Kraton Nasty noise from center differential

[Ktc888]

Sound like the centre diff

I have had it all apart. Teeth are all perfect (checked it over and over again)

Thought it might be the pinion slipping on the motor but it's nice and tight

Opened up the diff. All cogs inside are great

Any suggestions would be appriciated

 

[hobo]

crown gear and pinion need changing there worn out and slipping

on rear or front

 

[Ktc888]

They look brand new on inspection

 

[bicketybam]

They look brand new on inspection

You might have to do a process of elimination. I start my removing both front and rear diffs and seeing if the noise is still there when you power it up on a stand. Inspect both the front and rear pinion gears to make sure they are spinning freely. Then I would put one of the diffs back and repeat the process. All if this with the truck on a stand the the wheels off the ground. See if you can narrow it down to where the issue is. Real hard to tell from your video.

 

[Ktc888]

You might have to do a process of elimination. I start my removing both front and rear diffs and seeing if the noise is still there when you power it up on a stand. Inspect both the front and rear pinion gears to make sure they are spinning freely. Then I would put one of the diffs back and repeat the process. All if this with the truck on a stand the the wheels off the ground. See if you can narrow it down to where the issue is. Real hard to tell from your video.

I'm finding it hard to find the issue myself and it's right in front of my lol. Basically I removed the front diff and noise has stopped but still can't see 1 issue with it. Teeth are all brilliant I have inspected everything. I have also shimmer it to see if that works but nothing

 

[joostin420]

Did you rebuild all 3x diffs?

 

[Ktc888]

Did you rebuild all 3x diffs?

No haven't rebuilt any just opened them up to inspect the teeth on all the cogs. The car isn't very old everything seems fine

 

[hobo]

its just my outcast sounded like that when my ring and pinion were worn out

 

[joostin420]

Maybe one of the cross pins for the output drive cups under the front crown gear has sheared.

 

[Ktc888]

its just my outcast sounded like that when my ring and pinion were worn out

Pics from my centre diff. I'm no expert but those don't look like they need replacing yet

 

[slick2500]

If you removed the front diff and the noise stopped, it's the front diff. The center diff is irrelevant now as you have already pinned down that it is the front and not the center. Let us see some pics of the crown and pinion gear for the front diff.

 

[Ktc888]

If you removed the front diff and the noise stopped, it's the front diff. The center diff is irrelevant now as you have already pinned down that it is the front and not the center. Let us see some pics of the crown and pinion gear for the front diff.

The noise also stops when I remove just the rear diff and leave the front in

 

[bicketybam]

Leave the front and rear differential in. Pull the center, remove the front and rear dogbones and reinstall the center. Run the motor and see what kind of noise you have.

 

[Ktc888]

Think I have finally found the issue.

Took the front diff out the casing and the bearing has dropped out. Smashed up

Can't find 1 ball out the bearing lol

I think there was a huge amount of movement in the pinion (no support from the bearing)

Will replace tomorrow and let you all no ?

 

[slick2500]

Think I have finally found the issue.

Took the front diff out the casing and the bearing has dropped out. Smashed up

Can't find 1 ball out the bearing lol

I think there was a huge amount of movement in the pinion (no support from the bearing)

Will replace tomorrow and let you all no ?

Replace your stock bearings with rubber sealed bearings asap.

 

[bicketybam]

Replace your stock bearings with rubber sealed bearings asap.

That’s the first thing I do with every RTR vehicle that I buy. It should be tops on everybody’s list.

 

[slick2500]

That’s the first thing I do with every RTR vehicle that I buy. It should be tops on everybody’s list.

I do this for vehicles that come with bushings or metal shielded bearings.

 

[bicketybam]

I do this for vehicles that come with bushings or metal shielded bearings.

Every RTR I've ever bought comes with pretty poopy bearings.

 

[Ktc888]

Are you guys on about these??

 

[paulybatz]

People love the fast eddies bearings.