WCD said:

In that case, do it. Two posi's are better than one.:top:

Click to expand...

well im sure i wouldn't get 2 posi's out of the deal, a new one would be nice though..

having never been inside a differential before, how hard is this mod? i've been all over these trucks with drop kits and other mods, but nothing inside the diff. or drivetrain other than short shifters..

im not sure of a differential shop around here that would be on my list of shops to trust for this..

Not insanely difficult, it will just take some time to get the 3rd member out of there. You have to pull the axles first, then the driveline. After that, the 3rd member unbolts.
From there, it just a matter of taking the LSD case out and remembering where everything goes. Be sure to mark the case cap with a punch, but it might already be marked anyway with paint for when you put it back on. These 3rd members have two thick shims that are used to preload the bearings on the LSD. Just remember where those go or label them left and right for when you put it back together. After that, the LSD case unbolts and then you can just follow the pics. :top:
Can you get a guy from a dealer to help? He could do the whole thing anyway if he wanted to. You're not messing with the ring & pinion setup or bearing preload so it would be pretty easy.

I'll have more pics in the future to give people a better idea of what I'm talking about. :top:

sorry if i sound retarded but, i recently bought a 05 xr and was wondering if they come stock with a lsd? mine seems like a 1 tire fire most of the time. and if it does will this shim kit fix my problem?

First of all welcome to XRU

Yes our trucks come with an LSD but some have problems with it i dont. This should fix your problem.

But please keep in mind that this is not an easy process. if you mess up your rear end could lock up.

Man, it takes a pair to open that up. :adore: Give me a set a plans and the pipe to do it and I'll install a fire sprinkler system in a high rise, but opening up a diff, clutch or tranny....heck no! :stupid:

i am in the process of getting my LSD replaced as we speak. When I turn at slow speeds, only in neutral my LSD clicks and bangs. Wont do it with the clutch in or in gear, only in neutral, and it doesnt do it when its cold. I have already put over $70 in fluids in it, dealer said they will just order me a new one. I have 19K miles btw. Also apparently no one has ever had this happen, I know all my friends XR's dont do it.

BSPX said:

i am in the process of getting my LSD replaced as we speak. When I turn at slow speeds, only in neutral my LSD clicks and bangs. Wont do it with the clutch in or in gear, only in neutral, and it doesnt do it when its cold. I have already put over $70 in fluids in it, dealer said they will just order me a new one. I have 19K miles btw. Also apparently no one has ever had this happen, I know all my friends XR's dont do it.

Click to expand...

Did it always do it, or did it start sometime later? That's weird that it won't do it in gear or when it's cold.

didnt always do it, it has gradually gotten worse. and yeah I know its weird, the dealer said the same thing, thats why they are just replacing it. it does the opposite of what bad clutches should do, so I dont know.

also get a pretty good drone now from the driveshaft and sometimes it bangs when you go into gear, like a bad u-joint or something.

Nice write up, But I gotta say that looks like one weak _ss differential, the spyder gear support looks like it's a ticking time bomb.

WCD said:

Not mine. This one had been laying around the shop for awhile. I'm guessing it was slipping, but those clutches have plenty of fiber left on them so it would be a good candidate for it.
Mine hooks pretty good right now, but if it starts slipping too much, I'll shim it up and let you know. :top:
Or I'll just put a true trac in it.
By the way, the same company that makes the TRD blower also makes our LSD. The Tacoma LSD is an Eaton positraction unit.

Click to expand...

maybe the broken teeth have someting to do with it being removed?

how do you know if it is sliping ?

Dallas said:

Nice write up, But I gotta say that looks like one weak _ss differential, the spyder gear support looks like it's a ticking time bomb.


maybe the broken teeth have someting to do with it being removed?

Click to expand...

IDK, but my lsd locked up while driving down the interstate. :thumpdown:
http://www.xr-underground.com/vb3/showthread.php?t=2263&highlight=differential

blazinx said:

how do you know if it is sliping ?

Click to expand...

somebody answer this question damn it!

slipping= 1 wheel peel

RESURECTION!

OK so the most helpful thing on this whole thread are the pics on the first page. Thank you.

Ok so im on my second LSD and its toast. I got the dealership to replace the LSD under warentee yay. Here is the crazy part. They dont just replace the LSD, they replace the entire rear end. It doesnt pay for them to setup the new diff so they just order the rear end and swap it. Plus that way if there was anything else going to break then it wouldnt come back for more warentee work.

The other part of this is that toyota doesnt list the Tacoma LSD as a servicable part or the part numbers for anything inside it. Now for the tundras with the 4.7 with an LSD its servicable and they list the clutch plates part numbers. Its the same 8" LSD. I found the clutch plate numbers by doing heavy parts lookup research on toyodiy.com and I'll post them later today on this thread. I like the Idea of shimming it up as the stock setting dont hold up for long, especially with my track usage. My question is how do you measure the pretension with the shims? How can I set it up to be like the Kazuma LSD with the 400lb pretension instead of the 200lb stock setting?

I'm not sure you can actually measure the preload. It should based on a calculation they do with the spring stiffness and the compression dictated by the shim thickness. So, assuming the springs are linear you would double the shim thickness to double the preload. Or you can always talk to the tech guys at the manufacture that builds the diff for Toyota and they can tell you exactly what you need.

LateOnTheBrakes said:

I'm not sure you can actually measure the preload. It should based on a calculation they do with the spring stiffness and the compression dictated by the shim thickness. So, assuming the springs are linear you would double the shim thickness to double the preload. Or you can always talk to the tech guys at the manufacture that builds the diff for Toyota and they can tell you exactly what you need.

Click to expand...

Actually, I take that back. That would only be true if the spring(s) are at its free length without the shims the housing doesn't compress it at all. Call a shop that does diff work or the manufacturer so they can tell you what you need for the type of driving you do.

Here's what you do email Ryan at vex performance and tell him you want the same os gieken LSD he sold me. Www.vexperformance.com

I rememebr my stock LSD alwyas clicking and banging. All of my friends though i had a some kind of race set 2 way....:laugh: My truck one tya fired all the damn time...

I had looked into this a while back, but when i pulled LSD out, the clutch plates where too far gone...120k miles:thumbdown: When i looked up replacement parts for it, i found nothing, just like Blue blaze, but didnt know about the 4.7l loop hole...Its some serious BS. So i went Lincoln-locker, and never looked back. 20k miles later...still loving it :top:

sdxrunner619 said:

I rememebr my stock LSD alwyas clicking and banging. All of my friends though i had a some kind of race set 2 way....:laugh: My truck one tya fired all the damn time...

I had looked into this a while back, but when i pulled LSD out, the clutch plates where too far gone...120k miles:thumbdown: When i looked up replacement parts for it, i found nothing, just like Blue blaze, but didnt know about the 4.7l loop hole...Its some serious BS. So i went Lincoln-locker, and never looked back. 20k miles later...still loving it :top:

Click to expand...

I hope you only drive in straight lines. Otherwise I see a broken diff and/or axle in your future.

I was considering the TRD clutch-type for my '09 and found a few part numbers for it. I see the name Kazuma thrown around but from what I can tell it was actually made by Eaton to Toyota's specifications and branded as a TRD part. With those part numbers you can contact Eaton or any of the differential experts and ask about shims or maybe heavier duty preload springs.

Eaton Part # 19614-010

TRD Part # 00646-41301-100