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ADD front end swap #914919 11/08/08 09:52 PM
Joined: Apr 2001
Posts: 53
T
Toy529 Offline OP
Getting the Wheeling Fever
CAn you swap a ADD unit for a regular axle tube axle and tube? I have manual hubs. I thought I say a post for it before but can not find it.


84 4-runner 529 & Locked
86 4-runner
From the Off-Road World
Re: ADD front end swap [Re: Toy529] #914920 11/08/08 10:56 PM
Joined: Jan 2001
Posts: 11,595
Adam F Offline
Forum Moderator
Not sure on that, but are you just trying to elimate the ADD? Here's another option that you can do for free

http://www.4x4wire.com/toyota/tech/add/


88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Re: ADD front end swap [Re: Toy529] #914921 11/09/08 05:07 AM
Joined: Apr 2000
Posts: 4,230
OOP'S Offline
Roll Me Over
Quote
CAn you swap a ADD unit for a regular axle tube axle and tube? I have manual hubs. I thought I say a post for it before but can not find it.
Yes, do not forget to plug off the vacuum lines.


David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA

"Serenity through Sobriety"
Re: ADD front end swap [Re: Toy529] #914922 11/10/08 01:49 PM
Joined: Jan 2000
Posts: 454
Toy4x Offline
Mudrunner
I did it and the swop makes for a clean & sound system.
However if I had to do it over again, i'd look hard at a full time locker option, and a switch to turn the actuator/shaft on / off. Would make it the operate like an elec / arb.

Last edited by Toy4x; 11/10/08 08:18 PM.
Re: ADD front end swap [Re: Toy4x] #914923 11/10/08 05:23 PM
Joined: Apr 2000
Posts: 4,230
OOP'S Offline
Roll Me Over
Quote
I did it and the swop makes for a clean & sound system.
However if I had to do it over again, i'd look hard at a full time locker option and a switch to turn it on / off. Would make it the operate like an elec / arb.
That would not make it a locker; it would still work on the Differential action of one or the other wheel driving. Unless it has an LSD or locker, the wheel with the least traction will spin. A four wheel drive without lockers or LSD is actually only two wheel drive, one in front one in back hence the reason for LSDs, lockers, spools, or welded.


David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA

"Serenity through Sobriety"
Re: ADD front end swap [Re: Toy529] #914924 11/10/08 07:31 PM
Joined: Nov 2000
Posts: 301
P
Pyroboy Offline
Mudrunner
Yes, just did one a few weeks ago. You will need to get a seal for the centre section where the non-ADD tube bolts on. You will also need a slide hammer to pull the axle out of the centre section as there is a spring-type ring in a groove in the axle that mates with a groove in the diff.


1989 4Runner Special Edition
22RE, 5-spd.
TG 3" SAS, MC DuaLs, 4.56s, Air Locker
Hi-Clearance panels by
www.toyotafiberglass.com
Re: ADD front end swap [Re: OOP'S] #914925 11/10/08 08:25 PM
Joined: Jan 2000
Posts: 454
Toy4x Offline
Mudrunner
my comment was based on upgrading the differential.

Re: ADD front end swap [Re: Toy4x] #914926 11/10/08 08:36 PM
Joined: Nov 2000
Posts: 301
P
Pyroboy Offline
Mudrunner
Does the ADD introduce any mechanical weakness to the axle that is not there in a non-ADD axle? I was not thinking of actuators, vacuum lines, etc., just the actual drive system.


1989 4Runner Special Edition
22RE, 5-spd.
TG 3" SAS, MC DuaLs, 4.56s, Air Locker
Hi-Clearance panels by
www.toyotafiberglass.com
Re: ADD front end swap [Re: Pyroboy] #914927 11/10/08 09:03 PM
Joined: Mar 2004
Posts: 514
grandeyota Offline
Rock Warrior
Quote
Does the ADD introduce any mechanical weakness to the axle that is not there in a non-ADD axle? I was not thinking of actuators, vacuum lines, etc., just the actual drive system.

When I had mine apart, the ADD shaft was smaller than the non-ADD unit. I'm thinking the non-add is the stronger setup of the two.


Fur clog in the sausage grinder
Re: ADD front end swap [Re: grandeyota] #914928 11/10/08 11:06 PM
Joined: Sep 2005
Posts: 970
R
RatLabGuy Offline
Rock Warrior
It seems to me that the easiest route would be to just get a complete non-ADD third assemebly and change the whole thing, then all you have to do is replace the hubs and block off the engine vacuum lines. Granted, you have to acquire the assembly, but they can be found at junkyards for $125 or so, complete.


With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
-----------------------------
'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah
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