PDA

View Full Version : Aisin Hubs on an 80


Jenny Cruiser
06-10-2007, 12:51 AM
What size Aisin hubs fit an 80 and where do you get them? I think that's what UB has on his 40th. I found a pair on a 4runner the other day and it got me thinking. :)

Uncle Ben
06-10-2007, 04:35 AM
Straight axle mini truck/Runner or FJ-6x.

Jenny Cruiser
06-10-2007, 08:04 PM
Mahalo.:)

Shark Bait
06-10-2007, 08:40 PM
Straight axle mini truck/Runner or FJ-6x.

I didn't know you could do that! Makes sense. I suppose the manual hubs are better than the automatic ones. Can you replace an auto hub in the field with a manual one?

Uncle Ben
06-10-2007, 08:59 PM
I didn't know you could do that! Makes sense. I suppose the manual hubs are better than the automatic ones. Can you replace an auto hub in the field with a manual one?

Auto hubs? This aint no domestic dood! :rolleyes: :hill:

nakman
06-10-2007, 11:14 PM
Auto drive flange? as opposed to a, er, manual one :confused:

Red_Chili
06-13-2007, 08:43 AM
I replaced a flange in the field with a manual hub... the day before I rolled it! No connection.

Convert
06-13-2007, 07:01 PM
Straight axle mini truck/Runner or FJ-6x.

Please tell me more are we talking back or front, what about the center diff?
Please help the tech challenged:bowdown: :bowdown:

Uncle Ben
06-13-2007, 07:59 PM
Please tell me more are we talking back or front, what about the center diff?
Please help the tech challenged:bowdown: :bowdown:

If you run them in the front it's a direct swap with the drive flange. You will need a center diff lock switch in order to reap the benefit. Supposedly you will gain 1-2 mpg buy pulling the front DS and unlocking the hubs. You will have to drive with the center diff locked all the time or install a part time kit in place of the viscous coupler. I have been running 2 wd since Moab and to be honest I like the way it drives better but really haven't noticed any increase of mileage. Running them front and rear you could flat tow behind another vehicle.

Shark Bait
06-13-2007, 08:34 PM
You will need a center diff lock switch in order to reap the benefit. Supposedly you will gain 1-2 mpg buy pulling the front DS and unlocking the hubs. You will have to drive with the center diff locked all the time or install a part time kit in place of the viscous coupler.

OK. Why? :confused:

Uncle Ben
06-13-2007, 08:53 PM
OK. Why? :confused:

Self explanitory! Part time vrs full time, less wear on the mini truck junk in front, less wear on the Birfields and as stated some claim increased mileage.

Shark Bait
06-13-2007, 08:59 PM
Self explanitory! Part time vrs full time, less wear on the mini truck junk in front, less wear on the Birfields and as stated some claim increased mileage.

OK. Normal every day driving on the road I shouldn't need to use the center diff lock, right? Your post said you'd need the center diff lock with selectable hubs installed. If I put Aisin hubs on it instead of drive flanges then it's just like my FJ40, right? No AWD. What am I missing in your explanation? I'd love an extra mpg or two. :p:

Uncle Ben
06-13-2007, 09:38 PM
OK. Normal every day driving on the road I shouldn't need to use the center diff lock, right? Your post said you'd need the center diff lock with selectable hubs installed. If I put Aisin hubs on it instead of drive flanges then it's just like my FJ40, right? No AWD. What am I missing in your explanation? I'd love an extra mpg or two. :p:

If you turn out the hubs and pull the front driveshaft without pushing the center diff lock you will not go anywhere. The T-case has a viscous coupling inside. Power will simply go out the path of least resistance which will be the unlocked front drive.

Shark Bait
06-13-2007, 10:25 PM
If you turn out the hubs and pull the front driveshaft ....

Why would I pull the front drive shaft unless I was towing the cruiser? Assuming I install Aisin hubs and do noting else, can I drive the vehicle in 2WD? And then when I go off road I lock in the hubs? Sorry to press about this. I'm just trying to understand. I get the less wear and tear on the forward drive train. OK. I'd love more mpg, but if it really doesn't improve then is it worth it? It looks cool. :grinpimp:

nakman
06-13-2007, 10:34 PM
Why would I pull the front drive shaft unless I was towing the cruiser? Assuming I install Aisin hubs and do noting else, can I drive the vehicle in 2WD? And then when I go off road I lock in the hubs? Sorry to press about this. I'm just trying to understand. I get the less wear and tear on the forward drive train. OK. I'd love more mpg, but if it really doesn't improve then is it worth it? It looks cool. :grinpimp:

If you do that technically yes, you'll be in 2wd but you're still spinning your front driveline.. all the way until the last link where it meets your wheel. Your driveshaft, diff, and axles would still be spinning. Dropping the DS then locking the center diff puts you in 2wd mode.. you could do this now but your front driveline parts are still spinning, it's not until you add the hubs that those components can be at rest.

