Re: grinding gears

Posted by Wardner on October 25, 2004 at 20:27:02 from (64.136.49.228):

In Reply to: grinding gears posted by Kid with dumb question on October 25, 2004 at 19:01:30:

I am guessing that your father grinds them too. Maybe not quite as bad as you. If he knew how to shift, he would have taught you the drill and supported your effort to learn.

The first step in learning how to shift is to understand how a transmission works. The grinding is caused by two gear circumferences running at different speeds. Ideally you should try to match the speed of the mainshaft with the speed ratio of the countershaft even as both are accelerating or decelerating. That can be done with timing, throttle control, and clutching. Variables include load on tractor, terain, and grade.

To put it simply, it is an acquired skill that will take some time to learn. You will find that downshifting will be the easyiest to learn because the throttle won't have to be moved. Some shifting on the go is impossible if the loads on the tractor are high. Just stop the tractor and select a new gear. These are the times you wished you had a good TA.

Synchomesh gear clutches were invented in the '20s to simplify shifting. Trucks didn't get them until the '50s. Tractors were even later. Some Roadranger truck trannys are still built without them. These manual transmissions are shifted without using the clutch on many of the gear changes. It's all done with throttle control and deft shifter movememt and range selection once the vehicle is underway in first gear.

If your father won't or can't show you how, you should seek out an oldtimer who might really enjoy teaching a beginner how to shift, particularly if it's not his tractor.

Follow Ups:

• Re: grinding gears Biged 13:47:15 10/26/04 (0)

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