8th SCALE CENTER DIFF
The 8th scale center diff in a Revo all started with a guy naming himself ‘’CowboyRay’’. He made an 8th scale CD using a Thunder Tiger TTR S3 buggy center differential. His design required extensive machining to be done and was financially out of reach of many. Some people tried to take over this design and tried to market this CD but the financial aspect was a problem again. It was just very expensive to produce and the sale price was high. Cowboy made and sold a few hundreds of them and then stopped when Traxxas came out with their own version of a center differential with rear brake. Then I saw on the RC Monster forum a guy named ‘’sjcrss’’ made an 8th scale center differential with parts of an Ofna Hyper 7 buggy CD that did not require the help of a machinist or machining equipment. Having at least a drill press or access to one helps a lot though. The hardest part of making this CD is definitely making M3X.5 threads in hardened steel.
So I went with sjcrss’ idea of using the hardened steel spur gear as the diff cap and CowboyRay’s idea of using Thunder Tiger parts. I modified the ERBE’s output gear TRA3984X and I modified these two parts, TRA5415 and TRA5416. They are the output shafts for the Revo 3.3 center diff.
The Thunder Tiger spur gear PD1893
