Full float fj40 axle build (1 Viewer)

[craptabulous]

Now for the scary part . Measuring for shafts , i found a drawing on the ih8clips thread . The only question i have is for the spline length on the flange end . The distance is 1.182” but the rcv flanges are only .80” thick this would alow the shaft to move .382” to me that seems like alot .

I know rcv makes a set up for a 80 axle using rcv flanges i reached out to them to see if i could get the dimensions they use , i know the OAL will be different and the seal location will also be different . But spline lengths should all be the same .



Shafts are probably going to cost me 1500$ cad maybe more if this trade war starts next week .

 

[craptabulous]

What size axle will fit thru the seal holders.

The seals are sized for a 1.300” seal surface , the same as the factory front axle shaft seal’s they slide over a set of 30 spline rcv’s

 

[peesalot]

The snap ring and the end of spline on the drive flange keep shaft located from walking in & out.

 

[craptabulous]

The snap ring and the end of spline on the drive flange keep shaft located from walking in & out.

The snap ring only keeps the shaft from walking in , the shaft would be able to move .382 “ on the splines .

im just wondering if i should have those outer splines cut shorter ?

The main thread on this ( ih8clips) used the tg hubs ,a very different setup .

 

[peesalot]

I get 1.177 spline cut from the drawing which yields .218 ( less than 1/4 ") which IMO wouldn't hurt anything. Could have another snap ring grove milled in on the inside.

 

[craptabulous]

I get 1.177 spline cut from the drawing which yields .218 ( less than 1/4 ") which IMO wouldn't hurt anything. Could have another snap ring grove milled in on the inside.

I see my mistake i didn't subtract the .370 of the snap ring groove and end of the shaft . So 37.302 - 36.125 - .370 = .807 . I measure the flanges at .80 so these fit perfectly , i’m just dumb .

Lesson learned , don’t look at blue prints on a cell phone .

 

[peesalot]

Oh snap, I just saw a carrying error in the subtraction, didn't catch the stub & ring groove either.

 

[craptabulous]

Had a few minutes today to cut the bushings out of the spindles and instal seal retainers . They required almost 5 tonnes of pressure to instal , i added some sleeve retainer to prevent leaks.

 

[jim land]

For the DIY ,what about cutting a slice off an old knuckle , it could be use to make a conversion flange ,it would need a sleeve to fit the axle tube od , it could be a nice way to get spindle and caliper mounting holes

 

[cruisermatt]

For the DIY ,what about cutting a slice off an old knuckle , it could be use to make a conversion flange ,it would need a sleeve to fit the axle tube od , it could be a nice way to get spindle and caliper mounting holes

with how far digital quoting has come in the last few years having things like this made from scratch is easier and cheaper then ever.

 

[craptabulous]

Everything is mocked up , sent measurements off to rcv . I will see how the blueprint turns out .

The seals sit between 6.5” and 7.5” back from the outside of the rcv flange splines . Made for a 1.282 diameter shaft , the same size as the splines .

 

[craptabulous]

This is what rcv and I came up with . After giving them all the measurements in the world they told me that wasn’t necessary . These were the only measurements they needed and that they would make the flanges tight onto the ends of the shafts.

I was told 5-10 weeks build time . Hopefully i see them in a month or so .

Now i just need a set of brake calipers and pinion bearings to build the arb .