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You're assuming I haven't diagnosed the problem.
I have sprung a leak that I would guess is due to the seal wearing into the softer metal of the shaft.
^x2; only the wear surfaces are hardened. (The ends)No offense but you should do some triaging and disassembly before just assuming your seals are bad because they wore out your axle shaft... its possible of course but seals wear out too and afaik the axle shaft is just a run of the mill 4340
^x3
No not according to RCV or Bobby Long, when I talked to Bobby about the original Longfield superset made by RCV, he was very careful to explain exactly how Longfields got their strength. Go watch any of his axle break videos or look at the data and you can see how much deflection the upgraded axles take, they are softer to twist not shatter.
PRODUCT / ................................................. FT.LB. TORQUE/.... % TWIST
Yukon 4340 Dana 60 35 spline short side axle.........12,000 ..................130
Stock Dana 60 35 spline short side axle .................6,500 ....................35
Yukon 4340 Dana 44 30 spline short side axle ..........5,800 ...................35
Stock dana 44 30 spline........................................5,00 0.....................35
Yukon 4340 Birfield Eliminator kit (ear failure)............5,500......................50
Longfield 4340 30 spline (shaft failure)......................8,500............... ......175
Longfield 4340 27 spline........................................6,50 0.....................75
Stock Toyota Birfield.......................................... ..4,200 .....................45
Stock Toyota Inner Axle.......................................5,000 .....................45
175* twist compared to 45*
Not only is my set not 4340 "We have gone a step further by upgrading the inner shafts to 300M" They entire shaft is not case/thru hardened to the same rockwell as OEM.
So the problem with trail gear is birf click or ???? I have several things from them and never had an issue, but never bought a machined part from them. I can get dealer cost on trail gear, but thats only 150-200 less than other companies, so id rather have a better part instead of something that will need constant attention or annoying quirks.
Any other issues with them?
Iv wheeling the long fields for 6+ months on 40s without a single problem, don’t know why people bash them so much.
FWIW, last year I order rcv’s from who, I can’t remember but they screwed up my order because my RCV’s came directly from RCV but the vender also sent me a set of trail gear shafts.
I could not tell a difference between the rcv stub shafts and the rcv stub shafts excepting they didn’t have RCV written on them. The difference that was obvious was the thinner inner shaft had standard splines whereas, the rcv’s I ordered were the 30/30/30 spline version.
My rig is part time so wear will never be something I can comment on.
Ok so everyone should stay away from TG!That was true for a few months. That is no longer true. RCV does not make Trail Gear shafts or birfs any longer. They only did while Trail Gear was setting up production overseas.
Ok so everyone should stay away from TG!
Well I know many people have questioned longevity with upgraded birfs with the softer heat treating in a Fulltime 4wd truck. I had heard Bobby Long say they are good for 60,000 miles. I didn't think anything of it since at the time I was maybe driving my truck 5-8000 miles a year. Fast Forward to 4 years later, 2 trips across the country north to south and two trips across the country east to west a lot of daily driving and somewhere around 50,000ish miles. I have sprung a leak that I would guess is due to the seal wearing into the softer metal of the shaft.
Just an FYI for those of us using our trucks to sight see malls more than wheel you could save a little money on the RCV 300m superset. lol.
24 spline is a different diametrical pitch btwSo....reading through this and having not yet torn into the axles of my '94 with 275K mi on it, got me to thinking (that's usually dangerous and/or expensive...lol). I'm thinking, going with 5.29s for my own reasons, and the oem 30 - 24 spline neckdown on the front axles is a weak point. I'm trying to upgrade for strength running larger tires and pulling an off road trailer for overlanding. The stock 9.5" & rear axles should be fine. Noticed on the rcv website a warning: "Some trimming may be required depending on the application". What are they talking about? Any other tips when replacing oem with these? I'm keeping the full time setup for now. Being that they're "using only high-strength chromoly materials" is this a bad idea for longevity? I've heard that chromoly is best used on a part time setup, where they're not spining constantly.