Seems like a reasonable way to go. A new OEM 8.2 housing is $1K and new 3.73 3rd member w/OEM elocker is around $1700-2K per my shopping around....might just go that route and keep 3.73 gears for now, then regear to 4.56 in the future to spread out the costs.
Builds GXOG: My 2003 GX470
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I guess if I ever break the 8" I'll be looking for something more stout. It is a tiny ring gear for such a heavy truck. A definite weak spot. But, I'll just run the 8 for now. In my jeep days the cj came with a oem 8 7/8" ring gear and a 2 piece axle shaft, with another spline out at the flanges. I put one piece shafts and a Detroit in there. Lots of guys were putting 9" out back and dana 44s up front. I ran 33s and didn't push it hard or beat the thing up and it never broke. That jeep was all over Moab, several years at Easter safari, choke cherry and other technical trails, including one up in Northern California..
I feel Im in this camp…not overloaded, 32.7” tires, medium difficult trails at he most, removed 2nd and 3rd row seats, carry all gear inside cargo area…and praying the 8” rear diff holds
By the way, is it possible to just upgrade the rear housing to an 8.2” diff? Or the whole axle has to be replaced?
3rd member also has to be replaced, which is where the extra beef really is. From my research it appears that the axle shafts, wheel bearings, brakes, etc from the 8" are a direct swap to the 8.2". I was surprised how inexpensive the new parts are from Toyota. Used 8.2's seem to be $3K unlocked and up to $4K with an elocker around here....cheaper to go new.
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- #966
Have to replace the housing. But for you? Just grab front and rear out of a 460 with the CVs, etc. You get the 3.91 gearing and ATRAC and everything else works and it bolts right up (unless you have a 470 with KDSS or you want to keep a sway bar).
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- #967
I wish it was on purpose. We won't speak of this again
Is it possible to cut off the 470 swaybar mounts and weld them into the 460 8.2? This seems like it could be a slightly cheaper option than a new Toyota 8.2 housing (and allow the old 8" to be sold as a complete unit) but I would not be willing to loose the rear swaybar to make it happen. I have a non-KDSS 470. Not sure if the configuration of the 8.2 housing overall would allow this to occur or not.Have to replace the housing. But for you? Just grab front and rear out of a 460 with the CVs, etc. You get the 3.91 gearing and ATRAC and everything else works and it bolts right up (unless you have a 470 with KDSS or you want to keep a sway bar).
Yeah…I want to keep the rear HD sway bar…but it attaches at two points to the axle so it doesn’t seem that difficult to weld new brackets. Someone did that recently IIRC
Also, there’s a post somewhere that lists the various options for a beefier rear diff…I need to find that post since it had good info in terms of gear ratios, mods needed, etc
Looks like a used 460 8.2 rear is still $1700-$2K. Not as cost effective considering a new 5th-gen T4R OEM housing and TRD OR elocker 3rd member are both around $3K plus tax.
Rear Axle Housing Assembly #42110-60A81 | Autoparts.toyota.com
Ensure optimal vehicle performance with a genuine Toyota Rear Axle Housing Assembly. Protects your axle, enhances longevity, and minimizes costly repairs.
autoparts.bommaritotoyota.net
Wish the local salvage yards had this stuff cheaper....
I suppose most junk yards know about supply and demand for the 8.2 rear axles….
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- #972
Don't worry, I got my transfer case front output seal all fixed without incident
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- #974
Trucks will be hauled not driven in the fall. Going to do the easy way to give the wife some rest pre-race. Not even sure we are making it up your way as we will likely drive I-10 back. Plus, you know how to do that! Get to work!Wanna help Me with mine when you roll thru?
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- #975
Another update! We installed Califab rear shock conversion kits and replaced the icon top caps with stems for the eyelet version. The conversion allows you to run eyelet and move the shock out a bit so you don't hit the frame and the stem to eyelet also relieves the torque on the shock that often twists the shock or strips the top stem out of the shock top cap. Pretty elegant and nice looking solution (Wife's was first so this pic is her shock)
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- #977
Long travel. If you don't use a limit strap it can allow the shock body to make contact with the bottom edge of the frame at full droop and torque the top stem.
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- #978
Doing some clean up on HP. Got a leaky ARB line to the rear locker fixed (exhaust touched it) and about to cut out more of the rear bumper to make more room for the 37s. Also going to cut and retack the welds on the front fender supports (wife is going to weld them). ALSO decided to finally fix the rear panhard bar rubbing on the diamond with a JKS panhard from ECGS that they use and supply spacers for (it is a Jeep panhard).
Nice that you have a welder in the house!
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- #980
I love that she is learning to weld. I plan to improve my welding as it has been a few years. We have a lot of welding to do on the BJ60 haha
