42" tires on yota axle

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plfj40

plfj40

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planning to get new tires for the buggy this winter, so wanted to know if the any of you run 42 inch tires on minitruck axle without braking it every weekend. going to 42 because pitbulls 39.5 are like 16.5 wide and that's to wide i think, 42 is only 14.5 wide. thanks
 
Guys do it. Ive thought about it. Make sure they are fully built.
 
chromoly internals, forged R&P, and some gussets, and you'll have a pretty bulletproof axle.

For reference, 60-series and pickup axles are considered comparable to Dana 44's, the weakest link for a pickup is the diff, which can be swapped out for a beefier V6 assembly. Stock birfs have been able to handle bigger tires, but as soon as they get bound up, and you apply torque, BAM!

That said, any axle can break, I've seen Moser chromoly axles that have been spun by a 22RE crawler, and forged output shafts stripped of teeth by the same rig.
 
im not really worried about front axle, its a fj40 axle with longfields. the rear is out of a 94 pickup, so i might have to get some chromoly axle for that. any of you run trail gear rear axle shafts?
 
As a rule, I don't recommend TG products.
Not that their equipment is at all bad, but I disagree with the business practices and don't like their customer interaction track record.
Longfield and Moser are probably the axle types I'd recommend, but it's entirely up to you.
 
Need more info! motor? trans? gearing? t-cases? weight? wheeling style? rocks? mud? trails?

As said, its been done, you will break. But I wheeled for a long time with a 4runner on 42 Iroc's stock rear end, stock rear shafts, 4cyl 3rds, longs, chromo hub gears. It stayed together, but had a 400k mile 22re with maybe 50 hp. (he is Joez on the board) He also knew how to drive it to keep it together, no shock loading, etc...

I would not jump to chromo rear shafts just yet. He was on stockers and never broke them (they rarely break). I suspect it could have been due to their ability to twist 100*+ and come back. I would do a rear disc conversion and carry a spare in the beginning to see how the rear shafts hold up.

His truck was very impressive and stayed together quite well.

Ive gone through a lot of 8" 3rds and I still believe that the factory 4.88 v6 3rd could be the strongest of them all, maybe stronger than the high pinion. Could be the inherit beef, could be the toyota set up, could be the fact that once I pull them (for $100!!!!) from the junk yard they are nice and broke in....who knows, but Ive yet to break one, and I have never heard of one breaking. Don't get me wrong I'm sure they have been broken plenty, but its rare enough that I haven't stumbled on the claim.
 
I agree, to vague to provide an adquate response.

I've seen guys run those size tires for snow and never break a thing. It's all about perspective and right now there is none.

:grinpimp:
 
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engine 94-pickup-22re
trans-94-pickup- 5speed
t-case-doubler 2.8
front axle-fj40 with longfields
fear axle-94 ifs pickup, stock shafts
r&p, yukon 5.29 f&r
locker- welded f&r
ben wheeling this buggy on the rocks whole year with the 39" mickey thompson baja claws of my landcruiser, they weigh about 140lb each (with rim) the 42 rockers are about 10 lb less than baja claws. never broke anything with those heavy tires, and they get good traction to, so i would think that lighter tire will put less stress on the axle.
 
plfj40 said:
engine 94-pickup-22re
trans-94-pickup- 5speed
t-case-doubler 2.8
front axle-fj40 with longfields
fear axle-94 ifs pickup, stock shafts
r&p, yukon 5.29 f&r
locker- welded f&r
ben wheeling this buggy on the rocks whole year with the 39" mickey thompson baja claws of my landcruiser, they weigh about 140lb each (with rim) the 42 rockers are about 10 lb less than baja claws. never broke anything with those heavy tires, and they get good traction to, so i would think that lighter tire will put less stress on the axle.
Click to expand...

Other than the "yukon 5.29 rear R&P", I'd run it. :grinpimp:
 
I and many I know have had bad "luck" with them. I never blew a set up while hammering on them off road...but all three sets I destroyed literally crumbled. they would get a weird texture, then would begin to chip apart over time. A friend of mine had the same thing happen to him a couple years earlier.
 
Don't 5.29's have the least direct contact between the pinion and ring gear, as well?
I remember reading something to the nature of that.
 
Combat Chuck said:
Don't 5.29's have the least direct contact between the pinion and ring gear, as well?
I remember reading something to the nature of that.
Click to expand...

Im not sure about that, or how one gear ratio could have that as an inherit flaw over another. There are debates about the size of the pinion. The pinion gets smaller as the ratio gets lower. Ive never really subscribed to that being a problem. ZUK wrote a good article disputing the myth of the 5.71's being weaker.

I think that the big killer of gears (assuming the setup is proper etc....) is carrier deflection.
 
Zuks article...

571 gear strength

I consider Zuk to be as good as anyone when it comes to Toyota diffs
 
Combat Chuck said:
interesting read.
I appreciate the info and correction.
:beer:
Click to expand...

I'm not sure its a correction. Just another look on things. There are several theories about what happens inside a 3rd member....many are wrong. :grinpimp:
 
I had no idea Yukons were so weak. I wonder if a person was to Cryo them if they would hold up better.

I was planning on going with Yukon when I regear and lock up. I think Marlin only sells Yukon gears, I will have to look into this more before I tells Marlin to build me new thirds.
 
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