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View Full Version : What's my full floater?


subzali
06-05-2008, 10:08 PM
I know almost nothing about full floating rears, but now I have me one ;)

I was hoping someone could mention a couple things of note.

I noticed that the brake lines do not look OEM, and neither does the mounting bracket for the connector (unless Toyota half-welds the bracket with a booger weld, maybe? :confused:)

There is only one wheel cylinder per side, and it looks like it's self-adjusting with the e-brake on the rear drum. So does that mean I can swap my tranny/tcase out for an h55f/split case? :)

2 3/8" wide brake shoes, are those the larger ones?

Will the track width change much over stock, or enough to affect steering? This is off a 40 series I believe, so the inner axles should interchange with the fronts and the track width should be compatible. I'm excited! :D

subzali
06-05-2008, 10:09 PM
More

wesintl
06-05-2008, 10:28 PM
70 series, could be a late 40 series too. i don't know the differences between those 2.

I'm sure the brake lines get mangled in shipping. So it's a homemade job.

Shark Bait
06-05-2008, 10:33 PM
Beats the heck out of me. :D

subzali
06-05-2008, 10:46 PM
Thanks Chris :rolleyes: :D

I'm just excited about it. I think a 70 series is slightly wider than a 40, so I need to get some measurements and double check. If it's wider in the rear than the front that will affect steering won't it?

Also, is the rear hub different to the point where I need any extra tools to service it?

Uncle Ben
06-05-2008, 11:28 PM
Thanks Chris :rolleyes: :D

I'm just excited about it. I think a 70 series is slightly wider than a 40, so I need to get some measurements and double check. If it's wider in the rear than the front that will affect steering won't it?

Also, is the rear hub different to the point where I need any extra tools to service it?

I believe the FF was from a 45....no idea of vintage.

subzali
06-06-2008, 06:49 AM
Zepp knows a fair bit about full floaters...hopefully he'll post up. I like the diversity of knowledge we share in this club! :D

This is a later vintage (8/80-1984), because of the 4 bolts holding the backing plate on and the ebrake. Apparently the earlier ones had 6 (?) like the fronts, so the front discs are a direct bolt-on. With this one, if I wanted rear discs, I'd have to pull some kind of hybrid together from minitruck/Cruiser parts or special brackets from TJM or the like.

Not quite sure what I want to do yet, the ebrake possibilities have got me thinking...

60wag
06-06-2008, 07:28 AM
The brake assembly looks nearly indentical to a 60.

Rzeppa
06-07-2008, 01:06 PM
The brake assembly looks nearly indentical to a 60.

That is correct - it looks very similar to the one I had on the back of my 1997 HZJ75. It is NOT from an FJ45: those are not the 3" FJ45 shoes. Also, though not shown, the FJ45 drums have ribs around the outside.

70 series axles are 20mm wider than 40 series. Not sure what others do when mounting 70 series axles onto a 40 series, but cutting off the spring perches and rewelding inward would seem a likely possibility. If it's off a 40 then bolt it on. One cool thing about this setup is you'll have the option of going to a split case (maybe behind an H55F if you choose) because you won't need the t-case mounted parking brake.

No special tools required for servicing, however the later versions have the same adjusting nut and seal setup as 93-97 FZJ80s and use the same parts. Brake parts are same-same as a 60 or 62. The earlier version uses a different adjusting nut which is hex and same as front - 54mm. Also, the seal goes in the nut itself. Having worked on both, I like the earlier setup better.

subzali
06-20-2008, 06:42 AM
As Zepp said, no vented drums...

Beater
06-20-2008, 06:51 AM
let me know if you want/need to move the perches

subzali
06-29-2008, 07:15 AM
Well after taking some measurements I'm 95+% sure that this is from a 60 series. It's a little over 52" between the heads of the bolts that bolt the brake backing plate to the axle, compared to my 40 which is closer to 48". Question - are the 60 series axles only longer on the long side? Or did both axle lengths change? I haven't been able to pull the long side axle shaft out yet to check it, but it looks to be about 3-4" longer (judging by the housing) than my 40. Makes me wonder if the cut and turned axle is from a 40 or a 60, maybe Timm could take some measurements next time he's at his storage unit?

It being a 60 series would explain the emergency brake and the drum size and configuration, among other things. I will check to see if it has 3.73 or 4.11 gears next time I get a chance.

Rzeppa
06-29-2008, 10:42 AM
Well after taking some measurements I'm 95+% sure that this is from a 60 series. It's a little over 52" between the heads of the bolts that bolt the brake backing plate to the axle, compared to my 40 which is closer to 48". Question - are the 60 series axles only longer on the long side? Or did both axle lengths change? I haven't been able to pull the long side axle shaft out yet to check it, but it looks to be about 3-4" longer (judging by the housing) than my 40. Makes me wonder if the cut and turned axle is from a 40 or a 60, maybe Timm could take some measurements next time he's at his storage unit?

It being a 60 series would explain the emergency brake and the drum size and configuration, among other things. I will check to see if it has 3.73 or 4.11 gears next time I get a chance.

I seem to recall that only one side is different and that it is the long side.

Many if not most non-USA 60s (and late 40s) remained 4.11, while the USA market got the 3.70 for highway manners starting in January 1979.

treerootCO
06-29-2008, 11:07 AM
Only the long side axle shaft changed. The short side is the same as the 40's.