Main input gear rear diff

[Typhon6smax]

Hi guys,

How should the fitment of this input be? Do i need to put the drive cup all the way onto the main input gear? Should it have a little play?

 

[Lazy Bushman]

Looks like you got it right?

 

[Justintime]

All the way. If there is play it can push into diff cup and chew it up. You can shim it if you need to.

 

[Lazy Bushman]

There is a flat spot on the shaft. If you have play then your grub screw isn’t tight

 

[Typhon6smax]

Looks like you got it right?

Also, should you hear a kind of rattling noise when the input gear drives the crown gear?

 

[Lazy Bushman]

Nope. Are you sure the rattle is coming from it? Just to be sure you’re not talking about the rattle and play coming from the rear driveshaft into the cup are you? Sorry for asking. Make sure your not missing any teeth on either of the gears (the large spur and input)

 

[Typhon6smax]

Nope. Are you sure the rattle is coming from it? Just to be sure you’re not talking about the rattle and play coming from the rear driveshaft into the cup are you? Sorry for asking. Make sure your not missing any teeth on either of the gears (the large spur and input)

No, i have the rear end loose. I was replacing the diff. But it makes this metal-to-metal sound when I spin it.

Nope. Are you sure the rattle is coming from it? Just to be sure you’re not talking about the rattle and play coming from the rear driveshaft into the cup are you? Sorry for asking. Make sure your not missing any teeth on either of the gears (the large spur and input)

I also don't have driveshafts connected. The gearbox is still open.

 

[Lazy Bushman]

You will feel the teeth meshing on the diff particularly with lighter oil. At best you may get a low vibration feel or hum but no clacking or rattling sound

 

[Typhon6smax]

Nope. Are you sure the rattle is coming from it? Just to be sure you’re not talking about the rattle and play coming from the rear driveshaft into the cup are you? Sorry for asking. Make sure your not missing any teeth on either of the gears (the large spur and input)

Can I contact you on Instagram or something? I can send you a video of what is happening. My instagram is @6s_max send me a dm

 

[Lazy Bushman]

Sorry I don’t have instagram...no idea how to...i’m still learning YouTube and Facebook?. You can post video here somehow or a YouTube link, but it’s getting later here (for me anyway) so i’ Off to bed, but America is probably waking from its slumber and one of the other guys will prob help in the meantime

 

[Typhon6smax]

Sorry I don’t have instagram...no idea how to...i’m still learning YouTube and Facebook?. You can post video here somehow or a YouTube link, but it’s getting later here (for me anyway) so i’ Off to bed, but America is probably waking from its slumber and one of the other guys will prob help in the meantime

Oh ok, well thanks for your help anyway. Have a goodnight ??

 

[Reubydoobe]

Can I contact you on Instagram or something? I can send you a video of what is happening. My instagram is @6s_max send me a dm

Send it to me ill have a look buddy. I've seen you in Instagram ?
Sorted, don't you just love the Internet. Arrma worldwide assistance club right here ????

 

[Lride Chart]

Hi guys,

How should the fitment of this input be? Do i need to put the drive cup all the way onto the main input gear? Should it have a little play?View attachment 45814

Looks right to me. I usually turn the bulkhead over with the diff cup on and give the input gear a couple taps with a socket extension and a rubber mallet to ensure the diff cup is set. Check the spin and make sure no slop, if slop repeat. Then some loctite and the grub screw.