Transmission tools
OwnerJohn A. Marenchininventor
Life of this patent
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Abstract
The improved transmission tools are adapted to compress springs forming parts of the front and rear servo assemblies of an automatic transmission, so that snap spring locks may be removed to permit removal of the assemblies from the transmission housing. The tools make use of holes which are already part of the transmission housing, and include parts which are freely inserted in such holes, but which bind in the holes when the tool is canted slightly so as to permit force to be applied to the respective spring to compress it and therefore permit removal of the respective snap ring lock.
Claims6
The method of removing a snap ring lock from seating relation in a groove at the open end of a bore in the housing of an automatic transmission, said housing having a hole adjacent to said bore and a servo within said bore and including a spring retainer forced against said snap ring lock by a kickdown spring, said method including the steps of:
- inserting a rigid stem having a roughened peripheral surface into said housing hole and disposing a rigid plate which is connected to said stem over the open end of said bore,
- forcing a plug which is interposed between said plate and said spring retainer inwardly of said housing bore and against said spring retainer to displace the latter inwardly of said bore to compress said spring and move said spring retainer from abutting relation with said snap ring lock, whereby the latter may be removed from the groove in which it is seated, and canting said stem to cause it to bind in said housing hole to provide a rigid backup for the forcing action of said plug.
An improved tool for use in compressing the kickdown spring of a servo in an automatic transmission so that a spring retainer may be displaced from abutment with a snap ring lock whereby the latter may be removed, said transmission having a housing with a bore in which said servo is disposed, and a hole adjacent to said servo, said improved tool comprising:
- a rigid stem of a transverse size to freely fit into said hole and when canted to bind in said hole and thereby hold said tool in position on said housing,
- said stem having a roughened peripheral surface so that it has good gripping engagement with the surface defining said housing hole when said stem is canted,
- a rigid plate connected at one end to said stem and being of a length so that its other end overlies said servo, and
- means interposed between said plate and said spring retainer to apply pressure thereagainst and move it inwardly of said housing bore and displace it from abutment with said snap ring lock so that the latter is accessible for removal from said housing bore.
Dependencies are inferred from the claim text.