Author Topic: Automatic transmission selector shaft seal replacement  (Read 120 times)

OysterSlayer

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  • USA, CA, San Rafael
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Automatic transmission selector shaft seal replacement
« on: July 07, 2025, 00:35:34 »
I have been plagued by a slow transmission leak for a while and just tracked it down to the selector shaft. Has anyone successfully replaced this seal without removing the transmission? I'm ready to tackle it but I'm hoping not to drop the transmission.

Can anyone tell me where to find a schematic/photos of the auto transmission and all it's parts?

Thanks, John
70 280SL, white- red leather- tan top
78 Laverda Jota
79 Kawasaki Z1R tc
75 Can Am TNT 250

MartinK

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Re: Automatic transmission selector shaft seal replacement
« Reply #1 on: July 07, 2025, 11:33:01 »
Hei. I think it is possible. You have to remove the drive shaft, the the rear  trans cover, the oil pan, the hydromechanical assembly and then disassemble the selector shaft. It is necessary to pull it outwards. Maybe the space between transmission and car body is too narrow. I can give you the length of the selector shaft to check. The shaft seal is steel reinforced and not easy to install. Normally I have a hydraulic press but maybe you can pull it in position with a bolt and a wrench nut and a washer. 
It's worth a try but maybe you are quicker with pulling the complete transmission.  Talk soon, Martin

OysterSlayer

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  • Junior Level
  • USA, CA, San Rafael
  • Posts: 7
Re: Automatic transmission selector shaft seal replacement
« Reply #2 on: July 07, 2025, 14:45:42 »
Martin Thank you, I will take a good look at the clearance but I may have to drop the transmission to do the job.
70 280SL, white- red leather- tan top
78 Laverda Jota
79 Kawasaki Z1R tc
75 Can Am TNT 250

 

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