Best argument IMO for 2WD or PT kit is if you want to run Longfields and keep them around for a while, since they wear faster than stock birfs. So you could disable your front axle unless you were wheeling. Also it's an added trail benefit if you were to break a birf or axle you could get away with not fixing it, just disable the axle then get off the trail in 2wd.

I've run w/o the front shaft in and didn't really like how it handled, felt more "squatty" in turns, since the front wasn't pulling anymore. Was fun to kick the back end out a couple times though on dirt.. :hill: slight mileage improvement, but the truck felt heavier coming off the line.

Uncle Ben
06-13-2007, 11:29 PM
Viscous coupling is in the T-case. Power is delivered via the transmission to the VC and biased out to f&R axles. Because of fluid coupling, power could actually all go to whichever axle has the least resistance. (Although there is some fairly strong bias going on) It is like a limited slip in your T-case. Locking center dif overides VC and locks F&R output shafts together. Your 80 does not have a 2wd option in the t-case like your older cruisers do. Think of it like on your 55 if you twisted a rear driveshaft. You can simply unbolt the broken rear shaft and engage 4wd and drive home on front drive with the hubs turned in. You don't lock in 4WD you don't go anywhere!

Shark Bait
06-14-2007, 12:19 AM
OK. So I'm not sold on putting selectable hubs on instead of the drive flanges. You haven't sold me yet. :)

Uncle Ben
06-14-2007, 07:44 AM
OK. So I'm not sold on putting selectable hubs on instead of the drive flanges. You haven't sold me yet. :)


Good....they're a PITA! :rolleyes:

Hulk
06-14-2007, 09:32 AM
I thought Christo had figured out a way to mod the transfer case so you could run part-time 4WD w/o pulling the drive shaft. The whole drive shaft thing is the deal killer for me.

SteveH
06-14-2007, 09:34 AM
And if you accidentally bump your CDL switch while going 70 MPH with the hubs unlocked, I'll bet your viscous coupling would fry in a heartbeat. Not worth the risk to me, even though I agree that manual hubs would look sweet on an FZJ.

Reminds me of the Explorer I saw in a diff shop where the owner's dog lunged into the front seat, hit the 'pushbutton 4WD' in an odd way, and locked up the entire drivetrain while going 70 mph. The tranny survived, the but the entire xfer case *housing* was twisted. Ouch. $$$.

Uncle Ben
06-14-2007, 10:25 AM
And if you accidentally bump your CDL switch while going 70 MPH with the hubs unlocked, I'll bet your viscous coupling would fry in a heartbeat. Not worth the risk to me, even though I agree that manual hubs would look sweet on an FZJ.



Nothing will happen if the button gets bumped. The VC has quite a bit of bias and will actually drive the truck under light load.

I thought Christo had figured out a way to mod the transfer case so you could run part-time 4WD w/o pulling the drive shaft. The whole drive shaft thing is the deal killer for me.

Christo does sell a part time kit. It replaces the VC with a solid hub that effectively will remove the bias and leave you with a part time case. The downside is, as you know, all wheel drive ROCKS in the winter!!!!! The Part time kit also comes with AVM hubs which are (IMO) a serious downgrade to Aisens!

nakman
06-14-2007, 11:09 AM
I thought Christo had figured out a way to mod the transfer case so you could run part-time 4WD w/o pulling the drive shaft. The whole drive shaft thing is the deal killer for me.



Yes, it's called the "part time kit."

Convert
06-14-2007, 08:10 PM
Thanks UB I'm interested the idea of flat towing behind the motorhome would solve some problems for me. Any issues flat towing an 80 ?

Hulk
06-14-2007, 11:34 PM
Christo does sell a part time kit. It replaces the VC with a solid hub that effectively will remove the bias and leave you with a part time case. The downside is, as you know, all wheel drive ROCKS in the winter!!!!! The Part time kit also comes with AVM hubs which are (IMO) a serious downgrade to Aisens!

Did you install the part-time kit (with your Aisens)?

And couldn't you just put it into 4 High in the winter when it snows? :confused:

Uncle Ben
06-15-2007, 01:22 AM
Did you install the part-time kit (with your Aisens)?

And couldn't you just put it into 4 High in the winter when it snows? :confused:

No

Yes

Uncle Ben
06-15-2007, 01:24 AM
Thanks UB I'm interested the idea of flat towing behind the motorhome would solve some problems for me. Any issues flat towing an 80 ?


Silly thing was I spent the money and set it up to flat tow then we sold the motor home! :rolleyes: Go figure....