rear arrma diff cups

[majin]

i am looking for some advice before i make the wrong purchase three or 4 times lol.
its about the cen f450 arrma center diff I'm throwing in.
its for a 6s system so the diff cups are 6s size.
but my axle cups take a 4mmshaft.
i was told the rear cup is a different size than the center?
so i should replace he center cups with rear cups. allowing me to use the 4mm shafts i have.
could someone help point me in the correct direcxtion so i dont order the wrong part, or know of a better option.

ARRMA Aluminum Center Diff Set, 50T 200K, ARA311118​

this is the diff need rear cups for
https://www.amazon.com/dp/B09QCXQTJD?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

 

[majin]

i guess I'm asking if the rear cup will fit on the center diff?

 

[9x19]

I'd need a clue, to find a clue, because I got no clue!

 

[Ramp addict]

V5 and V6 29mm diff case the answer is yes.
V4 and BLX (31mm diff case) I don't know.

 

[Ramp addict]

Now that I've had my dinner here's the full answer.

Arrma uses the same cups for the center as they do for the outdrives. Arrma makes 2 6s diff cases and the parts are not interchangeable.

V6, Big Rock, and any EXB use drive cups specific to the 29mm diff case.
Any 6s truck with the BLX label use drive cups specific to the 31mm diff case.

 

[majin]

Now that I've had my dinner here's the full answer.

Arrma uses the same cups for the center as they do for the outdrives. Arrma makes 2 6s diff cases and the parts are not interchangeable.

V6, Big Rock, and any EXB use drive cups specific to the 29mm diff case.
Any 6s truck with the BLX label use drive cups specific to the 31mm diff case.

how do i know which one i have?

https://www.arrma-rc.com/en/product/diff-outdrive-set/ARA310980.html
these should work correcxt?

 

[Ramp addict]

how do i know which one i have?

https://www.arrma-rc.com/en/product/diff-outdrive-set/ARA310980.html
these should work correcxt?

It's a ring gear that goes to a 29mm diff case. I don't know what size diff cases are in your truck so I can't answer your question.
What truck and V model is this all for? V1-V5 use 31mm cases, EXB, V6, and Big Rocks use 29mm cases. The ring gears are NOT interchangeable.

 

[majin]

It's a ring gear that goes to a 29mm diff case. I don't know what size diff cases are in your truck so I can't answer your question.
What truck and V model is this all for? V1-V5 use 31mm cases, EXB, V6, and Big Rocks use 29mm cases. The ring gears are NOT interchangeable.

its for a make believe lol
I'm taking the transmission out of the cen f450, replacing it with the arrma center diff instead. the new arrma diff cups wont accept my driveshafts. i can just get new driveshafts that fit the acenter diff, but then the dog bone wont fit into the axle cup,
radioactive ranch suggested i get a set of rear arrma diff cups as they are alledgedly trhe same diameter as the cen front and rear axle cups, all alledgedly 5mm.
but I've also had it suggested that any 6s dogbone thats the correct length should fit

"So I used a random 1/8 buggy dog bone. I tried to find the package but I can’t. If you have ability of a hobby store near you go there take the truck and grab random ones until they fit. I know that’s inconvenient and I apologize but that’s exactly what I did. My first “solution” was to weld on the edges of the dog bone to add to the size and help it stay and I lengthened it by welding another shaft to it but eventually the welds broke.
Any 1/8 scale dog bone will work brand doesn’t matte just have to find the right length or if you have a welder you can attempt to weld onto them to add size"

this was the suggestion of the person i got the idea from, but I'm dumb and easily confused. added he also stated he had to grind down the dogbones a little to make them fit. i dont have a grinder, but i have a dremmel? if thats what i have to do i guess ill try it, I'm just trying to find a more permnanent solution.