Offshoreonly.com - Bravo XR gears

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I have been told by several end users who have tried the cryo gears that they don't seem to last any longer than regular stock gears,,just sayin that's their opinion

Quote:

Originally Posted by Keith Atlanta (Post 4776225)

Heres a list of what makes a difference in no specific order. Not in the list is the case itself, I swear they get tweaked after a lot of hours or wasting a set of gears. Seems like they last longer when its a newer, unmolested case without past failures.

Any rebuilder that does a decent job is going to add life but here are some upgrades that seemed to make a difference:
1. cryo gears
2. steel tower
3. bigger/more rigid aftermarket topcap
4. aftermarket bearings
5. 7/16 stud conversion on topcap (I think this helped a lot and cost next to nothing)

Whatever happened to the OSO guy that was going to start manufacturing their own XR gears out of some precious hardened space metal? Like 3 people have said this over the last 10 years but it never pulls through...

Agree with your #1-5, cases do fatigue out of service. Also a very in-expensive upgrade is to source early 2000s standard Bravo cases, I prefer the swept back, and convert them for upgraded XR internals. The cases of the standard Bravo are actually thicker than comparable year XR case.

Quote:

Originally Posted by 253 (Post 4776723)

I have been told by several end users who have tried the cryo gears that they don't seem to last any longer than regular stock gears,,just sayin that's their opinion

I can add some useless knowledge after having a few sets. There are a lot of things that impact the ability of cryo to extend life. If you throw gears in a build with bad assembly tolerances, and without stuff to make the case and tower more rigid (like 1-5), you wont see results. ...and I think that has happened to me. But my understanding cryo treating is like an egg shell, it only goes several microns deep. So it helps with wear, but not with shock. If you were to do deep cryo, it would make the teeth more brittle which is what you DONT want.

Quote:

Originally Posted by Keith Atlanta (Post 4776225)

I would also add a redesigned upper drive shaft. They are usually the reason the gears get toasted. The original bearing is a joke and the shafts start to flex and then snap at the oil hole. AADS has redesigned it and put in a larger bearing. AADS has bins filled with hundreds of broken shafts and all look exactly the same. His don't break.

Quote:

Originally Posted by ThisIsLivin (Post 4776894)

By saying the upper shaft, do you mean the clutch shaft? if so you are correct that is a weak spot for sure. AADS has some really nice shafts that flex and don't break. (to a point) I run the Max mods on my boat with all the HD brgs, Shafts, Full length tower, Cryo Gears, ... and have not had a breakage. I'm running a fair amount of HP at them and will run them at 5400 RPM for more then 15 min straight. Awesome job AADS