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Discussion Starter · #1 ·
I got my SM420 and the back has a yolk or some type of u shaped mount for what looks like a huge ujoint. The shaft also does not look like it is long enough to mount the adapter plate and tcase to. The TH400 that I took out had a huge spud shaft that went all the way through the tcase and was held on by a nut just inside the cone, how does this thing mount? I have read directions on extreme bends and seen pictures of adapters, but does that shaft not go all the way through the tcase? Anyone have pictures of when theirs was done? How about pics of how the shaft and adapter and tcase all work together? The directions on extreme bends read to me like the entire tcase is just held on by the end of the shaft and the washer that is bent over, is this right? So the rear bearing and cone area are not used? Do I still mount it with the rear AA mount that is bolted on with the cone? This did make sense before I saw the "yolk" or whatever it is on the rear of the SM420, now it does not seem right. Please help. I need to get my adapter and get this thing together now. It has been parked for way too long.

David <IMG SRC="smilies/usa.gif" border="0">
 

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Dude, that yoke comes off. Go to IH8MUD.COM, you should be able to find the information you need.

The rear of the SM420 will be flat with the 10 spline output shaft sticking out only, no Yoke.
 

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You want to not only pull the yolk but the rear bearing cover as well.

If you are going to use the "plate type adaptor", like the Warden's it will bolt up to the tranny in place of that rear bearing cover. The small amount of shaft that sticks out is enough to catch the gear inside your 3-speed t-case. The spline count on the SM420 output shaft matches the input spline count on the gear.

BTW with the plate adaptor you are going to loose the other gear, the one intended to drive the PTO.

The standard set up for a cross member is like the Advance Adaptors type that attaches to the rear of the T-Case. This will give you the neccessary support.
 

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And when you have the t-case bolted up the the plate adapter you will find that the input gear will be approx. 3/16' shy of the end of the output shaft of the trans. This is the way that it is. If you get the Wardens kit the washer already has a pin that fits into one of the splines of the o/put shaft that locks it into position. Study the extreme bends info and when you actually start the installion you will find it goes very easy. <IMG SRC="smilies/bounce.gif" border="0"> <IMG SRC="smilies/bounce2.gif" border="0">
 

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Discussion Starter · #5 ·
Thanks guys, that is pretty much what I thought but I just wanted to make sure I understood it correctly. I read and reread the extreme bends installation and will check out the IH8MUD site.

David <IMG SRC="smilies/usa.gif" border="0">
 

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Discussion Starter · #6 ·
Can I use the stock drivelines with this swap or do I have to have them made? I have drivelines from a 4spd setup as well as from a 3spd setup and also from an automatic setup. I am hoping to be able to use one of the sets and not have to spend too much more money.

David <IMG SRC="smilies/usa.gif" border="0">
 

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If you still cant figure it out then call your friend Jason...His Landcruiser is operational and you could maybe just ride along with him next Rubithon....lol...whats up dude...
 

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Originally posted by crawlin:
<STRONG>Can I use the stock drivelines with this swap or do I have to have them made? I have drivelines from a 4spd setup as well as from a 3spd setup and also from an automatic setup. I am hoping to be able to use one of the sets and not have to spend too much more money.

David <IMG SRC="smilies/usa.gif" border="0"></STRONG>
Mine went back together with the stock drivelines. Of course that was when it was spring under...
That is one of the advantages of doin the SM420 with the plate adaptor, your T-Case will end up pretty close to the same place.
If you where to use the AA adaptor you'd be into some driveline length changes.
 
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