Tandem axle suspension ?'s - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > General Tech > General 4x4 Discussion
Notices

Reply
 
Share LinkBack Thread Tools Display Modes
Old 08-11-2006, 07:01 PM   #1 (permalink)
Registered User
 
Join Date: Aug 2003
Member # 21960
Location: Port Charlotte FL
Posts: 273
Send a message via AIM to Yankneck696
Tandem axle suspension ?'s

I am building a tandem suspension under a Sammi. I have all the parts here, now.
90 Samurai
81 Mercedes Diesel w/ auto trans (4 speed no OD)
90 Ford Probe 2.3 turbo
Toyota rear w/ tri 3 link ( center pumpkin )4.10
FJ axles front & rear ( passenger offset front & rear )4.10
stock sammi t-case
85 Nissan T-case ( divorced)
Volvo trans on the way monday ( M45 4 speed no OD box)

Power goes from 240D motor to mercedes trans, then Volvo M45, then to the sammi t-case.
Front drive shaft goes to front FJ axle that will be moved forward.
Q1. 3 link with panhard, I think. Do radius style arm on Diff side?

Here's where it gets funky... Tandem rears from here on in.

Rear output of Sammi t-case to output of Nissan t-case ( reversed & flipped )
Origional Nissan input flange goes to first rear axle ( FJ passenger pumpkin )
Origional nissan front output flange ( clocked up & center) goes to center pumpkin diff in second rear position.
I already have a triangulated upper wishbone for the upper rear rear with straight lowers. Worked well in a LS1 powered toy for a few years. AI am going to run from the nissan t-case origional front output ( clocked center & up to a carrier bearing, then down thru a CV to clear the front rear axle. )

Now comes the Front rear axle.
It's the rear FJ axle that has the pass diff. I will run a CV off of the origional nissan t-case input to the front rear. ( able to be deselected by transfer case )

Q2. What would you use? a matching triangulated 3 link for it? Three link with panhard bar would shift the shift back & forth. Just wondering about driveshaft angles.

Q3. If the same suspension on both rears, would you do different antisquat & other variables, or just run them the same?

Rules:
1: Daily driver ( on used veggie oil )
2: No rock climbing
3: Competent trail rig
4: Fun mud runs
5: WTF Factor
6: Buildable from the junk yard I wirk at here in Hot Sweaty Humid Florida.
7: Minor machining for couplers
8:33-35" tires. Street will be 33's. Trail or mud will be 31, 33, 35 Bobcat tires.
What would you do?
Laugh all ya want, but it'll be done in a month or so.
__________________
Yankneck: Yankee inginuity + Redneck stupidity...
"How can I break it better?"
Yankneck696 is offline   Reply With Quote Quick reply to this message
Old 08-11-2006, 07:21 PM   #2 (permalink)
Pirate4x4 Addict!
 
45acp's Avatar
 
Join Date: Sep 2002
Member # 13671
Location: Texarkana
Posts: 13,304
Y not do leaves? Departure angle isnt going to be that big of a deal w/2 rears and its not going to be a rock rig anyway.
45acp is online now   Reply With Quote Quick reply to this message
Sponsored Links
Old 08-11-2006, 07:31 PM   #3 (permalink)
Registered User
 
Join Date: Aug 2003
Member # 21960
Location: Port Charlotte FL
Posts: 273
Send a message via AIM to Yankneck696
When you say leaves, you mean the front rear? I already have everything for the rear rear. I think it's too cheesy to go link & leaf. A maybe, though with light progressive springs. Can't beat simple.
Thanx
__________________
Yankneck: Yankee inginuity + Redneck stupidity...
"How can I break it better?"
Yankneck696 is offline   Reply With Quote Quick reply to this message
 
Old 08-12-2006, 05:42 AM   #4 (permalink)
Registered User
 
Join Date: Aug 2003
Member # 21960
Location: Port Charlotte FL
Posts: 273
Send a message via AIM to Yankneck696
Anyone else? At least thought I'd get laughed at....
__________________
Yankneck: Yankee inginuity + Redneck stupidity...
"How can I break it better?"
Yankneck696 is offline   Reply With Quote Quick reply to this message
Old 08-12-2006, 09:16 AM   #5 (permalink)
 
Join Date: Jan 2005
Member # 40872
Posts: 127
As for the front do what ever you want, as for the rear you have some choices one was the has beed done befor and works good is to build a wlking beam set up with leafs in the rear, you could do matching link setup on bothe axles( 3link , 4 link) If you wanted to be diff you could probly do a forward forlink on the front axle and a reverse four link on the rear. or you could set up both axles with leaf springs an have a floting center hanger kind of like how trailers are set up.

hope this gives you some ideals. If you need any thing expaned better just ask.

ECG

O ya btw what Yard do you work at?

Last edited by East Coast Ghost; 08-12-2006 at 09:17 AM.
East Coast Ghost is offline   Reply With Quote Quick reply to this message
Old 08-12-2006, 09:37 AM   #6 (permalink)
Registered User
 
Join Date: Oct 2000
Member # 1889
Location: Firestone, Colorado, USA
Posts: 11,457
Got the WTF factor down.

Depending on the wheelbase, you'll likely want to be able to cutting-brake-turn this thing if you want it to maneuver at all. I see no mention of lockers, so if you're running open diffs in all three, I'd recommend at least looking into a cutting brake that'll let you drag both left rears, or both right rears, so that you can make it steer. Otherwise, you'll be able to steer the front wheels all you want, and have it just plow straight ahead, particularly if it's built remotely close to Samurai dimensions.

As for rear suspensions, I think I'd build matching link suspensions for both rears, same antisquat, same roll axis, same same everything. Then airbag the rear, and tie the front left bag to the rear left bag, and the front right to the rear right, so that you get some stability (lefts aren't tied to rights) but some degree of "forced articulation" with relatively free movement of one rear relative to the other as you bump over stuff on the trail.

For as light as this thing is going to be, you could probably hillbilly-bag the rear using the air-adjust shocks (might have to do two or four per corner, but hey, you work at a yard, and there's gotta be a bazillion of 'em out there) off an early 80's GM car.
Scott@Rockstomper is offline   Reply With Quote Quick reply to this message
Old 08-13-2006, 04:08 AM   #7 (permalink)
Registered User
 
Join Date: Aug 2003
Member # 21960
Location: Port Charlotte FL
Posts: 273
Send a message via AIM to Yankneck696
East Coast Ghost.. I work at Classic Auto Salvage in melbouring.

I think I'll match both rears with tri-3 links.
I like the idea of crossing the air bags... Pretty cool...

Got to love working in a Junk yard... ;-)

Thanx
Ed
__________________
Yankneck: Yankee inginuity + Redneck stupidity...
"How can I break it better?"
Yankneck696 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 01:14 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.