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Old 08-08-2017, 08:24 AM   #16051
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Old 08-08-2017, 12:00 PM   #16052
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So I did a bit more searching and it seems most of the Pro4 revivals other than TC racers are the drifters who have been fitting CS gears into the diff cases. In several places online I've seen the Yokomo 2.0x Counter-steer solid axle/spool set D-051 or D-089 (for 1.8x) being installed in the rear of the Pro4 with a modified input shaft to use the corresponding pinion gear.

The above got me thinking whether the SD gear diff I mentioned earlier would fit, as it's from the same chassis which the CS gears are designed for.

Now of course even then there might be the issue of the ring gear position to get the right gear mesh.

HPI Pro4 CS - CSJunkies


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Old 08-08-2017, 03:05 PM   #16053
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OK guys, here's the dimensions. 29 width and circa 20mm of maximum diff case OD. Not much else needed right?
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Old 10-11-2017, 03:23 AM   #16054
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Default Better O-Rings. . . . . . .?

What O-Rings are better?

-item # 6820 P-3 (Clear) (I currently use)

Hot Bodies
-item # 114673 #30 P-3(Yellow)
-item # 114674 #40 P-3(Orange)
-item # 114675 #50 P-3(Green)

What makes them different; besides the color?
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