Kraton Kraton GPM Bevel &Pinion gears

Jtfaulkner · Feb 23, 2019

Has anybody tried out these gears made by gpm? Supposedly #45 hardened steel.
Any luck? Please let me know
Thanks

slick2500 · Feb 23, 2019

Gears are straight cut not spiral cut.
No one that I know of has been brave enough to try them.
GPM parts are hit or miss. Diff cups so far seem to be the best thing they make, however I have seen a few guys that have had the gears eat the inside of the diff cup. @Reubydoobe had his do it.

Pfaulk54271 · Feb 25, 2019

Pfaulk54271 · Mar 23, 2019

Everyone is running stock gears and happy!?
I am having horrible luck with mine, stripping ring gears all the time...not sure what to do at this point.

slick2500 · Mar 24, 2019

Pfaulk54271 said:
Everyone is running stock gears and happy!?
I am having horrible luck with mine, stripping ring gears all the time...not sure what to do at this point.

I'm running stock gears and only ring a s crown gear I have lost in the past year and a half was from a bearing going bad.
There are a few things that can cause issues, improper shimming, too big tires, too heavy weight oil in the diffs or defects in the diff case.

Jimbobjr · Mar 24, 2019

FYI the gpm gears are spiral cut not straight as mention. Their website has pictures of them. They are not cheap though. I can get a whole assembled diff from JRC for the price of just the gears...

slick2500 · Mar 24, 2019

Jimbobjr said:
FYI the gpm gears are spiral cut not straight as mention. Their website has pictures of them. They are not cheap though. I can get a whole assembled diff from JRC for the price of just the gears...

Unless they updated the pictures the ones I saw were straight cut. And knowing the quality of their other parts I just don't trust them.

Jimbobjr · Mar 25, 2019

I can’t past a pic but look at the second pic. Clearly spiral cut. https://www.gpmparts.com/arrma-krat...pinion-10t-2pc-set-gpm-mak1043ts-p-12101.html

PowerDubs · Mar 25, 2019

Notorious J · Mar 25, 2019

Don't want to barge in on this thread, but is everyone here shimming the outside of the bearing on the crown side? Newer models already have these installed, but older versions did not. 13 x 16 x 0.15. One seems to do the trick to keep the crown pressed into the pinion. Also, if the pinion is still on original bearings, there could be a lot of play.

slick2500 · Mar 25, 2019

I have 2 shims on my front and 3 on the rear.

slick2500 · Mar 29, 2019

Im going to go out on a limb and say these things are not very good. I haven't even seen an Arrma crown gear stripped that bad.

iLikeRCs · May 3, 2019

slick2500 said:
Im going to go out on a limb and say these things are not very good. I haven't even seen an Arrma crown gear stripped that bad.
View attachment 34054

was that a gpm gear???

martysmith223 · May 3, 2019

Notorious J said:
Don't want to barge in on this thread, but is everyone here shimming the outside of the bearing on the crown side? Newer models already have these installed, but older versions did not. 13 x 16 x 0.15. One seems to do the trick to keep the crown pressed into the pinion. Also, if the pinion is still on original bearings, there could be a lot of play.

what the heck is in your gearbox dirt lol

Notorious J · May 3, 2019

martysmith223 said:
what the heck is in your gearbox dirt lol

Outside, dif case, pinion bearing. Replaced all mine with sealed for longevity

martysmith223 · May 3, 2019

Notorious J said:
Outside, dif case, pinion bearing. Replaced all mine with sealed for longevity

I'm talking about this brown grey stuff all over your diff case is that dirt lol

Notorious J · May 3, 2019

martysmith223 said:
I'm talking about this brown grey stuff all over your diff case is that dirt lol

That's not mine lol! I think that's the OP's dif case. Mine are shiny with just a touch of grease. ?

martysmith223 said:
I'm talking about this brown grey stuff all over your diff case is that dirt lol

Wait, how did that photo get attached to my post? Wasn't me @martysmith223

Notorious J said:
That's not mine lol! I think that's the OP's dif case. Mine are shiny with just a touch of grease. ?

Wait, how did that photo get attached to my post? Wasn't me @martysmith223

Wait again! I think I "borrowed" that pic from the interwebs to point out where the shim went that I was talking about. Excuse: I'm old

martysmith223 · May 3, 2019

Notorious J said:
That's not mine lol! I think that's the OP's dif case. Mine are shiny with just a touch of grease. ?

Wait, how did that photo get attached to my post? Wasn't me @martysmith223

Wait again! I think I "borrowed" that pic from the interwebs to point out where the shim went that I was talking about. Excuse: I'm old

I feel bad for anyone's diff looking like that lol wtf that's that dirty lube special

olds97_lss · May 3, 2019

martysmith223 said:
I feel bad for anyone's diff looking like that lol wtf that's that dirty lube special

If I hadn't seen that on another thread, I would have thought someone went nutty with graphite lube. Pretty sure it's all dirt/silt though.

martysmith223 · May 3, 2019

olds97_lss said:
If I hadn't seen that on another thread, I would have thought someone went nutty with graphite lube. Pretty sure it's all dirt/silt though.

yeah I'm guessing a crack in the gearbox case or a loose screw holding it down

Kraton Kraton GPM Bevel &Pinion gears

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Anything will break if you drive it wrong enough.

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It's gonna break, so might as well send it!

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Anything will break if you drive it wrong enough.

Anything will break if you drive it wrong enough.

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It's gonna break, so might as well send it!

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It's gonna break, so might as well send it!

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Bash Break Repeat!

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