Question about the new (to me) underdrive bevel gear set

[Master Basher]

I went to change the rear out to an underdrive and I found that the new gears don't have the loading pins like the old ones did. This doesn't seem nearly as well made. Am I missing something here? I don't want to depend on the four tiny 1.5mm (or whatever they are) gear bolts to transmit all the force of the drive to the axles.

What needs to be done here? Is there some new upgraded part that I am missing?

Thanks

[jpf]

this looks good to go on the locker, or you could change the locker with a spool

[Master Basher]

Originally Posted by jpf

this looks good to go on the locker, or you could change the locker with a spool

did you notice the two pins in the one on the left? They take all the twisting force and allow those tiny little screws to do nothing other than hold the plastic dif case to the gear. Am I supposed to trust that the drive pins are not necessary any more?

This spool maker has included holes for the drive pins. Are the drive pins not that big of an issue? I've run these stockers since I got the rig back in '08 this way.

http://www.rccrawler.com/forum/axles...-fi-spool.html

[ROWDY RACING]

The screws hold just fine, non issue, only the shitty stock pot metal gears have those pins.

[Master Basher]

Originally Posted by ROWDY RACING

The screws hold just fine, non issue, only the shitty stock pot metal gears have those pins.

thanks, I doubted the screws for power transmission, but if you say it works fine I'll not worry about it.

[Johnnysplits]

I haven't used the pins either...no problems.

[ROWDY RACING]

Originally Posted by Master Basher

thanks, I doubted the screws for power transmission, but if you say it works fine I'll not worry about it.

Knock on wood, I have never seen it be an issue.

[winnerone23]

Ur good to go man. The 4 screw's will do just fine.. Loctite them in an forget about it.
Them 4 little screw's hold lots of gears together in crawlers and Big powered rock bouncers.

[Master Basher]

^loctite dont work on plastic yo.

[TSK]

Those pins take no load. They are there to locate/center the spider gear shaft in the diff housing when running an open diff.

[ROWDY RACING]

Originally Posted by Master Basher

^loctite dont work on plastic yo.

What's plastic yo? Those stock lockers are a joke.

[Master Basher]

Originally Posted by TheSCorpionKing

Those pins take no load. They are there to locate/center the spider gear shaft in the diff housing when running an open diff.

They take all the load while doing so.

[Master Basher]

Originally Posted by ROWDY RACING

What's plastic yo? Those stock lockers are a joke.

Theyve kept both my axles locked since '08 with no issues.

[winnerone23]

^^ Crawl much!?

I kid I kid.. I ran my stock axle ring, pinion, an lockers for 2 years.. The 2nd year was 4s on a 35t, 16t an even brushless, before I up graded.. Some get lucky and they hold up.. But the slop is Horrible!

[rcmedic]

Originally Posted by winnerone23

^^ Crawl much!?

I kid I kid.. I ran my stock axle ring, pinion, an lockers for 2 years.. The 2nd year was 4s on a 35t, 16t an even brushless, before I up graded.. Some get lucky and they hold up.. But the slop is Horrible!

I stripped a set of stock ring and pinions in one take off, then continued to trail, and they came back where the truck wouldn't propel its self on flat ground.

[BigSki]

Don't forget to use a new paper gasket between the spool and ring gear.

[Master Basher]

Originally Posted by BigSki

Don't forget to use a new paper gasket between the spool and ring gear.

I reused the one that was in it.

[djjiz]

Originally Posted by BigSki

Don't forget to use a new paper gasket between the spool and ring gear.

How important is this? I've never used one

[Master Basher]

Originally Posted by djjiz

How important is this? I've never used one

I noticed that with no gasket in place the case doesn't touch the ring gear because the stock locker is too thick. That would put even more bad forces on the 4 small screws holding the thing together. Ideally, the case touches the ring gear and the screws are torqued enough to utilize friction between the gear and the case to turn the diff. Even more ideally, the "locating" pins fit snugly into the locating holes and take all the force. The plastic case holes are too sloppy for this to occur (imho), but a metal locker (aftermarket) may be made like this.

I would say it is important to have the case half screwed tightly to the ring gear, and my diff wouldn't do that without a gasket. Otherwise, the screws (tiny little things too) are subject to the torque and will break eventually.