so close to the tire, but just a few rubs on that bolt and you're taking your shocks off with a grinder instead of a wrench. I would bet one of the very first mods for most offroaders will be some sort of stud kit or skid for the lower shock mount.
 

BAUS67

Base
Well-Known Member
First Name
redneck
Joined
Jan 3, 2020
Messages
1,499
Reaction score
2,622
Location
Central PA
Vehicle(s)
88 5.0 LX, 08 F-150 Stepside, 13 Explorer XLT, 97 Jeep Wrangler
I'm not worried about the Al LCA at all. I'm just mystified why they put an exposed nut and bolt hanging down below it. It'll be a fairly unlikely spot to hit with a rock since it's so close to the tire, but just a few rubs on that bolt and you're taking your shocks off with a grinder instead of a wrench. I would bet one of the very first mods for most offroaders will be some sort of stud kit or skid for the lower shock mount.
My thoughts exactly !!!! look at the pic below of the Warthog suspension I enlarged you can see the lower control arm has the bolt for the lower coil over mount going horizonal through the control arm. :unsure: Had some second thoughts about those bolts sticking down to get smashed to the point of being unremovable ??? Why would they not do this from the start?????

My first thought was some kind of plate with two studs welded to it to go up through the lower control arm so they don't get smashed sticking down.

warthog close up.jpeg
 

L8apex

Black Diamond
Well-Known Member
First Name
Greg
Joined
Jul 14, 2020
Messages
185
Reaction score
611
Location
NC
Vehicle(s)
'14 Focus ST
I have learned to trust aluminum and the weight savings are great. However I do not like seeing another bolt sticking out that far (not as bad as the rear though) as that is just asking to get caught on a rock and cause damage... but again, pre-production, shouldn't worry... right?
Engineering rule of thumb is three exposed threads once at torque. This looks pretty close to that, and for assembly it has the tapered pilot which probably isn’t going away - I wouldn’t get your hopes up.
 

BAUS67

Base
Well-Known Member
First Name
redneck
Joined
Jan 3, 2020
Messages
1,499
Reaction score
2,622
Location
Central PA
Vehicle(s)
88 5.0 LX, 08 F-150 Stepside, 13 Explorer XLT, 97 Jeep Wrangler
Why not just put that weight in the part being protected and make it out of something durable enough to not need the skid in the first place?

Amen Brother !!!!! Should just be made like this !!!! That's what happens when computer geeks build stuff instead of off-roaders !!! :ROFLMAO:

1600814339516.png
 

BAUS67

Base
Well-Known Member
First Name
redneck
Joined
Jan 3, 2020
Messages
1,499
Reaction score
2,622
Location
Central PA
Vehicle(s)
88 5.0 LX, 08 F-150 Stepside, 13 Explorer XLT, 97 Jeep Wrangler
Engineering rule of thumb is three exposed threads once at torque. This looks pretty close to that, and for assembly it has the tapered pilot which probably isn’t going away - I wouldn’t get your hopes up.

I believe the NHRA safety rules are the stud must protrude past the nut equal to the diameter of the stud. i.e. 1/2 " stud has to protrude a 1/2 " from the nut.
 

Hoofnmouth

Base
Well-Known Member
First Name
mark
Joined
Jul 10, 2020
Messages
426
Reaction score
724
Location
N ca
Vehicle(s)
ford focus st
Clubs
 
I'm not talking about regular road usage. Im talking about using this as an off-road rig, hitting rocks. Thats why I said vulnerable.

I'm sure it will be more than fine for 99.9% of the mall crawlers.

I dont land, flaps down, in dry river beds covered in rocks. Do you?
Yup always lifted flaps when landing on runways made of seashells in the bahamas.
 

L8apex

Black Diamond
Well-Known Member
First Name
Greg
Joined
Jul 14, 2020
Messages
185
Reaction score
611
Location
NC
Vehicle(s)
'14 Focus ST
I believe the NHRA safety rules are the stud must protrude past the nut equal to the diameter of the stud. i.e. 1/2 " stud has to protrude a 1/2 " from the nut.
From what I can see the only thing mentioned is thread engagement for wheel studs. Where the the thread engagement must be equal or greater than the diameter. I had to check because 6.5 (1/2" length) exposed threads on a 1/2" stud would be ridiculous.

From the 2020 rules.

The thread engagement on all wheel studs to the lug nut, or lug bolts to wheel hubs, must be equivalent to or greater than the diameter of the stud/bolt. Length of the stud/bolt does not determine permissibility. (Example: A 7/16-inch stud must be thoroughly engaged through the threads in the hex portion of the lug a minimum of 7/16-inch.) Wheel spacer permitted.​
 

Advertisement





 


Advertisement
Top