what is ADD?
Jan 20, 2007 | 11:38 PM
#1
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From: milwaukee, WI baby muddin in the streets!!
what is ADD?
what is a add??? its the hub but what it is it i have manual locking hubs and ive seen auto lockers but what is a add hub if it is a hub thanks for helping me on this mater oh and the turbo's digit dash i want one but will it work on a 87 sr5 dash (the clusters)
Jan 20, 2007 | 11:54 PM
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From: Idaho
ADD.. Automatic Axle Disconnect. If you have manual hubs you dont have ADD. ADD is for shift on the fly rigs. Your CV's are always engauged, and there is a two-piece shaft inside the axle, there is a sleve and a forked acutator that engauge when you select 4wd.
Jan 21, 2007 | 12:06 AM
#3
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From: milwaukee, WI baby muddin in the streets!!
ok ok then my runner came with add i guess but i have the man locks so can i drive with the front hubs locked and in 2wd??? and anyone know about the turbo's cluster??
Jan 21, 2007 | 12:48 AM
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From: Idaho
Jan 21, 2007 | 12:59 AM
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From: Cal Poly Pomona or Redlands, CA
uhhhh.... my understanding was there were 3 types of hubs: manual, the kind with the dial you turn to lock it. auto hubs, which sucked, basically an automatic manual hub that didnt work very well. and then ADD, which means the hubs are always locked, but the front differential disconnects itself from the drive shaft.
Jan 21, 2007 | 01:07 AM
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From: Idaho
a few months old, but accurate..
ok....a lot of misinformation in this thread. Let me clear it all up.
First off. Auto Hubs vs ADD.
ADD is a diff disconnect, Auto hubs is a HUB disconnect similar to the old blazers.
AUTO hubs was an option in 84-89 4Runners, and 84-88 Pickups.
In 1989, they switched to ADD in the PICKUPS only! The 1989 4Runner still have Auto HUBS. In 1990, the 4Runner changed over to the ADD setup.
What 89macrunner has, is AUTO hubs. He will need the spindle nut conversion before Manual hunbs can be installed.
Going from ADD to manual hubs IS easy, because ADD uses manul hub spindles with a lock plate instead of hubs.
Going from AUTO hubs to Manual hubs is more difficult, becuase the locking mechanism in the actual spindle is different, and requires a spindle nut conversion.
First off. Auto Hubs vs ADD.
ADD is a diff disconnect, Auto hubs is a HUB disconnect similar to the old blazers.
AUTO hubs was an option in 84-89 4Runners, and 84-88 Pickups.
In 1989, they switched to ADD in the PICKUPS only! The 1989 4Runner still have Auto HUBS. In 1990, the 4Runner changed over to the ADD setup.
What 89macrunner has, is AUTO hubs. He will need the spindle nut conversion before Manual hunbs can be installed.
Going from ADD to manual hubs IS easy, because ADD uses manul hub spindles with a lock plate instead of hubs.
Going from AUTO hubs to Manual hubs is more difficult, becuase the locking mechanism in the actual spindle is different, and requires a spindle nut conversion.
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Jan 21, 2007 | 01:14 AM
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uhhhh.... my understanding was there were 3 types of hubs: manual, the kind with the dial you turn to lock it. auto hubs, which sucked, basically an automatic manual hub that didnt work very well. and then ADD, which means the hubs are always locked, but the front differential disconnects itself from the drive shaft.
Jan 21, 2007 | 05:29 AM
#10
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From: Idaho
Saves wear and tear on CV's, espically if you have increased angles from BJ spacers or tbar crank. You may also see a mpg gain on the fwy, but negligible in town.
And most folks dont switch, they just add hubs to the setup.
And most folks dont switch, they just add hubs to the setup.
Jan 21, 2007 | 07:23 AM
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From: Idaho
It works in reverse with anything... but some auto hubs, dont know about toyota, need you to go in revers to get them to disengage... ADD is not affected by direction, nor are auto or manual hubs.
Jan 21, 2007 | 08:24 AM
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Jan 21, 2007 | 11:18 AM
#16
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From: Idaho
Jan 21, 2007 | 11:50 AM
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From: Cal Poly Pomona or Redlands, CA
i know my add works in reverse, ive used it ALOT!!!
we went down this trail that just ended and dropped off the side of the mountain. i was in the rear of the group, so i had to back up some pretty sandy hills, tried it in 2hi, just dug, so i put it into 4low and it just crawled up the hills.
we went down this trail that just ended and dropped off the side of the mountain. i was in the rear of the group, so i had to back up some pretty sandy hills, tried it in 2hi, just dug, so i put it into 4low and it just crawled up the hills.
