85toyman

iTrader: (2)

Your hubs are always locked with the add flange drive. If you pull the plastic cover off the front wheel and look you will see a flange with a gold/zinc colored cover on it. There are six outside nuts. That is the flange. It connects the whole assembly together. If you have manuel hubs it replaces the flange and gives you the ablility to unlock the whole thing.

93runnerguy

so im going to always be locked and always be spinning until i switch to a manual hub? so i shouldnt be able to turn thre front driveshaft even when i am in 2H

85toyman

iTrader: (2)

From what I read, this is the case. I switched on my 4runner awhile ago to factory toyota hubs and have been very happy. When you get a chance I would suggest you do it as well.

4Crawler

iTrader: (3)

With the ADD actuator disengaged, you should be able to spin the front driveshaft in 2H:

http://www.off-road.com/trucks-4x4/t...tem-19259.html

tried4x2signN

ADD has NO hubs...

It's a drive flange. Axle splines fit around it, and it's bolted to your hub assembly.

Drive flange:



Manual locking hub:

tried4x2signN

Well if you wanna pay anything less that ridiculous, try a salvage yard or Pull-a-part...

Craigslist? Ebay?

Or pay retail... @ $200.

Oh, and BTW. There are NO higher quality hubs than the OEM AISIN's that came on these trucks... So don't ask about Warns or MileMarkers.

Unless your actuator is broke, all you have to do is bolt the hubs on.

DO NOT "mod" the axle by putting a band clamp around the locking collar forcing it locked at all times.

Just bolt the hubs on and you can unlock them, or lock them and have THE SAME EXACT shift-on-the-fly system you have now...

So in summer or long drives, you can un-lock them.

Winter or whatever, run them locked... If you're lazy


lol, I already tried that trick... in post #16

93runnerguy

so my hubs arnt locked since i dont have them, so i will constantly spin untill i switch to my manual hubs?

tried4x2signN

One more time...

Read this link,

http://www.off-road.com/trucks-4x4/t...tem-19259.html

Look at this picture



And these...

93runnerguy

so tried4x2sign this is from a site you told me to look at
"There is a pneumatic device called an "actuator" attached to the front differential that effectively slides the driver side shaft out of the differential. On trucks that have ADD Toyota uses "live hubs" (see hubs section below). This means that both front half shafts and the front diff spin even in 2WD (but not the front drive shaft)."

but my front drive shaft spins when it is in 2H and this site says its not supposed to? so any ideas what it can be?

93runnerguy

oh and the site is
http://www.off-road.com/trucks-4x4/t...tem-19259.html

4Crawler

iTrader: (3)

Could be the ADD actuator is locked into 4WD mode. One common cause is that the two vacuum lines to the actuator are swapped. There is one line to lock (4WD) the actuator and one to unlock it (2WD). Or might be someone permanently locked the actuator or even replaced it with a non-ADD front axle center section.

Easy way to tell is lift the driver's side front tire off the ground and try to spin it (in 2H). If it won't spin, then the actuator is locked.

93runnerguy

Alright well as of right now my front driveshaft is off the truck, but when i spun the right front tire the diff flange turned, so im figuring it is locked.

but why is it that the flange from the tcase is spinning in 2H when its in drive?

4Crawler

iTrader: (3)

Must be something messed with the t-case shift linkage or if that is OK, then something is messed up inside the t-case itself. Could be the linkage popped off in 4H and then you move the shifter to 2H but the case stays in 4H. Test by seeing if you can shift into 4L and notice a gearing difference or not.

tried4x2signN

delete wrong thread

93runnerguy

yes going into 4low i notice a gearing difference, so then it must be something is wrong internally with the tcase?

4Crawler

iTrader: (3)

Well, if it shifts in between 4H and 4L, then the linkage is likely OK, unless there is something preventing it from going into 2H. But if the linkage is OK, then something inside the t-case *must* be making the front d-shaft flange turn, or there is something internal that is not disengaging the front wheel drive section of the t-case.

93runnerguy

any ideas of what to look for?

4Crawler

iTrader: (3)

Never looked at an automatic or V6 t-case, so no personal experience. Download one of the Factory Service Manuals and start reading the t-case section.

tried4x2signN

Man I've typed a thesis on these dang H cases recently...


The TC is more like a parasite that feeds off the tranny. They are not two different systems.

And I, like Crawler, have no personal experience to tell you where to look...

other than the pirate A340 FAQ, and http://www.transtec.com/rebuilder_news/1st_q00r-n.pdf


sorry...

BUT WAIT! There's MORE!

"Transfer case is hydraulically actuated, high or low range will not engage without pressurized ATF.
Valvebody is electronically controlled by #4 soleniod, located in small pan below reduction case."

93runnerguy

Alright so i decided to just go ahead and get a new transfer case, mine started making a weird whining noise while driving, im assuming since ive been driving it around with it stuck in 4WD, and im just going to get a used one, but i know from 89-95 toyota had the same AT tranny but two different transfer cases, does anyone know what year it was changed?