HPI Savage Diff Information

[WoodiE]

Below are some very useful information about how to shim the diff and transmission of your HPI Savage monster truck as well as the parts to use do the shimming.

Kyosho 8x10mm diff shim kit

Diff shimming 101

Shims for Savage Diff and Transmission

Savage Diff Oil Weight

Interior diff shim?

Differential weight explained

If you have wondered how different diff oil thickness or thinness effects your rear, center, and front diffs then the below chart should help you out.

 

[bildad]

How much oil do you fill the diffs with?

 

[olds97_lss]

How much oil do you fill the diffs with?

Usually up to the cross bar so that when you drop in the top sun gear, not much oozes out, if any.

 

[WoodiE]

Just added a diff weight chart to the first post, hope someone finds it useful.

 

[bifftit]

lol.......
I use Mobile1 20/50 synthetic in all my gearboxes.
If its good enough to keep my harley lubed, its good enough to keep my savages lubed
AND its cheaper than RC lube

 

[ez2frag]

Has anyone tried these gears in the Savage 25 differentials? HD Steel Spiral Cut Diff Ring / Pinion Gear 8T/26T for HPI Savage X 4.6

 

[Goose1072]

They don't work, I have a set for my Flux and could not get them to work.

 

[Goose1072]

View attachment 8708View attachment 8709I have a new opened and un-opened set of HD Steel Spiral Cut Diff Ring / Pinion Gear 8T/26T for the Savage for sale.

 

[Mattsavage92]

I have a savage flux xl... When I hit the throttle it's only "grabbing" on the right side and burns out side ways.... So checked all the grub screws and drive shafts.... All fine! So I took the rear end off and when I put my fingers on each side of the differential and twist where the drive shaft goes everything turns like it should?? But when I try to "GO" only the one side is grabbing?? Anyone have ANY ideas??😭

 

[Jam 1]

I have a savage flux xl... When I hit the throttle it's only "grabbing" on the right side and burns out side ways.... So checked all the grub screws and drive shafts.... All fine! So I took the rear end off and when I put my fingers on each side of the differential and twist where the drive shaft goes everything turns like it should?? But when I try to "GO" only the one side is grabbing?? Anyone have ANY ideas??😭

sounds like the bevel gear in the diff gave it up. only way to know for sure is to tear it down and examine all the parts

 

[Mattsavage92]

Ok I have the rear end out and the a arms off just haven't cracked it open yet... From the bottom all of the teeth look good but I will try to tear it open today! Thank you!

 

[Mattsavage92]

Ok.. uh so its definitely The bevel gear as you can see it snapped right in half but my question now is why is the oil in my diff so THICK!? is it supposed to be?? Like it feels like glue?? Please help! 😭

 

[guinnessdublin]

In a word Yes, search diff oil information on here it’s great! 😂👍🏻

 

[Mattsavage92]

It's like glue tho! Lol I know it's supposed to be thick but this is like slime? Idk how to explain it... Nor have a ever done the maintenance like I should have... But I was told to get 50k diff grease? Is that right?