Savage CEN diff Mod- (Jesus Built My Differential)

[Finnster]

First time back in forever and I happened to see this. Try to answer some ?'s you have.

It should be noted that this mod is basically obsolete ever since HPI came out with thier bulletproof diff set a couple years ago. This was done to replace the old savage diffs which broke fairly easy. I think the HPI's diff are better as the ring and pinion are machined rather than cast metal like the CENs. The CENs were better than the OLD savage diffs since the teeth were so large, but the newer HPI diffs have the same size teeth, but in machined steel for ultimate strength.

That way, all this modding is not needed, the parts drop right in and easy to find.

If you really want to continue, I'll answer what I remem, but its been a while.

-Only the savage diff cups are used. The Cen ring gear only fits on the cen diff body and vice versa. You go one way or the other, can't mix and match unfortunately. The HPI diff cups are needed as the Xl and Flux had larger dogbones

-The screws were 3x10mm or 3x12mm. No kit needed, just regular pan head screws

-thought I had pix of the spiders in the OP, guess not. No idea on weights, but performance difference would be negligable. Think the CEN spiders are stronger, but not really worth the effort anymore. The HPI spiders look like any truggy spider you would see. I'm sure there are truggy spiders that could replace the HPI spiders if you really had a problem, but likely not needed.

[_paralyzed_]

Finn- I thought you went the way of the dinosaurs. Good to see you post, I hope life is going well for you.

My builds are going slow but plodding along.

Peace brotha!

[Aero]

hi finnster. the questions are for anyone who can answer too :) or add specs/pics

yes it may be to extend obsolete. but dont some people still upgrade to cen diffs ? the ring gear only has 26t vs27t so aren't these a bigger size/another pitch ? about those CEn input pinions, they surely lok like another type of teeth than their ring gear as well. am not too fond of their ring and pinion gear anyway..

i think the main idea/wish, was to have that CEN diff case fit onto savage ring gears. wondering if those cen cross pins would fit as well. as i have the savage diff, old and new(BP), they both have this alu alloy grey diff case, and actually i saw a broken one by foty. the CEN case seems better simply cos of easy of access when having two 'endbells', we could use xray m2.5x14mm pins in the 10t spiders, and much easier to shim the diff (rather than 'emptying the whole diff cup to shim the 10t spider gear inside the cup). the case itself looks stronger than the savage aloy diff cups.

as per your answer, that ain't gonna happen then. but will the cross pins fit a savage diff then ? probably not ? so the cen spider gears are lesswide and taller than savage gears ?

the 'diff cup' = diff output cup/out drive right, (cute kid has many names?) to use savage diff output instead or CEN, is this becoz the CEN outdrive is 8mm ID and not 9/11mm?

is it a rumour or true that hot bodies d8 spider gears are harder than savage spider gears ? they look just the same. do anyone know what buggy spiders gears would be a preferred upgrade ?

i have a mutilator diff, that i got an alu (novaRC) cup for, and had to drill a set screw hole to fit the pin inside the spider in the cup. the orig. plastic cup had this. the savage diff aloy cup is rounded off such way that there really isnt room for a set screw hole (would weaken cup alot). is novarc closed btw?

can anyone recommend an upgrade diff cup for savage ?

ill try make some comparison pics of savage dif parts and ofna/hobao mutilator diff, perhaps theres some interesting to conclude, perhaps not..