Topic: 4cyl 3rd in tacoma housing?

[79toy]

i was given a tacoma rear axle and i want to use it for the extra width.  but i have an arb in my axle already.  is it possible to put my 3rd member from my 4cyl axle into a tacoma axle?  what kind of mods would need to be done to the housing.

the big question...is it worth it?

[gotrocks]

I'm pretty sure you can't.  The tacoma axle is a 8.4" r/p not an 8" and the tacoma axle has a truss system that holds the carrier bearings together thats why there's a hump on the diff cover section and its not rounded.  The 8.4 is a stronger r/p as well.  If you already have an arb and am assuming gears I would just keep what you have since your already ahead of the game.  The 86-94 rear IFS axle housings are very close to the width of the tacoma and if you don't already have one I'd just run that for the added width.

[88_Pathy]

I thought that the e-locked Taco rear was still a 8in ring gear.

[gotrocks]

the e-locker is.  The regular tacoma is not.

[gotrocks]

I have both.

[dirtchicken]

It's still an 8" ring gear. As for the using the 4 cylinder 3rd in the Tacoma housing I wouldn't do it. The shafts are known to be weaker. I'd stick with an 86 and up housing.

[79toy [OP]]

yeah thats what i thought.  thanks for the info.

[Huhwhye]

the elocker also has different placement for the mounting studs on the driver's side.  It would require modification, like drilling and tapping 2 new holes, and you would be missing one all together.  Reverse of what I am doing to put an elocker in a regular V6 housing.  Not worth the trouble.

[Huhwhye]

This is what a V6 housing modified for an elocker looks like.  Borrowed from www.sonoransteel.com

[79coyotefrg]

It's still an 8" ring gear. As for the using the 4 cylinder 3rd in the Tacoma housing I wouldn't do it. The shafts are known to be weaker. I'd stick with an 86 and up housing.

only the tacoma elocker  is a 8 inch ring gear
the non elocker  tacoma  diff is a 8.4

[gotrocks]

only the tacoma elocker  is a 8 inch ring gear
the non elocker  tacoma  diff is a 8.4

Thank you glen for confirming my info.  Like I said above I have both I know what I'm talking about.

[dirtchicken]

You guys are wrong. Sorry.
http://www.pirate4x4.com/forum/showthread.php?s=&threadid=228681

[gotrocks]

the whole point is of what I've been saying is NO THEY AREN'T INTERCHANGABLE.  The 8.4 WON'T FIT in a IFS housing.  Just like the e-locker won't fit.  THEY ARE different.  I don't care if the actual size is still 8 inch.  They are still not the same and therefore won't fit.  If you don't believe me than read again what Brian Elinger said. 

"Now the MYTH cleared up. The 8.25/8.4, whatever is not. It is a 8" gear. The casting is better still. The carrier bearings are shimmed, rather than screw in adjusters. The ring gear has 12 bolts instead of 10. Also, the carrier bearing caps are connected with "girdles" and are cast as one piece. This diff I will simply call the late model v6. The pinion shaft is larger, the bearings are slightly lager and the casting is beefier than earlier versions. However, THE RING GEAR IS NO LARGER THAN EALIER 8" DIFFS! "

[ZUK]

i was given a tacoma rear axle and i want to use it for the extra width.  but i have an arb in my axle already.  is it possible to put my 3rd member from my 4cyl axle into a tacoma axle?  what kind of mods would need to be done to the housing.

the big question...is it worth it?

...."is it possible to put my 3rd member from my 4cyl axle into a tacoma axle?"

My curiousity was up so I just did some measuring with the dial calipers and I was pleasantly surprised how similar the "4 cyl" 3rd and the non-trd 3rds are dimensioned. see dimensions below

4 cylinder bolt pattern diameter----8.470
non-TRD  bolt pattern diameter----8.675

4 cylindermount surface to axle centerline----1.670"
non-Trd mount surface to axle centerline---- 1.670

The 10 bolt mounting patterns of both seem to be indexed the same meaning that if they could be swapped
that it would be "clocked " correctly (aligned straight up and down). By opening up the bolt pattern radius of the 4 cylinder carrier by about .100" and drilling for the next size larger stud, it should drop right in. No modding to the Taco housing itself.

And that's the only work required....to push the carrier hole outwards about .100"...there is plenty of metal still left on the carrier after that operation.

FYI ZUK

[snowrun]

I THINK...the stud size of the non-TRD axle housing is different. Not sure if the pattern is the same as the earlier diff housing.