ring and pinion question (1 Viewer)

[mookie]

does anyone know if aftermarket R&P sets are stronger or made with higher quality metals than factory? or which brand in particular is the highest quality?

i broke a front pinion last weekend (on the first obstacle i got on no less after driving 4 freaking hours) so anyway i am planning on sending two sets of R&P's to Mr. Longfield for cryo treatment and just was wondering if it would be better to send some aftermarket ones instead of the stocks?

 

[Mace]

No real better aftermarket R&P's out there.

cryo is your friend..

 

[CruisinFJ60]

No real better aftermarket R&P's out there.

cryo is your friend..

how much stronger does the CRYO make them? cause i know there is some of a trade off with they become more brittle (i think) or less flexible.
and i know some flex or ability to take the shock is wanted ect like how axle shafts have twist to them.

i think i just confused myself with that but hopefully you get what im thinking and cant type.

 

[mookie]

i remember seeing an interview a while back with the owner of all-pro and he claimed that aftermarket R&P's are stronger than stock because they have more nickle content than stock.....maybe he was just trying to pimp his product....and i didn't know that the R&P was designed to have any flex?

 

[CruisinFJ60]

i remember seeing an interview a while back with the owner of all-pro and he claimed that aftermarket R&P's are stronger than stock because they have more nickle content than stock.....maybe he was just trying to pimp his product....and i didn't know that the R&P was designed to have any flex?

well metal is malleable so to some degree it will flex and absorb shock

 

[Poser]

i broke a front pinion last weekend (on the first obstacle i got on no less after driving 4 freaking hours)

Why did the pinion fail?



Cryogenically treating a ring and pinion set will not prevent the pinion from twisting off when the drive shaft binds up.

 

[mookie]

was trying to bump over something and hit it too hard and the front end took a big bounce, the d-shaft didn't hit anything

 

[too tall]

I would be hesitant to cryo the gears . I had a friend get Bobby to do it a few months ago ,then after two trailrides they started to fall apart . Hairline cracks everywhere and galling on the teeth . When he called Bobby he got no help at all . Since then he has installed two new sets of gears and hasn't had any issues since . I'd be more inclined to think it was axle wrap that broke your pinion . I beat on my junk harder than anyone else I have ever seen and I haven't had any issues with pinions other than toasting the bearings . I guess it depends on your tire size and engine but I believe they are quite strong . Have you broken any other major parts yet ?

 

[Mace]

was trying to bump over something and hit it too hard and the front end took a big bounce, the d-shaft didn't hit anything

No DS bind at all? Pic of the yoke?

I would be hesitant to cryo the gears . I had a friend get Bobby to do it a few months ago ,then after two trailrides they started to fall apart . Hairline cracks everywhere and galling on the teeth . When he called Bobby he got no help at all . Since then he has installed two new sets of gears and hasn't had any issues since . I'd be more inclined to think it was axle wrap that broke your pinion . I beat on my junk harder than anyone else I have ever seen and I haven't had any issues with pinions other than toasting the bearings . I guess it depends on your tire size and engine but I believe they are quite strong . Have you broken any other major parts yet ?

I'd like to know the exact conversation that he had with Bobby..

Cryo will not cause hairline cracks or galling of the teeth on the pinion/ringear

 

[too tall]

I'm not exactly sure of the wording in the conversation but he purchased two new sets of ring and pinions . Had them shipped to Bobby for cryo . Got them back , installed them then a couple of runs later drained the oil and found lots of particles so he tore them down and found his R&P's were disintegrating . I know for a fact that Bobby didn't help him out with a solution but the supplier who he bought them from came through and replaced them . I believe they were the same brand . If you are really interested in the exact conversation I could see if I could get my friend to register on here and elaborate . Not trying to hi-jack this thread but what do you think would cause this type of failure in a gearset ? The only obvious variable difference is the cryoing .

 

[Isotel]

Bobby is one of the most stand up vendors out there, who stands behind his products..

Gears are not Easy to install, a bad install is way too common for anyone to warranty. I doubt any gear vendor will warrenty their product unless they installed the gears themselves.


Fine Spline Pinion that broke?
I have had Good luck with Stock Toyota OEM 4:11's in my rig.. id love some more gearing, but ive had such good luck, i dont want to change it.

 

[mookie]

I would be hesitant to cryo the gears . I had a friend get Bobby to do it a few months ago ,then after two trailrides they started to fall apart . Hairline cracks everywhere and galling on the teeth . When he called Bobby he got no help at all . Since then he has installed two new sets of gears and hasn't had any issues since . I'd be more inclined to think it was axle wrap that broke your pinion . I beat on my junk harder than anyone else I have ever seen and I haven't had any issues with pinions other than toasting the bearings . I guess it depends on your tire size and engine but I believe they are quite strong . Have you broken any other major parts yet ?

i've actually heard a very similar story of this happening to a guy who had them cryo'd locally, that's why i was planning on sending them all the way to Longfield........i've gotta say that i'm finding myself dreaming of a set of 14 bolts these days....one of my friends is building a steering 14 so i'm real interested to see how that turns out

i've broken pretty much every major part available on my rig now but this is the first front pinion in 3-4 years of heavyduty wheeling, i'm pretty sure it wasn't axle wrap.....

i sure would like to hear from someone who has had a GOOD experience with cryoing their gear set before i do it.....it sure is a HELL of a lot of work to tear both axles all the way down for unknown results

 

[bustanutley]

Sounds like a soft spring drive shaft bindage problem rather than a pinion strength issue to me. If you would have done the same thing with a d60 I guarantee you would have taken out a u-joint on your d-shaft. You need some sort of wrap control. If it is coarse spline and you twisted it off put a fine one in. Pics of the break would have diagnose the problem.

If fine spline and no axle wrap in the front, you will bust teeth before the pinion gives.