I have been dealing with a vibration in the rear of my 95 4runner for a while now. Today I took the rear driveshaft off to help diagnose the vibration. Much to my suprise the truck will not move. I engaged the hubs, and have no movement at the front driveshaft. If I unlock the hubs the front driveshaft spins.

I have a V6 with auto trans.....whats the deal??

 

It should work. Has 4WD ever been used? Might want to check the A/T t-case shift linkage to see if it is moving OK:
- http://www.4crawler.com/4x4/ForSale/...tomaticTranny1

And if the truck is ADD-equipped, check out the system:
- http://rubicon.off-road.com/toyota/tech/add/

 

Yep, it should work. I drove around like that for a week or so.

 

The 4 wheel drive has been working fine...I used it a couple weeks ago. I also manually shifted the linkage to be sure.

The ADD has been gone for a year..since the SAS

Like I said before, when the hubs are unlocked the driveshaft spins at the same speed as the rear flange.

I am just wondering if the tranfercase has some sort of load sensing clutch or limited slip.

 

Found this thread....

https://www.yotatech.com/forums/show...ear+driveshaft

looks like I may have a problem with my transfercase.

 

I hate broken stuff...now I have more things to fix. Anyone here in SD have a transfercase laying around??

 

so your saying that if you unlock the hubs, shift it in gear, and look underneeth you see the front driveshaft turning?

The A340H is a hydrolicly shifted transfer case. Check your fulid levels, theres a seperate check and drain plug on the rear.

your gonna have a hard time finding just the rear transfercase for a A340H as they are kinda one piece. (not the best pic but you get the idea)

 

I need to drain and fill the case tomorrow. I want to see the magnet. There is a samall leak at the speedo cable....maybe it is low

 

I hope it is because it is low on fluid. Makes sense though...most of the time when I use the 4wd the truck is warmed up, and when I tried it without the rear driveshaft it had been sitting all day.

I need the $5.00 fix as now I get to have some driveshaft expenses.

 

I changed the fluid in my T-case and topped off to the proper level, and trans fluid is good. The drain plug magnet was clean. I also checked the linkage. Tried it again today and was able to move slowly in drive/4 hi, but the engine was revving and there was no torque from the front wheels. In reverse or 4lo it would not move.

I then replaced the rear driveshaft and the truck sure acted like it was in 4wd??

I am at a loss.

 

That is strange...and there is no unusual noises?

 

There is a way now to put a gear driven transfer case or 2 behind the A340H, but it requires an adapter and some mods. Look here if you're interested:
http://www.pirate4x4.com/forum/showt...fer+case+mount

 

Too much $$$ for the adapter, plus I would need to redo my new driveshafts...

Bump for someone who knows what the deal is...

 

duals baby!!!!

 

remove front drive shaft it will help to clear some doubts

 

Get a gear drive with Marlin's 4.7:1 and that adaptor plate.

The output location shouldn't change much. Maybe 6" back? Unless your driveshaft is bottoming out already, that should work....right?

 

I took the hubs apart, and found a ton of grease in there. I cleaned them all up and now things are working fine. I will test it on Sunday.

 

Sounds like a hub problem.

I had the same problem with my cruiser, turned out to be a bad hub, no noise either, it was weird.

maybe a bad front diff, of axle? Broken Birfield?