Grease and DIFF fluid questions

[Izzwardo]

Hey guys I have a 4s Outcast that I am putting back together and I need to know how much grease to put on the crown gear and how much differential oil to put in the metal gears. These plastic gears are horrible and I have stripped 2 of them out and the housing that holds it all together broke as well. I am hoping for a good upgrade for these parts as I only have about 3 hours of run time on this truckSorry I don’t know all of the right names.

 

[jondilly1974]

Hey guys I have a 4s Outcast that I am putting back together and I need to know how much grease to put on the crown gear and how much differential oil to put in the metal gears. These plastic gears are horrible and I have stripped 2 of them out and the housing that holds it all together broke as well. I am hoping for a good upgrade for these parts as I only have about 3 hours of run time on this truckSorry I don’t know all of the right names.

You need to fill the diff cup all the way. Some might spill out as you close it up, but the max fill is your goal.

As far as grease, you don’t need to fill the yoke, but a good amount for sure. I don’t think there is a too much other than wasting material.

As far as the yoke, there are aftermarket metal ones. They should hold up better.

HR Racing Alum Yoke

 

[Izzwardo]

You need to fill the diff cup all the way. Some might spill out as you close it up, but the max fill is your goal.

As far as grease, you don’t need to fill the yoke, but a good amount for sure. I don’t think there is a too much other than wasting material.

As far as the yoke, there are aftermarket metal ones. They should hold up better.

HR Racing Alum Yoke

Ok great thanks! How tight do I put the diff screws back in where the diff fluid goes? the local hobby shop told me not tight at all Is that true? And I was told the metal gears will be available in a month or so hopefully not that long. Thanks for the help!

 

[jondilly1974]

Ok great thanks! How tight do I put the diff screws back in where the diff fluid goes? the local hobby shop told me not tight at all Is that true? And I was told the metal gears will be available in a month or so hopefully not that long. Thanks for the help!

I’m not sure about the diff tightness advice you got. I would make sure everything is tight. Not stripped, but tight. Some blue loctite would ensure they stay in place.

 

[Izzwardo]

I’m not sure about the diff tightness advice you got. I would make sure everything is tight. Not stripped, but tight. Some blue loctite would ensure they stay in place.

Perfect thank you!

 

[Sledgehog]

Use a cross pattern when tightening the diff screws down. Like screw them all in so they are almost tight, then tighten top left, bottom right, top right, bottom left for example. Don't do one full side then the other. That way you're sure you're getting a proper seal.

 

[Izzwardo]

Hey guys I replaced the parts but when I put the 4 bolts back in the differential and I tighten them I can’t spin the metal shafts. Should I back the bolts off a bit till it moves ?