Re: 1948 r9 OD roller clutch operation

Posted by Peter Packard On 2015/9/5 7:43:16

You will find that the cam on the overrun clutch is probably grooved, usually by around 30 thou. This means that the rollers will not grip in the engine drive mode as the rollers drive up the ramp. A very frustrating symptom in traffic when the engine revs and no drive. It also occurs when limited slip oils are used in the gear box oils. There is no option other than a replacement cam...forget about oversize rollers as they create problems in overrun drag. Unfortunately you have to pull the gearbox not just the rear of the O'D to inspect this miscreant. PT