Toyota Aisin Manual Hub 101 - SFA vs IFS

**waskillywabbit** · 07-09-2009, 08:00 PM

Toyota Aisin manual hubs are a nice upgrade over ADD and auto hubs found on various Toyota 4x4s, 79-95. During this time period you have solid front axles (SFA) on pickups and 4Runners, and independent front suspensions (IFS) on the same. I am talking strictly about these years and models. There are numerous other Aisin manual hubs and many of those parts are useful as well.

SFA on the left, IFS on the right in the pictures

The red dials are interchangeable on various types of Aisins, with one noticeable difference that disinguishes the SFA dial on the left, it has a raised and curved "handle" for easier gripping. Since the dials are interechangeable do not always assume what kind of hub you have without looking at several factors that distinguish the two, as mentioned below. I have purchased quite a few Aisins that folks thought were IFS and actually turned out to be SFA, thus I got them on the cheap and was pleasantly surprised.

The black face is the same on the SFA and IFS and are easily interchangeable as are the hub dial o-ring, and the little ball and spring located in the little hole on the dials. If you decide to clean your Aisins and disassemble them, be careful not to lose the little ball and spring. The number one thing missing on Aisins I purchase are these items, thus the reason I found a source for them so I could replace them.

The big springs are all the same, but you must install them correctly. Here is the difference.

This is flat side up

This is flat side down

You want to install the spring flat side down towards the clutch (see below).

The clutch spring mechanism is interchangeable but the clutches themselves are different, and different enough that you can't put the SFA one in the IFS, but it will work vice versa, due to the height difference. I don't swap them myself as it can cause issues of fitment in certain instances. SFA is on the left and taller than the IFS one on the right.

The biggest difference is the hub gear, SFA is 30 spline and the IFS is 26 spline, yep I counted them. While interchangeable in the hub assembly, they are not usable if swapped due to clearances and fitments. Examing the hub from the backside of the flange and seeing the hub gear splines and the difference in the recession on the face of the flange is the sure fire way to tell the difference as to what type of Toyota Aisin manual hub you have. SFA is on the left and shallower, IFS on the right and deeper.

Here is the thread how to reassemble your Aisin Manual Hubs.
http://www.yotatech.com/f123/toyota-...sembly-186334/

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**waskillywabbit** · 07-09-2009, 08:12 PM

You can take a set of Aisin Manual Hubs, for any model, put in some time and effort and they can look and function new again. Here is a set I did a while back for a customer. The first picture is exactly how I got them in the box after I took all the pieces and parts out.

Here is how I sent them back to him.

Obviously a different picture (date) but you get the idea.

GenXr · 07-09-2009, 08:22 PM

This thread deserves to be made a sticky!

toyospearo · 07-10-2009, 06:42 AM

THOSE hubs look familiar

07-09-2009, 08:12 PM	#2 (permalink)
waskillywabbit Super Moderator-Sponsoring Member Staff Join Date: Jul 2003 Location: Tuscaloosa, AL Posts: 14,548	You can take a set of Aisin Manual Hubs, for any model, put in some time and effort and they can look and function new again. Here is a set I did a while back for a customer. The first picture is exactly how I got them in the box after I took all the pieces and parts out. Here is how I sent them back to him. Obviously a different picture (date) but you get the idea. __________________ WabFab Off-Road, LLC MySpace Twitter Facebook 7th Annual South East 4Runner Jamboree, 2010 The toughest part of a Jeep is the chick driving it. WabFab Off-Road 4th Anniversary Sale

07-09-2009, 08:22 PM	#3 (permalink)
GenXr Registered User Join Date: Mar 2007 Location: Dayton, OH Posts: 558	This thread deserves to be made a sticky! __________________ Old Blue - 1995 Xtra Cab 4x4

07-10-2009, 06:42 AM	#4 (permalink)
toyospearo Registered User Join Date: May 2008 Location: way way nor cal Posts: 1,577	THOSE hubs look familiar __________________ 94 Ext. cab 22re Aussied, 4.88's, SAS,ed, FLATBED, Old Man Emu rear leafs w/TG 5.5" shackles, TG sliders, LC Header, Marlin super HD clutch, 32's- Swamper TSL's- RC rims, Badland Bumper, lifted, lighted, LED'ed, Warned, alternatored (LC High ouput), Hammed, gusseted, trussed, etc, etc... My build thread http://www.yotatech.com/f152/great-w...ck-sas-164531/ My Flatbed build thread http://www.yotatech.com/f88/toyospea...-build-191787/

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