Primary chain eating the oil trough? - Saab 900 Bulletin Board - Saabnet.com
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Many customers with potential transmission problems, might opt to install the 1989 and later 5 speed transmissions as these employ several improvements, including an increase in pinion bearing sizing.
The oil catch found within your primary drive should only provide a quicker movement of lubrication, especially at higher engine RPM, but should not factor the ability of the hydraulic tensioner to do it's task. The tensioner is easy to replace, if there is any speculation of failure, and any known working tensioner could be installed...such as the 1985 900 transmission which you plan to remove.
The 900 transmission had a spring "Brake" which reduces any chance of damaging the reverse gear idler or pinion gear. These springs have been known to weaken or break in service which allows for the damage found with both reverse gears. This could be addressed via putting the gear selector into a forward gear just prior to engaging reverse. There are also methods of extending the throw/movement of the reverse gear fork which helps extend service with such a damaged reverse gear.
Thanks again for your post, and we will look forward to hearing relative to your progress!
Gary K. at SWEDISH DYNAMICS, INC.
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