Upcoming G6-01 tear down

[Dakratfink 726]

So, I took my King yellow off the shelf just to look it over today . It was already near dusk so I wasn’t even going to run it. Well, I noticed the center wheels spin freely like the diff is worn out. 
I guess a winter tear down is in order . Sigh 

[Dakratfink 726]

Well, if you can’t see the problem. The one on the left in the photo is the center diff. The other is the Rear for comparison. Notice the stripped out larger diameter ? 
that was my problem. 
the stripped part appears to me machined into the metal bevel gears of the diff.

I’m impressed at the plastic gears are all like new. 
I also noticed my aluminum kit pinion is very sharp and there is some metal dust. So I will be reassembling with a steel pinion. 
I also plan to go back to 2 wheel steering.

And the rear dog bones are twisted . Deciding if I can still run them , or a replace, B replace with universals

 

[Dakratfink 726]

[isomer1 158]

Interesting wear. What kind of power were you running to cause that?

[Greanie 16]

Why no rear steering? I was thinking of adding rear steer to my bus, but im on the fence. 

[OldSchoolRC1 673]

When I built my 6x6, I locked up the diffs with putty and knowing it was going to be beat on, I swapped in the "D shaped" gears and outputs. Those cast splines are usually pretty durable for me, but the D shaped ones are far stronger imo. 

Funny you say that about the plastic gears, I have some that are 30+ years old and have held up fine. I tend to wear out the pinions before the plastic gears. 

[Dakratfink 726]

3 hours ago, Greanie said:

Why no rear steering? I was thinking of adding rear steer to my bus, but im on the fence. 

15 turn brushed Dynamite on usually 2s Lipo , occasionally rare blast on 3 s 

[Dakratfink 726]

5 hours ago, Greanie said:

Why no rear steering? I was thinking of adding rear steer to my bus, but im on the fence. 

Mainly just for simplicity of adjustment and higher speed stability . I am on the fence, however. I may still keep the rear steer. 

[Dakratfink 726]

On 10/17/2021 at 7:07 AM, OldSchoolRC1 said:

 

When I built my 6x6, I locked up the diffs with putty and knowing it was going to be beat on, I swapped in the "D shaped" gears and outputs. Those cast splines are usually pretty durable for me, but the D shaped ones are far stronger imo

 

I was thinking about this when I ordered parts last night , but I inspected the splines themselves very carefully and only the insert in the bevel gear was worn, the out drives were fine so I opted not to order all new gear sets and out-drives X3, only replace the damaged ones  It’s not a bad idea to swap to the D shaped ones though.

To me the funny thing is . The Rear diff got enough stress to twist the dog bones but no slippage or wear on those splines. I wonder if the inside center wheel lifts and spins out more under hard turning ?