Factory Toyota 8" Full Float Rear Axle Information

[GRM]

I've done my fair share of searching for information about the 8" Full Float Rear Axle, which was normally a dually axle. I know its a fullfloater, with a 6 on 7.25" bolt pattern. Normally used from 1986 (or 1987 in RV's) until sometime in the 90's. I know they came as cab/chassis 2wd trucks. So the trucks lived their life as RV's Uhaul vans, and 12' flatbed trucks. Toyotamotorhome.org put out a pdf on them, but it doesn't help with our application (see: http://www.toyotamotorhome.org/classifieds/images/Axle_FAQ.pdf)

Thats the end of the concrete information I have on them. I have heard that they use the same hubs as full float fj40 and fj60 rear axles, so its an easy swap to 6 lug. I also have heard you can run Solid axle or IFS hubs on them, but need some sort of a spacer between the hub and axle shafts. Again, all speculative information.

I measured one earlier today, and found the bare housing from flange to flange was ~51" (86-95 IFS rear is ~52.5) and it was ~61" WMS to WMS on the hub.

What I am looking for is concrete information about 6 lug hub swaps for this rear axle, including Front hub, factory full float rear, or whatever else will fit. I'm also looking for the WMS to WMS distance with said hubs installed.

Just to clarify I did a quick search, and found a few pictures of trucks which have this axle. I apologize in advance if I took your photo from an ebay ad.

 

[WristPin]

does not make any sense to me how a manual hub would work on that whatsoever. unless you find evidence of that, i think you can forget about that.

other than that, i have no useful information to provide

 

[GRM]

does not make any sense to me how a manual hub would work on that whatsoever. unless you find evidence of that, i think you can forget about that.

other than that, i have no useful information to provide

It uses the entire manual hub body assembly, similar to what front range offroad fab uses for their full float kit. Not the locking hubs. See pic. I wonder in detail, what it takes to put this hub on that axle.

 

[missouriman]

humm looks like we might have found a spare for a broken lock out. I wonder if that will bolt up as a drive flange....

is that flange held on by the cone washers as well?

 

[GRM]

humm looks like we might have found a spare for a broken lock out. I wonder if that will bolt up as a drive flange....

is that flange held on by the cone washers as well?

It won't work as a drive flange. The axles look identical to these:

Yes, it uses cone washers, and the same studs as mini-truck hub studs.

Poly Performance Inc. :: Axles & Accessories :: Poly Performance Axles :: Toyota FJ40, FJ60 & FJ80 Full-Float Rear Axle Shafts - JK Synergy Suspension Systems, Fox Racing Shox, Beard, CTM, Johnny Joints®, Currie Enterprises, Edelbrock, Total Chaos, R

 

[Bogo]

I've been wondering about this axle too. With one of them and a higher load spring set. I could have a good 500+lbs additional load capacity on my 4x4 mini. Tire spacing was the main question I had.

 

[GRM]

You would need splines on both sides of the axle.
+
Graft a IFS spindle to the axle?

It would be some serious fab/machine shop S.

You have no idea what your talking about.

From what research I have found, SFA hubs will bolt in place of the stock hubs, and make it 61.5" wide, and IFS hubs to make it 65". But a 3/4" spacer is needed to go between the hub and axle shaft. Or a Full Foal fj60 hub will bolt in place.

 

[daveyclimber]

I have this axle in the works right now. Major issue is the brakes, converting to disk that is. I got a set of fj80 rear hubs and with them installed we are at 63 5/8" which is right inline with the fj80 front axle I am using in my tacoma.

 

[GRM]

the drums, and internals look identical to my '86 mini. Think there is a way to mount them up?

 

[ntsqd]

No way would I use any sort of spacer between the drive flanges of the axles and the hubs. Either have PP make those axles the length(s) that you need or use the ADD (or FJ80?) drive flanges and have someone like Moser, Dutchman, etc. make you doubly splined drive axles to fit.

 

[12volt]

No way wo uld I use any sort of spacer between the drive flanges of the axles and the hubs. Either have PP make those axles the length(s) that you need or use the ADD (or FJ80?) drive flanges and have someone like Moser, Dutchman, etc. make you doubly splined drive axles to fit.

I have this axle installed on my 4runner. You are correct about the spacer. I ran front 4runner hubs on this axle with custom spacers I made and it lasted one trip. The solution is the FJ80 hubs and use the stock axle shafts that comes with uhaul axle. I also used the brakes from the FJ80 axle and custom made a bracket for the calipers.

 

[pappy]

Good info. Talk about resurrecting the dead. Did you use the FZJ80 front or rear hub?

 

[12volt]

I used the rear hubs, came with e-brake assembly.

 

[907T4R615LC40]

fj80 hub on ifs stock 4yl from 4runner...

I have a set of fj80 axles I was planning on using for my 71 40.

I just got back my old 4runner from a buddy.

Been looking at Full Float kit and different rear brake options.

12 Volt Guy Do you have any write ups on this?

 

[ajordan1975]

use this.
http://frontrangeoffroadfab.com/nfoscomm/catalog/product_info.php?products_id=94