Hot Racing Arrma 6S 29mm Modular Aluminum Differential Case
About this part
Features:
- CNC machined 6061 aluminum
- Anodized black
- Light weight
- Steel pinion bushing for longevity
- O-ring for a better seal and reusability
- anodized black and Red
- Fits the front, center, or rear
- Replaces Arrma ARA310983 differential carrier
- Includes:
- (1) differential carrier
- (4) ring gear screws
- (4) diff cover screw
- (2) o-ring gasket (one already install. )
- Reused spider and output gears (From Arrma ARA310983), gaskets and o-rings, and ring/pinion
- Recommended to use medium thread lock on screws
- Do not over tighten
- Use only silicone diff lube
- Does NOT work with parts from Arrma ARA310433 or ARA220050 differential carrier
Reviews2.0 · 3 reviews
The screws Hot Racing supplies to mount the spur gear are countersunk at a steeper angle than the spur gear is meant for. This causes the screw heads to stick out and rub against the motor mount. I replaced the Hot Racing screws with standard RC spec countersink screws and that solved the problem. As it sits in my truck now it spins freely and rubs against nothing. 5 stars for quality of construction. -3 stars for having to dig through my junk screw collection to make it work. Total stars 2. I like the diff case and recommend it. I also recommend a package of 3x10mm countersink screws to go with it. Stock Arrma diff screws are too long and bottom out.
Do not buy this diff case for your kraton exb or other exb with the 29mm case! I've wasted hours on this as when I fit it back in the truck and screwed the plastic cap on that keeps the centre diff in the entire drive train locks solid! Hours of stuffing around only to find on the Arrma forums this is a common issue with these! I have the standard plastic diff mount and my truck is only 5 months old. The hot racing case doesn't have a raised section on hat like the factory plastic unit so what happens is the red anodised end rubs on the plastic mount. Waste of money! Now I'm off to get the Arrma unit.
The quality of this diff cup is outstanding and I love that it does away with the paper gaskets and replaces them with rubber o-rings. They even give you a spare one. They fit the exb cars and the limited slip plates. Only issue is, they do not fit in the center diff mount without modification to the mount itself. I had to put shims on both sides of the diff behind the bearings and also shave away material on the insides of the mounts to allow the diff to have room to spin freely. Not too big a deal if you have a rotary tool. But this should be something that should be addressed by hot racing or at least noted in the listing of the item...
Three verified-owner reviews, rated 1 to 3 out of 5, all for this 29mm modular aluminum diff case. Reviewers agree the build quality is good and that it uses rubber O-rings instead of paper gaskets, with a spare included. Fitment is the main recurring problem. One reviewer reports the case rubbed the plastic mount and locked the drivetrain, and said the case lacks the raised section of the factory unit. Another had to add shims and shave the center diff mount to clear. A third reports the supplied spur gear screws have a countersink angle that causes the heads to rub the motor mount, and fixed it with standard countersink screws. Reviews concern the same variant and are limited in number.
- + Good build quality
- + Rubber O-rings replace paper gaskets
- + Spare O-ring included
- + Fits EXB cars and limited slip plates
- − Rubs plastic center diff mount and locks drivetrain
- − Center diff mount needs modification or shims
- − Supplied spur gear screws have wrong countersink angle
- − Fitment issues not noted in listing