YotaTech Forums - View Single Post - Are ADD hubs pretty much just manual hubs that are always locked?

Cebby · 11-11-2005, 04:26 PM

There's a little more to it than that, but first I'd like to commend GradSR5 on searching and asking an intelligent question. Bravo!!

In addition to the drive flanges, the other components in the ADD system include an actuator on the long side of the front diff assembly that uses vacuum to disconnect the axle shaft from the diff. The rigs that came with manual hubs from the factory, don't have this actuator and all the related stuff, so they are a simpler more reliable system (by fewer parts). When I regeared, I just used an older non-ADD style front pig so I eliminated all the ADD stuff on mine with no ill-effects. I had replaced the flanges with manual hubs previously.

And no, ADD is not Autolocking. That is something different completely.

11-11-2005, 04:26 PM	#7 (permalink)
Cebby Contributing Member Join Date: Sep 2002 Location: Pittsburgh, PA Posts: 11,246	There's a little more to it than that, but first I'd like to commend GradSR5 on searching and asking an intelligent question. Bravo!! In addition to the drive flanges, the other components in the ADD system include an actuator on the long side of the front diff assembly that uses vacuum to disconnect the axle shaft from the diff. The rigs that came with manual hubs from the factory, don't have this actuator and all the related stuff, so they are a simpler more reliable system (by fewer parts). When I regeared, I just used an older non-ADD style front pig so I eliminated all the ADD stuff on mine with no ill-effects. I had replaced the flanges with manual hubs previously. And no, ADD is not Autolocking. That is something different completely. __________________ UZswap.com A site dedicated to sharing info for swapping the Toyota/ Lexus UZ (V8) engines into Toyota Trucks and 4Runners. My 4Runner 1993 4Runner, 1UZ (V8) auto dual ultimate crawler, double locked, 35's on beadlocked SR5 alloys, low lift, hacked fenders, tubbed firewall, custom armor TOOLandFAB.com A discussion forum dedicated to tools, fabrication & workshops. See my JD2 Bender Hydro Conversion BUY THIS 2008 CALENDAR Last edited by Cebby; 11-11-2005 at 09:07 PM.