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1970 R75/5. Are the driveshaft and final drive both separate units? I see there are 2 fill bolts and 2 drain bolts. What would the capacity be on each? I've drained both, just don't want to fill incorrectly. Thanks
Yes, separate reservoirs. For the driveshaft, specs call for 100cc...after the conversion to the long wheel base, it went up to 150cc, although even 100cc would work for the later driveshafts. As for the final drive, you remove the plug at the 9 o'clock position for filling...fill to the bottom of the threads.
I removed the hex head bolt at the final drive and the fluid was way overfilled, it was overflowing. Hence thinking that the driveshaft was with the final.
I just bought this non running. I got the engine running but have not ridden it. I will check the seal for sure. Thanks.
And yes, gear box oil can migrate into the drive shaft housing if the rear seal of the gearbox is leaking.
Be sure the bolt that holds the speedometer cable to the right rear of the transmission has the hole down the center unplugged. This allows the transmission to breathe as fluids heat up and cool down. If plugged, the transmission can become pressurized and the fluid may migrate.
I just checked the speedo cable bolt. It is plugged. I have it in the ultrasonic now.