SC10 gear diff in a B4?
 

Has anyone tried this for high traction tracks?

I know you neet the T-plate, the diff itself and the gearbox housing to fit it all. Just wondering if anyone had thought of this before as well...

You also require a set of outer bearings to go round the diff as the B4 ones are too small.

Good to know!

cheers

I was thinking about trying this out at some point. If you give it a go, please let me know how you get on!

VERY interesting!!! Any more info in this? Pics?

I ran a geared diff in my B4 at Bury on Sunday. It was a bit noisy to begin with but now its alot better. I will run it each week now indoors at Formby and Bury and outside at Southport when we get the chance.

How did it compare to the ball diff?

It felt just the same to me! but what I will do is get someone 'better' to drive it around the track and see what they think.

Can anyone please list the parts no # needed?

Pretty sure I have it right:

9827 - Geared Differential Set
9826 - Transmission Casing for Gear Diff
9818 - Rear Chassis Brace/T-Plate
NA - 10x16x5mm Bearings x2

Then the grease or silicone oil of your choice, if you intend use it.

Thx! What viscosity of oil is recommended?

I use 1000wt oil as that is what was recomended to me by MK racing.

Seems ok to me!

The instructions talk about just using black grease so I presume either is fine.

I tried 1 000cps but found it too thick (as I was racing on indoor slippy stuff), so I put TL 30WT shock oil (roughly like 500cps) and it felt really good.

I have heard most people run the AE black grease in the gear diffs as they leak quite a bit using diff oils.

Grease
 

The black grease is recommended in the associated manual for the new B4.1

Base plates are out of stock at the moment as I have got every component bar the plate :(

Try Model World in Maidstone, they have all the bits for the Conversion

You can dremel a B4 base plate so the new gearbox fits

I tried my SC10 diff in my B4 today at Bury indoors and I was impressed. I ran the diff as RTR (no oil, just black grease) and the car didn't 'diff out' at all which was a nice suprise and the handling was very close to the ball diff. The only thing that seemed to be effected was the low speed turn in which made the car tend to be a bit keener to clip the apex but I wouldn't say it was anything bad, just different.

I'd say Bury is a medium grip track and I'll also be trying it at York indoor (Polished floor + carpet), Rossendale (Carpet) and a local polished floor track so I should get a good idea of how it performs. I have a feeling the biggest gain will be on the polished floor track but its all to try :).

Just Finish putting mine in the b4 so you better be right MRD or I will give that facebook bird your phone number :woot:

Don't go there Nick, Its not going well :lol:.

Dont buy it!

ON slippery tracks on 6 min run time its between 10-15 sec slower than with ball diff.

I tested a lot of things with the gear diff, but nothing works well as a ball diff in 2wd

In 4wd especially durango it works better because the gear diff cant slip and you can use thicker oils to tune it.

But in 2wd, except on carpet, you are slower with the gear diff.

brgds
Andi

I took out whatever oil I had in mine and replaced it with Ansman diff grease, and literally spooned it in!

Worked ok, I cant say if its any quicker or not I am just running it to see if its any less work for us lazy types.

Other point is that even though its Ae are metric the screws to keep teh diff together are metric.

Thx for that input! :thumbsup:

I expected this would be the case... great for new beginner though, much easier do deal with than a ball diff.

And should be OK for 4WD on high grip tracks as you say.

But:
Then, what is the problem?

As mentioned before, The B4 geardiff leaks too much.

the problem is, that in 2wd the diff should set "light and smooth, that is very important - so thicker oil like 5000 cst is undriveable for 2wd, i tested afrom 25 to 50 wt damper silicon oil, and 50 was very critic to drive.

We use torsen diff in 1/8 scale buggy, thats a tuned gear diff with "diff lock". That would be an opportunity, but to expensive for 1/10 scale racing.

Trust me, in 2WD the ball diff is much better than gear diff. So AE team driver use the ball diff in the SC10, because it s faster.

bearing size
 

The bearing needed for this tranny part number listed above is ASC9832. Its not 5mm thick. But it is 10 x 16. I ordered the parts list mentioned above. Everything worked except the bearings. Now it will be right!.. after I re-order bearings.