Quick LCA question - Pirate4x4.Com : 4x4 and Off-Road Forum

Ron4x4 · 04-08-2005, 11:54 AM

I have read and read and read about building LCA's, but still have one question. Is 2 inch OD 3/8 wall DOM strong enough to last a while in the front of a 90XJ with a waggy D44. And is a 1 inch 1-14 thread grade 8 going to hold up also?
The plan is to cut the head of the bolt off and press it into the 1.25 OD DOM drill and weld it in then press that into the 2"OD drill well and then weld around the end. On the short end I am going to turn some grade 8 coupling nuts down on the lathe to fit in the 2"od DOM and then drill and weld the nut into the tube. RE super flex at the frame and RE super ride at the axle.
Does it sound like it will be enough to hold up to landing on rocks?

P&T Jeeps · 04-08-2005, 01:08 PM

regarding the 2" .375 wall DOM; yes, it'll hold up. as far as the threaded portion goes, I'm not a big fan of it but I won't discount it to not work. I'm sure someone else will chime in to give you their thoughts....

Ron4x4 · 04-08-2005, 04:08 PM

Here is the idea, It may sound stupid to ask this question, but I want to confirm or deny my thoughts on this. Thanks
Ron

chris demartini · 04-08-2005, 04:28 PM

whats the threaded section for?

Ron4x4 · 04-08-2005, 04:35 PM

Quote:

Originally Posted by chris demartini

whats the threaded section for?

It is the bolt that threads into the nut on the shourt end of the control arm.

chris demartini · 04-08-2005, 04:41 PM

I meant why not just run the link one peice?

hotwheelsYJ · 04-08-2005, 04:48 PM

The 2" won't matter since your LCA will only be as strong as the 1" bolt(just over .875 )
On the other hand people use 3/4 heims all the time, but they are not in the middle of the link.( more leverage )
I would put the threaded end as close as possible to one end or the other

rok-jeep · 04-08-2005, 08:09 PM

Yeah just measure twice and cut once and make them one piece. The design looks good but if you get it right the first time then there is no need for adjustment. I was all worried that I would need adjustment on my four link rear but decided not too, its cheaper and less work not to. Get pinion angle set and make one piece, non-adjustable links.

Ron4x4 · 04-08-2005, 08:14 PM

The threaded end will be 2inches from the joint as close as possible to the joint. The main reason for going so with the strong tubing is more for impact than the pulling. I am thinking that the bolt being real close to the joint it will not see as much impact as the tubing. I am having a hell of a time finding a 1.25 grade 8 with 12tpi, here in Sac. I do have access to a good lathe would drill stock be stronger than grade 8?

P&T Jeeps · 04-09-2005, 06:53 AM

as asked above, why do you need it adjustable? if it's for pinion angle just make the uppers adjustable. if it's for setting the axle in place you need to get better w/ the tape measure.

seriously, it'll likely be more trouble than it's worth, go solid & forget about it....

Ron4x4 · 04-09-2005, 11:36 AM

Ya know, you guys just might be right. I have been wanting to make them adjustable so if I decide to change the lift height I can adjust it and keep the axle placement where I want it. But if I place everything first and locate the axle where I want it there will be no need to adjust it, I think.

04-08-2005, 11:54 AM	#1 (permalink)
Ron4x4 Registered User Join Date: May 2004 Member # 30439 Location: Reno, Nevada Posts: 114	Quick LCA question I have read and read and read about building LCA's, but still have one question. Is 2 inch OD 3/8 wall DOM strong enough to last a while in the front of a 90XJ with a waggy D44. And is a 1 inch 1-14 thread grade 8 going to hold up also? The plan is to cut the head of the bolt off and press it into the 1.25 OD DOM drill and weld it in then press that into the 2"OD drill well and then weld around the end. On the short end I am going to turn some grade 8 coupling nuts down on the lathe to fit in the 2"od DOM and then drill and weld the nut into the tube. RE super flex at the frame and RE super ride at the axle. Does it sound like it will be enough to hold up to landing on rocks? __________________ 2001 WJ Limited, 6.5 IronRock springs with Clayton Hard Arms, 1 tons and 37' rockers waiting.

