Re: 1951 ultramatic leaks
Posted by HH56 On 2017/12/13 22:15:00
If there is more than one seal on now the old will have to be removed. To remove the old seals without damage to the shaft surfaces it is best to remove the shafts. It may be possible to get some kind of screw into the old seal and pull it out with the shafts in place but that would be quite a feat with the trans in the car.
The selector shaft on the drivers side is about 8" long x 5/8" diameter give or take and once the internal pieces are disconnected the shaft will have to come straight out so needs a hole in the frame.
The throttle shaft on the passenger side is smaller -- maybe 3/8 or so in diameter but due to the lever on the inside end it is removed from inside the case. Passenger side would not need a hole for shaft removal.
The problem is both seals are inserted from outside the case and need to be driven into the bore and seated. In order to do that you would use something like a deep socket that would fit over the shaft but inside the bore as a driver. You can see if there is enough clearance on the throttle side to insert from the bottom and turn it onto the shaft and use something like a pry bar to push the seal in but if not, to insert the socket straight on over the shaft and then drive it you will probably need a hole in the frame on that side so socket length can slide straight over the shaft and then be tapped with a hammer
Here are a couple of photos of a 55 Ultra. Ross or someone who has done the procedure on an older Ultra can confirm for sure but I believe the 51 selector shaft and procedure is the same. The throttle shaft is similar in seal replacement but the shape of the shaft and inside lever a bit different in 51.
Attach file:
(52.53 KB)
(59.38 KB)
The selector shaft on the drivers side is about 8" long x 5/8" diameter give or take and once the internal pieces are disconnected the shaft will have to come straight out so needs a hole in the frame.
The throttle shaft on the passenger side is smaller -- maybe 3/8 or so in diameter but due to the lever on the inside end it is removed from inside the case. Passenger side would not need a hole for shaft removal.
The problem is both seals are inserted from outside the case and need to be driven into the bore and seated. In order to do that you would use something like a deep socket that would fit over the shaft but inside the bore as a driver. You can see if there is enough clearance on the throttle side to insert from the bottom and turn it onto the shaft and use something like a pry bar to push the seal in but if not, to insert the socket straight on over the shaft and then drive it you will probably need a hole in the frame on that side so socket length can slide straight over the shaft and then be tapped with a hammer
Here are a couple of photos of a 55 Ultra. Ross or someone who has done the procedure on an older Ultra can confirm for sure but I believe the 51 selector shaft and procedure is the same. The throttle shaft is similar in seal replacement but the shape of the shaft and inside lever a bit different in 51.
Attach file:
(52.53 KB)
(59.38 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=198381