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***NOTE: ON SOME Axial trucks, the cross shaft for the planetary gears is long. If you can't slide your planetary gear shaft in the slot easily, please grind or file the edges of the shaft to be ROUND on the end, and not sharp square corners. Grind the shaft ends from this [ to this C ***
After building the EXO buggy from Axial Racing, it won't take long to realize that the weak link in the entire driveline system is going to be the differentials.... all 3 of them. GCM has the answer.
As you know, GCM Racing has been making bulletproof diffs for several years, and as soon as we began our EXO build, we saw the need for an upgrade here.
This unique diff kit is like no other on the market. We have turned years of diff upgrade experience right into this product and it shows.
We include 2 polished stainless steel shims for a good reason- to isolate the metal-on-metal friction between the output gears and the output bearing area. This allows much cooler bearings and longer life of all the internals. The new case has been machined perfectly to allow the use of these extra parts and give you the best diff possible.
Theres more! You will notice the side hole on the case. This is for no-removal oil fill-ups. It's a simple thing, but if your oil starts getting low in the diffs, it just won't perform the same. With this little side screw, you can simply remove, fill, and replace, and you are back on the track ready to go.
Each kit includes:
1- new billet machined diff cup
1- side set screw for fill-ups
2- outdrive gear shims
For a no-flex long lasting diff in your EXO, there's nothing available like the long engineered GCM Diff upgrade... made exactly for this buggy.
You will need to order 3 kits to do your complete EXO buggy. You will need ONE kit to do the front diff in the Axial Yeti 1/10 buggy. Each unit you order is one kit.
Assembly note #1. DO NOT USE THE INSIDE O-RING on the new diff cup side. Use only the OUTSIDE O-RING on the new diff cup.
Assembly note #2. READ THIS IF YOU USE AN OLD GASKET!!
Thanks to lovely Axial design, they used a compression paper gasket to seal the diff to the ring gear. Please keep in mind that the gasket easily compresses MORE than the thickness of both supplied internal shims, so if in fact you crank the heck out of the 4 attachment screws, you can overtighten the diff and make it seize up completely.
IF YOUR DIFF WAS ALREADY ASSEMBLED, YOU MAY ALREADY HAVE A CRUSHED PAPER GASKET AND YOUR NEW DIFF MAY BE TOO TIGHT.
If this is your situation, please get a new paper gasket (Axial # AX30385) or take out the internal diff shims. None of our diffs in all history are designed to be tight after assembly. It should be free running (without oil) and provide very little resistance between the diff cups.
Keep that in mind for your own assembly also. Make it tight, but don't crush the crap out of the gasket or the diff will be too tight.
Assembly note #3. ON SOME UNITS the cross shaft for the planetary gears is long. If you can't slide your planetary gear shaft in the slot easily, please grind or file the edges of the shaft to be ROUND on the end, and not sharp square corners. Grind the shaft ends from this [ to this C