Locking hubs

[R.K.]

What is the difference betwwen the solid axle locking hubs and the IFS hubs? I know they look similar, and parts of them will interchange.

Will an IFS hub gear fit onto the splined end of a birfield? I'm asking because I've got a pair of hubs that came on a solid axle, but the dials are fluch with the end of the cap. I thought the IFS hubs were the only ones with the foush dials.

 

[KLF]

Will an IFS hub gear fit onto the splined end of a birfield?

Nope. That's the primary difference, the spline count is different.

Our fearless leader Jerod has a very detailed write-up on here about rebuilding the AISIN hubs, perhaps his article has the specifics in it, or he'll jump in here and elaborate.

 

[foxfab]

Hub body and dials are the same.

The internal hub gear spline count is different but both are interchangable. solid axle is 30 spline, IFS is 27 spline.

 

[pappy]

Hub body and dials are the same.

Actually, the bodies are different. The IFS hubs are more concave/recessed. Cover/handle/clutch assembly is the same. Other internals are interchangeable, except for the gear. As said, 30-spline vs. 27-spline.

 

[2ndGenToyotaFan]

Hey! Glad to see you guys don't need me around! Don't forget we have 2 fearless leaders now, and Pappy has been fearlessly leading a lot longer than me. Plus he's the man, so....

I think the Solid axle hub body is deeper...

 

[pappy]

I think the Solid axle hub body is deeper...

Someplace I have pics that show the difference. If I can't find them I have an IFS hub in the garage and I can pull the hub off the FJ40 and take side-by-side pics. I would really like to find my old pics though because they show the difference between the solid axle vs. IFS vs. Tacoma hubs.

 

[knixen]

The ifs hubs are deeper, so you won`t get the c-clip on. Don`t think the spline count is different. Had no trouble until trying to get the c-clip on... Worked like a MF to get the axle further out, thinking that was the problem... Until I spotted the problem...

It is very easy to change the gears, which is the only difference. One large c-clip.

 

[pappy]

Numbers:

Gear face from backside: SA = .16", IFS = .32"
Gear face from frontside: SA = .78", IFS = .73"
Gear face from frontside, SA gear in IFS body = .63"
Hub body, SA and IFS = 1.80"
IFS gear = .76"
SA gear = .86"

In other words, the gear is more recessed from the back on the IFS hub, and this clearly shows in the pics. From the front of the SA hub, the gear is further toward the Birfield which is why the snap ring fits with SA hubs and not IFS hubs.

Three pictures. Hub on the left is SA, hub on right IFS.

First pic is the exploded view of the parts.
Second pic is of the backside of the hub bodies.
Third pic is looking down from the front side and you can see the difference between the 30-spline SA gear and the 26-spline IFS gear.

 

[knixen]

Numbers:

Gear face from backside: SA = .16", IFS = .32"
Gear face from frontside: SA = .78", IFS = .73"
Gear face from frontside, SA gear in IFS body = .63"
Hub body, SA and IFS = 1.80"
IFS gear = .76"
SA gear = .86"

In other words, the gear is more recessed from the back on the IFS hub, and this clearly shows in the pics. From the front of the SA hub, the gear is further toward the Birfield which is why the snap ring fits with SA hubs and not IFS hubs.

Three pictures. Hub on the left is SA, hub on right IFS.

First pic is the exploded view of the parts.
Second pic is of the backside of the hub bodies.
Third pic is looking down from the front side and you can see the difference between the 30-spline SA gear and the 26-spline IFS gear.

Thats right, now I remember... Changed the gears, and it still wouldnt fit... Needed the casing to... My bad!