Milwaukee 6507 parts help

[buddiedawg]

Have an old Milwaukee 6507 Sawzall sn0063161605 that runs only one speed. Looks like someone previously has been inside the switch and speed control parts and thus my question.
There is a GE SC143D triac mounted on right side armature area using the tab of the device as hookup from the brush.The remaining two small leads go to the switch circuit.
There is no LO/HI slide switch or provisions for it in the handle.
What do I need to do in order to get the variable speed working?
Parts required with correct numbers? I've not seen this GE triac shown on any parts breakdowns yet.
This Sawzall must be an oldie but it has a lot of life left and I would truly like to get the variable speed working as it should

[cmoorejack]

Hey buddiedawg,
The variable speed is from the switch..part# 23-66-1470..also there is a module that helps it..#14-20-0270..
parts avail at ereplacementparts.com..
hope this helps...
Craig

[buddiedawg]

Craig, thanks for the information--I'll be ordering parts SOON!
Best regards!