What year V6 toyota rear end for swap?

[2001XJ]

I have been searching around and looking at tech articles and I am trying to find a suitable rear end with a centered diff to get to work with my v8, TH400, Np205 combo. I can get a rear dana 44 out of a late 70s scout for $100 but I was thinking of going with the V-6 or turbo toy pickup rear end for more strength than the 44. All I can find are rear axles from 4 cyclinder pickups. Also, I wanted to know if there were certain years to look for in regards to the v6/turbos? Also, would a 1985 4 runner axle work?

thanks

 

[Downey]

I don't know that I would choose a V6 rear-end over a 4 cyl. rear-end for your particular application. Although the V6 rear-ends use larger bearings, the gears are no stronger (both 8"), and gear strength would be the potential problem, not bearings.
I'd question your wisdom on using a TH400 instead of a 700R4, unless the TH400 is just something you had laying around, bought and paid for? The 700R4 has a lower first gear, has an over-drive high gear, and is not so big/heavy/over-kill.

 

[Mace]

You mean an IFS rear? It would be wider than your stock front axle.

Better to just run a Non IFS rear (unless you have a wider front axle)

 

[2001XJ]

I don't know that I would choose a V6 rear-end over a 4 cyl. rear-end for your particular application. Although the V6 rear-ends use larger bearings, the gears are no stronger (both 8"), and gear strength would be the potential problem, not bearings.
I'd question your wisdom on using a TH400 instead of a 700R4, unless the TH400 is just something you had laying around, bought and paid for? The 700R4 has a lower first gear, has an over-drive high gear, and is not so big/heavy/over-kill.

sorry i meant to say 700r4, so what about the rear 85 4 runner rear end?

 

[Poser]

so what about the rear 85 4 runner rear end?

What about it?


Will be a centered diff, 8" ring gear, most likely a 4.10 ratio.

 

[bkfj40]

why not run a hybrid rear axle with a lc center section and the minitruck outers?


bk

 

[Jetboy]

If you want an exact gearing match you'll want a 79 -82 IIRC rear axle. They are 4.11 as compared to the later 4.10 gear sets. The paint mark on the pinion is an indication of ration. Pink = 41/10 (4.10) gear set; Orange = 37/9 (4.11) gear set. You can also look at the ratio numbers that are stamped on the ring gear.

FWIW there are really 3 different 8" diffs. The 4cyl, V6/turbo, and the later tacoma often mistakenly called an 8.4 (not sure why it's called that, the ring gear is the same size). The later tacoma is an even stronger casting and uses shimmed side bearings. IMO I'd go with an 79-85 if you have one available and see how the rear end holds up. They are fairly cheap to upgrade if you need.

 

[Mace]

If you want an exact gearing match you'll want a 79 -82 IIRC rear axle. They are 4.11 as compared to the later 4.10 gear sets. The paint mark on the pinion is an indication of ration. Pink = 41/10 (4.10) gear set; Orange = 37/9 (4.11) gear set. You can also look at the ratio numbers that are stamped on the ring gear.

FWIW there are really 3 different 8" diffs. The 4cyl, V6/turbo, and the later tacoma often mistakenly called an 8.4 (not sure why it's called that, the ring gear is the same size). The later tacoma is an even stronger casting and uses shimmed side bearings. IMO I'd go with an 79-85 if you have one available and see how the rear end holds up. They are fairly cheap to upgrade if you need.

4.11 and 4.10 are interchangeable..

Taco diffs have spanner side gear adjustment just like the older diffs do.

A shimmed side bearing is not a strength improvement.

 

[craptabulous]

just putting it out there but why not get a diff out of older a trd taco? your getting the axle it might as well have a electric locker in it .

 

[Jetboy]

4.11 and 4.10 are interchangeable..

Taco diffs have spanner side gear adjustment just like the older diffs do.

A shimmed side bearing is not a strength improvement.

I was assuming from that this was a shimmed setup. I don't see any threads or side gears. How are they adjusted?

 

[Mace]

I don't remember any shims in the taco Diff that I had, but I may be wrong.
I still do not see any strength additions with the shimmed side bearings. Just a different way of doing things.

 

[Jetboy]

I've never taken one apart. That's just what I've read. It seems like it would make the setup more difficult./time consuming, but I don't see any other reason for going that way. I've never heard of the bearings coming loose. I think I just read that somewhere.

I do like the idea of a single piece cast brace/bearing cap like they use. It doesn't seem like Toyota engineers do things for no reason and that diff seems to hold up very well under at least the v-6 power. I don't really hear of rear ends being an issue in the v8 4runners either which IIRC are just a standard v6 8" diff. The newer style is also used in the tundra right? I don't hear about issues with them either. I'm guessing they must be pretty strong and that extra bracing helps reduce any deflection in the ring gear or the housing.

Shims may just be easier/cheaper from a production standpoint?

It's too bad they made the bolt pattern different because it would be kinda nice to be able to put the stronger diff in a regular 8" housing.

 

[Mace]

14 bolts, Sterling axles (all one ton apps) use the adjustable "nut" on the carrier.

Dana seems to enjoy using the shims. I hate it, it SUCKS for setting up diffs.


That bearing cap support is awesome tho.

If you did a Diamond housing they could set it up mini width for a taco diff easily.

Pricy tho.

 

[Jetboy]

I've never had a diff failure. I guess I don't have any use for the additional strength at this point, plus I have landcruiser axles anyway. I do wonder what the strength comparison would be between one of these and a landcruiser diff. I could see it being stronger if the cause of most failures is due to deflection of the ring gear. I really don't see why a larger ring gear makes any substantial difference in overall strength other than bigger spider gears. I'd guess the housing size and structure along with bearing sizes have more to do with strength and potential for R&P failure.

 

[Letsgomoreplaces]

8" diff

I dont think I would put the 8" diff in the rear ov a v8 LC. It would be a serious step backward. Yes the "v6" diff has larger bearings, but still is an 8" ring gear. Dana 44 would also be a step backwards from the LC diff. You could pick up a 9.5" gm 14 bolt semi float w/ 6 lug axles. this would be a decent one and elockers are inexpensive for them. They will be wider than stock, but could be narrowed, or buy centered LC housing. If you're going with a toyota diff, you could also get a tacoma non-locking rear as shown in the pic posted previously. They used them in v8 tundras as well, not to say they held up well though. A locker would be a must as the 2 pinion carrier on these tend to go through spider gears pretty easily.

I have been searching around and looking at tech articles and I am trying to find a suitable rear end with a centered diff to get to work with my v8, TH400, Np205 combo. I can get a rear dana 44 out of a late 70s scout for $100 but I was thinking of going with the V-6 or turbo toy pickup rear end for more strength than the 44. All I can find are rear axles from 4 cyclinder pickups. Also, I wanted to know if there were certain years to look for in regards to the v6/turbos? Also, would a 1985 4 runner axle work?

thanks

 

[Vicm]

Why don't you make one out of toy truck rear axle and lc rear axle. There is a thread about that, I just couldn't find it.
Maybe someone else can;;;;;;;;;;