Jim Yergin Posted April 17, 2009 Report Posted April 17, 2009 After my clutch failure a few weeks ago, I took my P12 Woodie off the road to fix the clutch and re-install the O/D transmission that I had removed earlier because it would not shift into third. I upgraded to a 10" clutch. Discovered that the bearings on the main shaft in the transmission had failed. Had the pilot tip of the shaft spray welded and reassembled the transmission with new synchro rings. Also took the time to wire up the O/D controls which I had never done. I even took the time to replace my broken speedometer cable and replace the broken odometer mileage wheel assembly and install my radio. Got everything back together last night and decided to drive the car to work this morning. Started it up, let up on the clutch but the car would not move. At first I assumed the new clutch was not engaging. However, when I pulled the O/D control cable out to lock-out the O/D, the car drives just fine. What is going on in the transmission so that the car will not move if the O/D is not locked out? At least I can drive the car again but I would like to get the O/D to work. Our local Woodie club is having a tour to Appomattox Couthouse on the 25th. It is 130 mile one way so I hope to get any remaining bugs worked out before then. Jim Yergin Quote
Jim Yergin Posted April 17, 2009 Author Report Posted April 17, 2009 I just did what I should have done before making my post, I checked the Borg-Warner manual. It says that my condition can be due to broken rollers in the roller clutch, sticking of the roller cage on the cam, or worn cam faces. I replaced the roller bearings so they are new and were not broken when I reassembled the transmission. That leaves the other two possibilities. The manual says that to correct the worn cam surfaces problem the cam must be replaced. However, the manual does not say what would cause the roller cage to stick or how to correct the problem. Does anyone have any suggestions? Thanks. Jim Yergin Quote
james curl Posted April 17, 2009 Report Posted April 17, 2009 The overdrive on my Pick Up will not go into reverse when the solenoid is engaged, are you sure you were in reverse when you let the clutch out? You might try putting the control cable back into the overdrive position and drive the car, then if will not move it has to be in the overdrive unit, probably the over running clutch as you supect. Quote
blueskies Posted April 17, 2009 Report Posted April 17, 2009 Sounds to me like the free-wheeling clutch is not working. There is a spring and big rollers inside a cage, that lock onto a drum that fits around the cage. If the cage or rollers are stuck or if the spring is broken and wedged in there, and they aren't spinning out to the drum, it will not connect to the output shaft. I found that the big clip that holds the clutch to the end of the shaft on my OD was off, and getting ground up inside the drum... Probably will have to pull it apart to see what is going wrong... Pete Quote
Jim Yergin Posted April 17, 2009 Author Report Posted April 17, 2009 Pete, I figured that that is what I am going to have to do. Do you have any idea as to what would make the roller cage stick? BTW, did you ever install the relocated truck shock absorber arms on your car? Jim Yergin Quote
blueskies Posted April 17, 2009 Report Posted April 17, 2009 Pete,I figured that that is what I am going to have to do. Do you have any idea as to what would make the roller cage stick? BTW, did you ever install the relocated truck shock absorber arms on your car? Jim Yergin Not really sure what could make the cage stick, other than maybe the spring busted and got wedged in the cage or something... As torque is applied to the freewheeling clutch, the little ramps under the rollers push the rollers outward and against the drum, locking the clutch to the drum. When the overdrive is locked out, the sun gear turns the drum directly, bypassing the freewheeling clutch. If the car moves forward when the od cable is pulled out, but not when it is pushed in, then there must be something up with the freewheeling clutch or maybe the sun gear. I have not yet installed my shock mounts, but plan to as soon as winter decides to give way to spring around here... Pete Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.