Solid Axle Swap BS Thread

Why not just toss in a 9.5" FJ80 rear axle? You'd be plenty good then. Make sure the FJ60 front is stuffed with chromos and 6 stud knuckles like I already said.

 

FWIW, a Dana 60 ring gear is 9.75" in diameter. Not much different than your 9.5". Once you upgrade, you will have Japanese 1 tons

 

People automatically assume the Toyota stuff sucks, and one needs 60s to wheel and when you break it down it really does not/you do not. The fj 60 front has just about the same size diameter front ring gear, the chromo axles are basically the same size as stock 60, and even some upgraded shafts. The only real advantage the 60 stuff has is you can upgrade it to 35 splines, but then your talking big $$$ big HP and big tires, and yes you will then start blowing transfer case parts up. I would keep the land crusier axle, focus on beefing up the tcase, and looking for a 9.5" rear axle (fj80s are nice in a taco and non elocked ones are cheap). I will take blowing up axle parts all day over grenadeing transfer case parts. You can strip parts off the axle enough to get it back to the trailer or even home, you blow the main shaft on the transfer case, you just about screwed.

 

My friend Paul a long time ago had a 98 Taco with the TRD rear axle and 32" tires. Never ran anything bigger and he shredded the teeth off the ring and pinion. Nearly everyone I wheeled with some time ago blew up TRD rear ends and swapped the non-TRD in its place.

 

Everyone breaks shit, doesn't mean they all going to fail. I've seen people break 60s too by barely doing shit on 37s.

 

Thanks for all the tips fellas. I actually know where I can get an fj80 rear actually but isn't the diff offset? Wouldn't that mean I need a double cardon on the rear drive shaft? Would the stock shafts in the 80 rear suffice? I like the idea of Japanese 1 tons... It would be different since everyone does tons. The t case is def something I'm worried about since it's all 21 spline but to go 23 spline if have to get a new adapter along with the gears

 

What about a rear TRD with chromos?

 

It's not really the shafts that is the problem, more as the ring gear is the issue. Do they make chromo shafts for those axles? I've never looked, dumped mine so quickly.

 

What about deep cryo treating the ring gear?

 

I have been wheeling one on 255/85s with a crawler since 2007, no issues. I like the rear end, its getting swapped out for an 80 rear since i hate drum brakes. Its going to live its life in a dual cased 4runner on 33's after i swap it out. That axle worked evreytime i needed it and it was one the parts i worried the least about.

 

https://www.trail-gear.com/TG/4340_...ts/i_0_0_3521/_141042-1-KIT.aspx#.VQxHZNLF--k

 

the tacoma has a 65" rear driveshaft, i think the offset diff is not an issue . There has been a few people running them with no issue, im hopefully going to swap mine in this weekend. You will sheer the hub studs before breaking an axle, even then nitro makes chromo shafts for them. There a 10mm hub stud upgrade, search ih8mud and pirate 4x4 there's write-ups how to do that. FWIW i have a friend running 40s on his fj80 and he has yet to sheer a stock hub stud, and he has the upgraded shafts. The other advantage is factory discs and a working parking brake. Added bonus your front diff will work in the rear (non elocked), you only need one spare, or you can limp it home if you blow one up.

I would address you tcase. Who told you need new gears and an adapter?!?!? The only thing i can think of someone went cheap and got a trail gear adapter for the crawl box, if that's the case that should get thrown in the garbage anyway. Trail gears spline pattern is not the same as marlins for some reason.

IF it marlins all you need is 2 new 23 total spline inputs from marlin one of those inputs will have to match the 4.7's you have, a crawl box "coupler" (main shaft for the crawl box) and a coupler to mate the male to male inputs on the trans. Are you sure its not already 23spline? That seems really weird to go from 23spline at the trans down to 21spline where the crawl box meets the tcase. While you have the credit card out, pick up the 30spline output kits for the rear cases from marlin. I have them on my lefty and they are sweet, beef for sure.

 

You got a lemon! Lol

You don't need a new adapter with gears. Marlin makes a 23 spline 2.28 geared input. Literally pull the 21 spline out and swap in the 23. Done. If you have Trail Gear shit, well, I feel bad for you son! I got 99 problems and Trail Gear isn't one!

 

I say that sarcastically all the time! According to the internets this thing should have blown leaving the bay at discount tire after i put my 33's on it... Yoshi the gear setup guy at the factory must have been on his A game the day he setup my third!

The only parts i buy from trail gear are sliders, they work great for the price and they are hard to screw up. It would be more expensive for me to make them lol.

 

Yeah hard parts like sliders and bumpers are hard to beat but anything mechanical, stay far away! I bought their steering shaft for axle swapped trucks and the u-joints were absolute SHIT. Had radial play in the u-joints which would most definitely be felt in the steering wheel down a fire road.

 

I've destroyed 3 ring and pinions on my TRD rear end... One on stock tires and 2 on 255/85's... The stock one was on stock tires, the 2nd one was an all OEM Toyota parts setup by a local mechanic, and the last one was 4.88's set up by ECGS.

But somehow I can't break a CV axle with the front locked...

 

Yup!!! I would not put anything they make in my drivetrain. The six shooters are supposed to be nice though.

 

any one looking to experiment with a TRD rear end I have a complete axel out of my 05. I upgraded to a 60. the axel is in really good shape with nearly new 4.88 cryo treated R&P gears…did I mention it is the 2 set since I have had it?

but I was on 37s

 

I like tossing this picture around. Note the massive girdles connecting the bearing caps on the non-TRD third member. And the "8.4" actually isn't 8.4. It has an 8" ring gear like the rest of em.