oldstyle Posted October 20, 2020 Share Posted October 20, 2020 Hello, I had a leaking rear seal that destroyed the transmission mount in my 1966 Riviera. When I pulled the seal I found this hole. It looks like it was drilled. I'm not sure why someone would do that so I'm hoping it's supposed to be there. Thanks, Raul Link to comment Share on other sites More sharing options...
JZRIV Posted October 20, 2020 Share Posted October 20, 2020 (edited) Raul, Yes it should be there. I believe it is to insure enough oil reaches the seal so it stays wet/lubed and/or perhaps acts as an escape for oil that pushes past the yoke bushing. Someone else may chime in that can verify. Tranny mounts on these cars should be inspected and or replaced if they appear to be originals. Slight seal seepage is inevitable and over many years the rubber will become soft and separate from the mount....not to mention from old age itself. Edited October 20, 2020 by JZRIV (see edit history) 1 Link to comment Share on other sites More sharing options...
telriv Posted October 20, 2020 Share Posted October 20, 2020 That hole supply's an escape for the oil to return to the trans.pan. So YES it should be there as Jason has stated. Tom T. 1 Link to comment Share on other sites More sharing options...
oldstyle Posted October 21, 2020 Author Share Posted October 21, 2020 Thanks for the help! I was worried that this small job was about to be a big job. Raul Link to comment Share on other sites More sharing options...
EmTee Posted October 25, 2020 Share Posted October 25, 2020 Hmmmm, that's the transmission tailshaft/driveshaft yoke seal? I just replaced the one in my '67 last summer and neither the original nor the replacement had that hole in it... Link to comment Share on other sites More sharing options...
JZRIV Posted October 25, 2020 Share Posted October 25, 2020 15 hours ago, EmTee said: Hmmmm, that's the transmission tailshaft/driveshaft yoke seal? I just replaced the one in my '67 last summer and neither the original nor the replacement had that hole in it... Tim, I thought that too after first glance at the pic but the seal has already been removed and the hole is in the casting. Link to comment Share on other sites More sharing options...
EmTee Posted November 1, 2020 Share Posted November 1, 2020 On 10/25/2020 at 11:06 AM, JZRIV said: thought that too after first glance at the pic but the seal has already been removed and the hole is in the casting. OK, thanks Jason -- I do remember seeing that hole in the tailshaft housing. Link to comment Share on other sites More sharing options...
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