04-08-2005, 01:08 PM	#2 (permalink)
P&T Jeeps Granite Guru Join Date: Mar 2001 Member # 3916 Location: south Posts: 2,826	regarding the 2" .375 wall DOM; yes, it'll hold up. as far as the threaded portion goes, I'm not a big fan of it but I won't discount it to not work. I'm sure someone else will chime in to give you their thoughts.... __________________ TJ; ARB'd & ChroMo'd 1-tons; 42" IROK's; Atlas 4.3; 4-linked, 106" WB... The Build

04-08-2005, 04:08 PM	#3 (permalink)
Ron4x4 Registered User Join Date: May 2004 Member # 30439 Location: Reno, Nevada Posts: 114	Picture of what I am talking about Here is the idea, It may sound stupid to ask this question, but I want to confirm or deny my thoughts on this. Thanks Ron __________________ 2001 WJ Limited, 6.5 IronRock springs with Clayton Hard Arms, 1 tons and 37' rockers waiting.

04-08-2005, 04:48 PM	#7 (permalink)
hotwheelsYJ Rock God Join Date: Jun 2004 Member # 32401 Location: Cleveland TN Posts: 1,077	The 2" won't matter since your LCA will only be as strong as the 1" bolt(just over .875 ) On the other hand people use 3/4 heims all the time, but they are not in the middle of the link.( more leverage ) I would put the threaded end as close as possible to one end or the other __________________ www.WILSONPERFORMANCE.com

04-08-2005, 08:09 PM	#8 (permalink)
rok-jeep Gravo Malum!!! Join Date: Jan 2003 Member # 16548 Location: Minden, Nv Posts: 1,613	Yeah just measure twice and cut once and make them one piece. The design looks good but if you get it right the first time then there is no need for adjustment. I was all worried that I would need adjustment on my four link rear but decided not too, its cheaper and less work not to. Get pinion angle set and make one piece, non-adjustable links. __________________ 98' XJuggy

04-08-2005, 04:28 PM	#4 (permalink)
chris demartini Registered User Join Date: Sep 2000 Member # 1636 Location: 201 NJ Posts: 5,737	whats the threaded section for?

04-08-2005, 04:41 PM	#6 (permalink)
chris demartini Registered User Join Date: Sep 2000 Member # 1636 Location: 201 NJ Posts: 5,737	I meant why not just run the link one peice?

04-08-2005, 08:14 PM	#9 (permalink)
Ron4x4 Registered User Join Date: May 2004 Member # 30439 Location: Reno, Nevada Posts: 114	The threaded end will be 2inches from the joint as close as possible to the joint. The main reason for going so with the strong tubing is more for impact than the pulling. I am thinking that the bolt being real close to the joint it will not see as much impact as the tubing. I am having a hell of a time finding a 1.25 grade 8 with 12tpi, here in Sac. I do have access to a good lathe would drill stock be stronger than grade 8? __________________ 2001 WJ Limited, 6.5 IronRock springs with Clayton Hard Arms, 1 tons and 37' rockers waiting.

04-09-2005, 06:53 AM	#10 (permalink)
P&T Jeeps Granite Guru Join Date: Mar 2001 Member # 3916 Location: south Posts: 2,826	as asked above, why do you need it adjustable? if it's for pinion angle just make the uppers adjustable. if it's for setting the axle in place you need to get better w/ the tape measure. seriously, it'll likely be more trouble than it's worth, go solid & forget about it.... __________________ TJ; ARB'd & ChroMo'd 1-tons; 42" IROK's; Atlas 4.3; 4-linked, 106" WB... The Build

04-09-2005, 11:36 AM	#11 (permalink)
Ron4x4 Registered User Join Date: May 2004 Member # 30439 Location: Reno, Nevada Posts: 114	Ya know, you guys just might be right. I have been wanting to make them adjustable so if I decide to change the lift height I can adjust it and keep the axle placement where I want it. But if I place everything first and locate the axle where I want it there will be no need to adjust it, I think. __________________ 2001 WJ Limited, 6.5 IronRock springs with Clayton Hard Arms, 1 tons and 37' rockers waiting.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode