You're good!
Front Lower Control Arm Romoval/Replacement
- Thread starter davisfj62
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You're good!
I'm tackling this right now as well and its my understanding that you crank on the bolt and not the nut. As the nut has teeth to bite into the arm to keep it from loosening. I didnt see anything in the FSM on procedures. I'm assuming you have to take a ride height measurement for reference with the truck on the ground before you start taking things apart and torquing this rear bolt first/separately when reinstalling. At least this is what im going to do because i dont see another way.
shtbrwn86
SILVER Star
I wondered the same thing actually. I noticed those little teeth on the nut and I was also under the impression that the nut needed to stay stationary. I think I am going to torque everything but that rear bolt down down at ride height and then mark the control arm position, remove the torque arm housing and tighten the bolt. Seems like such a freaking bad design.
although if you look at those bolts new they have some kind of thread lock applied so maybe Toyota realized you can’t tighten the bolt down easily so they coated the bolts with thread lock?
It's a serrated flange nut. The bolt or nut may be turned. The serrations are directional and designed to resist rotation in the direction that would loosen the nut. It is perfectly fine to turn the nut if you desire. In fact... they are designed to mar/displace the base material they ride against.
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JunkCrzr89
Competent Ignoramoose
The Toyota nuts for the LCA are definitely serrated.
Doh! I meant to say directionally serrated. My mistake
I’m doing this right now. After reading the thread it dawned on me that I logged my ride height during AHC tuning. So I’m going to jack up the LCA until the center of the spindle is 535mm from my fender edge. No tension on TB, torque everything down.
Everyone’s going to have a slightly different nominal measurement. My notes say 500mm is stock and slee sets up 540 to 550mm.
Everyone’s going to have a slightly different nominal measurement. My notes say 500mm is stock and slee sets up 540 to 550mm.
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Also, I have a McMaster Carr parts list that worked perfectly to pop my #2 out in 5minutes. Acme rod plus perfectly sized washers. Will try to post it all up soon.
Somebodyelse5
16124-75030
This is the way
Somebodyelse5
16124-75030
ACME is specific thread profile that can handle a lot more load. It's still an "all thread"/"threaded rod" but it's a very specific type.
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
I have learned a new thing today! Thank you!ACME is specific thread profile that can handle a lot more load. It's still an "all thread"/"threaded rod" but it's a very specific type.
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.www.mcmaster.com
And to think it was just Roadrunner's go-to supplier...
Yep, acme threads are special load bearing threads.
The parts list below was paired with one of the larger cups from a ball joint press kit like this to receive the bushing.
Amazon product ASIN B01N7CO50EYou can also rent these kits.
Here's my order from McMaster-Carr:
www.mcmaster.com
Its a grade 7 screw, with 125,000psi tensile strength. I didn't run the numbers for what it can assert to the bushing ... but estimating it now to roughly 20,000lb breaking strength, assuming 1/2in diameter solid inside the threads. Cross-section area in inches * tensile strength in PSI ... YMMV, but my bushing popped out!
The parts list below was paired with one of the larger cups from a ball joint press kit like this to receive the bushing.
Amazon product ASIN B01N7CO50EYou can also rent these kits.
Here's my order from McMaster-Carr:
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
| Qty | Each | Description | PN | Extended |
| 2 | $3.68 | Carbon Steel Acme Hex Nut, Right Hand, 5/8"-8 Thread Size | 94815A108 | $7.36 |
| 1 | $21.24 | Alloy Steel Acme Lead Screw, Right Hand, 5/8"-8 Thread Size, 12" Long | 93410A932 | $21.24 |
| 1 | $4.62 | Black-Oxide Steel Oversized Washer for 7/8" Screw, 0.906" ID, 1.828" OD, 0.230"-0.255" Thick, Packs of 1 | 98029A056 | $4.62 |
| 2 | $2.6 | Black-Oxide Steel Oversized Washer for 5/8" Screw, 0.719" ID, 1.250 OD, 0.230"-0.255" Thick, Packs of 1 | 98029A053 | $5.2 |
| Total | $38.42 |
Its a grade 7 screw, with 125,000psi tensile strength. I didn't run the numbers for what it can assert to the bushing ... but estimating it now to roughly 20,000lb breaking strength, assuming 1/2in diameter solid inside the threads. Cross-section area in inches * tensile strength in PSI ... YMMV, but my bushing popped out!
shtbrwn86
SILVER Star
This will really help someone in the future! Me, I have PTSD from changing out all the control arms and specifically this bushing!Yep, acme threads are special load bearing threads.
The parts list below was paired with one of the larger cups from a ball joint press kit like this to receive the bushing.
Amazon product ASIN B01N7CO50EYou can also rent these kits.
View attachment 3423090
Here's my order from McMaster-Carr:
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
Qty Each Description PN Extended 2 $3.68 Carbon Steel Acme Hex Nut, Right Hand, 5/8"-8 Thread Size 94815A108 $7.36 1 $21.24 Alloy Steel Acme Lead Screw, Right Hand, 5/8"-8 Thread Size, 12" Long 93410A932 $21.24 1 $4.62 Black-Oxide Steel Oversized Washer for 7/8" Screw,
0.906" ID, 1.828" OD, 0.230"-0.255" Thick, Packs of 198029A056 $4.62 2 $2.6 Black-Oxide Steel Oversized Washer for 5/8" Screw,
0.719" ID, 1.250 OD, 0.230"-0.255" Thick, Packs of 198029A053 $5.2 Total $38.42
Its a grade 7 screw, with 125,000psi tensile strength. I didn't run the numbers for what it can assert to the bushing ... but estimating it now to roughly 20,000lb breaking strength, assuming 1/2in diameter solid inside the threads. Cross-section area in inches * tensile strength in PSI ... YMMV, but my bushing popped out!
View attachment 3423097View attachment 3423098
Yep, acme threads are special load bearing threads.
The parts list below was paired with one of the larger cups from a ball joint press kit like this to receive the bushing.
Amazon product ASIN B01N7CO50EYou can also rent these kits.
View attachment 3423090
Here's my order from McMaster-Carr:
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
Qty Each Description PN Extended 2 $3.68 Carbon Steel Acme Hex Nut, Right Hand, 5/8"-8 Thread Size 94815A108 $7.36 1 $21.24 Alloy Steel Acme Lead Screw, Right Hand, 5/8"-8 Thread Size, 12" Long 93410A932 $21.24 1 $4.62 Black-Oxide Steel Oversized Washer for 7/8" Screw,
0.906" ID, 1.828" OD, 0.230"-0.255" Thick, Packs of 198029A056 $4.62 2 $2.6 Black-Oxide Steel Oversized Washer for 5/8" Screw,
0.719" ID, 1.250 OD, 0.230"-0.255" Thick, Packs of 198029A053 $5.2 Total $38.42
Its a grade 7 screw, with 125,000psi tensile strength. I didn't run the numbers for what it can assert to the bushing ... but estimating it now to roughly 20,000lb breaking strength, assuming 1/2in diameter solid inside the threads. Cross-section area in inches * tensile strength in PSI ... YMMV, but my bushing popped out!
View attachment 3423097View attachment 3423098
Thanks a bunch!
Hey it's me from the future!
Just placed this exact order from mcmaster-carr and happy to report only $0.50 of inflation on the materials
. Sometimes I'll dig up an old thread for OEM parts and then quietly cry over the change in price over the years. I'll be replacing LCAs, bushing 2, and hopefully finding a way to slip in new lower shock bushings as well. Do they all need to be replaced? Maybe not... but the longer my southern rig lives up here in NY the harder it'll be to do these things myself.
they are not serrated nuts, but actual raised radial bars. the frame has receiving indentations...if you loosen the single nut, the bars become destroyed, and takes 10x the force.
Mc-Master Carr order worked great! I paired it w/ the rented #648617 ball joint press receiving cup from advance auto. The kit didn't haven't anything the correct OD to push bushing #2 out but it turns out that nipple for 2" OD galvanized pipe fits nice and snug just about the same size as the 1.828 OD washer. Pushed it right out - I just had to help it back out in the reverse direction with the washer.
Lower shock bolts were another story...
They we're so shot that the ram was actually making contact with the lower control arm. Excited to get back on the road once I figure out what madness I caused with my torsion bars. Thought my paint marks lined up but I have a ton of slack in the adjustment bolts even when my adjustment bolt threads reach their old position.
Lower shock bolts were another story...
They we're so shot that the ram was actually making contact with the lower control arm. Excited to get back on the road once I figure out what madness I caused with my torsion bars. Thought my paint marks lined up but I have a ton of slack in the adjustment bolts even when my adjustment bolt threads reach their old position.
