Re: shifting properly

Posted by Hugh MacKay on September 13, 2006 at 02:57:39 from (216.208.58.144):

In Reply to: shifting properly posted by Young and dumb on September 12, 2006 at 20:09:00:

Young: I wont call you, and dumb. Shifting those large chasis 66 series tractors on the move into that 4th speed is just not worth the effort. It can be done but you just don't have the same kind of momentum going for you as in a straight gear truck.

The 1066 and 1466 have a transmission brake, hooked to clutch pedal, same idea as highway tractors, therefor you must never push clutch down far enough to apply the brake during shifting, if tractor is moving. Then you must align your engine rpm so it is in perfect sequence with gear your going to. I expect with practice you could get this right, but then you must throw in the factor of grade the tractor is on. These tractors soon stop on upgrade, especially if you happen to push clutch pedal down far enough to apply the transmission brake.

30 years ago I decided it was not worth the effort, even though I was proficient in doing this with highway trucks. Besides a 1066 is quite capable of starting away in 4th, high range and low on TA just about anywhere on hard surface with 10 ton behind it. The 1466 having more hp can only be better. Some upgrades will hamper this with the load behind, but I've never seen a spot were 1066 with 3 ton behind, couldn't start away in 4th, high range and low on TA.

I will also tell you this, shifting TA in those higher gears you should adjust your throttle, to compensate for the gear change. It's all about driveline shock. These are not a Farmall M, they quite often weigh twice as much, yet have no more speed and momentum for on the go shifting.

Another side note, most of these big tractors folks have been speed shifting, have the transmission brake destroyed. It's not designed to stop the tractor, only stop transmission gears from turning after tractor has been idling in neutral. The time you save shifting on the go, most likely be more than used up waiting for the transmission to stop everytime tractor has been idling in neutral with clutch out.

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