Old 40 FF in a 60?

Tinker · 01-19-07, 12:49 PM

Just got back from visiting The Street Rod Manufacturing Co. in Castle Rock, CO, & found out what was advertised on Ebay as a 60 FF is really an old 40.

Will it fit? What about the yoke (I know it's on me)?

BTW those guys really seem to know their stuff. Asked them about a diff mounted disc ebrake & they said they don't have one for a 60 (40?) but I could use an existing rotor & caliper & fab the bracket myself. Also, they sell NEW eldo calipers for their kits.

hks3sgte · 01-19-07, 12:50 PM

40 axles are a bit too narrow for the 60.

The Dude · 01-19-07, 01:01 PM

Yup, it's a tight fit and you will most likely get rubbing issues on the inside fenders with any kind of flexing.

I have a 40 FF under a 60 series frame right now with no body on it...I am not sure if wheel spacers will be enough or if I am going to have to cut and legthen the long side to match the 60 series width.

Tapage · 01-19-07, 01:14 PM

Question .. and andwer to you honestly ..

Why FF . ?

If you have a broke rear diff and need to make a swam and don't have any other option .. nice go with 40 ( narrow about 4" if I remember well ) FF rear axle ..

But if not .. why complicate the situation with spacers .. don't get me wrong .. I have 2" wheel spacers in all corners of my 60 with SF axles and no problem over 2.5 years ..

But if you don't need it ..

The Dude · 01-19-07, 01:18 PM

For me it's the E-locker for the rear and I have a set of spare axles for the FF

I am sure I will end up widening the axle to 60 series width, then I can use 60 series FF axles.

nuclearlemon · 01-19-07, 01:48 PM

Quote:

Originally Posted by Tinker

Just got back from visiting The Street Rod Manufacturing Co. in Castle Rock, CO, & found out what was advertised on Ebay as a 60 FF is really an old 40.

Will it fit? What about the yoke (I know it's on me)?

BTW those guys really seem to know their stuff. Asked them about a diff mounted disc ebrake & they said they don't have one for a 60 (40?) but I could use an existing rotor & caliper & fab the bracket myself. Also, they sell NEW eldo calipers for their kits.

in addition to being 3 " too short, the yoke most likely will be different and it will probably be course spline. just swap in your 60 diff and don't worry about it.

Tinker · 01-19-07, 04:26 PM

So anyone know what the axle tube length for a 60 should be? This is kinda confusing since there are factory-looking sway bar link mounts on it. It is allegedly a JDM 60 FF. It has big drums. The matching front axle has drums the size of God.

Mark W · 01-19-07, 04:36 PM

Sounds like an FJ45 setup. Sway bar on the rear and big finned drums front and rear.

Puting a '40 width axle under a '60 is kinda a hack. IIRC the FF housing is only $450 from SOR?

If you want to put rear discs on a FF axles, use Cruiser stuff to match the front. Simple swap if you don't mind sacrificing a set of Cruiser or minitruck knuckles (damaged ones work fine).

Mark...

fng55 · 01-19-07, 08:11 PM

if you do a disk conversion, use IFS hubs. they fit the same spindle and will widden your wms-wms distance...
just a thought, carl

dsa03cjj · 01-20-07, 07:46 AM

it will be a fit tight . . . and when rubbing comes in to play, more gets hurt than you know and can see

Tinker · 01-20-07, 09:05 AM

Thanks Markie - I was afraid of the "JDM 60" designation on Ebay but got caught up in auction fever (actually I think I was the only idiot stupid enough to find out what the reserve was). But still, the end-to-end of the housing itself is about 60". Does that confirm it as a 45?

I'm interested in what you & Fng mentioned about Taco hubs - how much would that increase the width? & how in the hell would you mount the calipers on it? & what rotor would you use? Talk about a Frankenstein!

Mark W · 01-20-07, 12:23 PM

Wasn't me talking about the hubs. Front hubs won't work on the back. While the will fit the spindles, the axles are not the right length to function with front hubs. The hubs on the FF rer are not the saeme as the ones used in the front end.

So the answer to your question about how it increases the width is... It won't.

The rear disc conversion using front end Toy parts adapts the rotors to rear hubs.
The calipers are mounted using brackets made from sacrificing a set of front knuckles. (Ideally find a damaged knuckle or two).

Mark...

Tinker · 01-20-07, 08:11 PM

Mark -
Think I've seen the knuckle cut-up somewhere. Thanks for the clarification on the IFS front hubs. I'd still like to verify this isn't some kind of wierd 60 axle - the housing is about 60" from end of spindle to end of spindle. I'll measure it exactly when I get to work Monday. So if someone has an idea about the width of a real 60 FF housing...