Tacoma front diff interchangeable with a 3rd gen?

[Dous]

Yea that differential is from an ADD truck. Just slap your ADD tube onto it and you are good to go!

 

[SCRunner12]

I found this info on TTORA. From what I'm gathering is a manual hub diff is the same, but needs the add acutator and tubes.

On the Tacoma models, the diff itself is the same between the manual hubs and ADD. All thats done to make one or the other is to bolt on the necessary extension tube for the manual hubs or the actuator for the ADD. If the diff is the same between the Tacoma and the 4runner, then yes you can use that diff for your truck. Just swap the necessary parts to maintain your manual hub configuration.

ADD front diff into manual hub Tacoma - TTORA Forum

 

[danthemanx07]

Yea that differential is from an ADD truck. Just slap your ADD tube onto it and you are good to go!

And he should already have the ADD equipped tube in the 1999 4runner right?? So nothing else needed right?

Just trying to make sure I know for when my time comes! :biggrin2:

 

[cj80cruiser]

OK, so I have needle bearings and a vacuum port. I don't see any place for an electrical connection of any kind. Does this mean this diff is 100% compatible, no changes needed?

Are you talking about the ADD actuator connection? That's on the tube that you'll take off your current diff.

 

[danthemanx07]

Are you talking about the ADD actuator connection? That's on the tube that you'll take off your current diff.

I think he is talking about the spindle bearings as pictured above by Dous. Those are inside the clamshell on either side where the axles enter the clamshell.

 

[cj80cruiser]

I think he is talking about the spindle bearings as pictured above by Dous. Those are inside the clamshell on either side where the axles enter the clamshell.

I was referring to his comment about an electrical connection.

 

[danthemanx07]

I was referring to his comment about an electrical connection.

Ah. Gotcha.

 

[white_n_slow]

Yeah, I was referring to the ADD electronics. So I will just bolt whatever's on my runner onto this diff, right? It should be vacuum on a '99?

:edit:
I also thought I would post this since I was pretty confused about it and others searching may find this useful. If any mods are reading this thread, this info should definitely be in our FAQ. Please and thank you.

Automatic Disconnecting Differential (ADD): A 4WD system found on many Tacomas and 4Runners. Whereas traditional 4WD systems utilize manual locking hubs that must be locked by hand, the ADD system utilizes live hubs that are always locked. What this means is that even in 2WD, while moving, the driver-side and passenger-side axles and the differential are always spinning (the front drive shaft does not spin in 2WD). When in 2WD, although spinning, the driver-side axle is disconnected from the differential via a vacuum-actuated or electronically-actuated sleeve. When shifting the transfer case into 4WD, the front drive shaft is engaged, and the ADD actuator forces the sleeve toward the passenger side of the vehicle, effectively locking the splines of the driver-side axle with those of the differential.

And finally, given the way the ADD is actuated, would it be possible to put a manual switch on the ADD? If so, this would be a much easier way of running an automatic locker in the front and run 3wd unless the front locker is needed (compared to converting to manual hubs and jumping out of the truck to lock the hub)