Shuttle shift usage Kubota M7060

[Fallon]

Anyone know if the GST--Glide Shift Transmission--is still offered? Think it will be around long term?

They have been around for a couple decades at least. GST is the only high end option over clutched gear transmission on current machines over 60hp or so.

HST is a more precise easier to use transmission, but has a 15% HP tax. So geared machines & GST are going to be around for quite some time where efficiency matter, like field work.

 

[Farmer495]

They have been around for a couple decades at least. GST is the only high end option over clutched gear transmission on current machines over 60hp or so.

HST is a more precise easier to use transmission, but has a 15% HP tax. So geared machines & GST are going to be around for quite some time where efficiency matter, like field work.

GST is a compact tractor trans, won't find that on M series and bigger, most Ms are over 60 HP.

Interesting on 15% tax on hydro, must be regional thing. All tractors under 60 PTO HP have full sales tax 'here" (15%), anything over has no tax. Transmission has nothing to do with it "here"

 

[Tx Jim]

Neat, didn't know that. I am guessing it's cause the "springs" in it like a regular clutch. Sounds like no way to wear it out if you can't engage/disengage it though.

My dairyman neighbors JD 5603 with a similar damper clutch required replacement because the springs wore out in the damper clutch hub assembly.

 

[ovrszd]

GST is the elusive subject. Several posters here on TBN have them but I've never heard an explanation of how they work.

I'll do a Google search.

 

[sixdogs]

GST is a compact tractor trans, won't find that on M series and bigger, most Ms are over 60 HP.

Interesting on 15% tax on hydro, must be regional thing. All tractors under 60 PTO HP have full sales tax 'here" (15%), anything over has no tax. Transmission has nothing to do with it "here"

He means loss of horsepower, not a physical financial tax.

Easy mistake since you're north of the border and not familiar with lots of things here.

 

[4570Man]

I have no idea how the GST works but they’re light years ahead in operator friendliness compared to a shuttle shift or whatever the term is for base model Kubota transmissions. I’ve unloaded a couple trucks with telhandlers and they behave like a 6 speed automatic transmission set to manual shift. There’s no toque converter in the GST or at least the one I had.

 

[sixdogs]

Anyone have a simple explanation of how the GST works?

 

[Fallon]

GST is a compact tractor trans, won't find that on M series and bigger, most Ms are over 60 HP.

Interesting on 15% tax on hydro, must be regional thing. All tractors under 60 PTO HP have full sales tax 'here" (15%), anything over has no tax. Transmission has nothing to do with it "here"

By tax I meant a HST is 15% less efficient than a gear transmission. A hair less HP ends up at the rear wheels. Not related to the IRS.

 

[Fallon]

Anyone have a simple explanation of how the GST works?

Fundamentally the same way as single clutch automatically shifting sports cars. An automatic transmission with a hydraulically operated clutch instead if a torque converter. Not sure if GST uses planitary gearsets or hydraulically actuated shifting forks, but I suspect planitaries.

The bigger John Deere PowerShift machines are the same way, only with a double clutch. I assume the bigger Kubotas have a double clutch as well.

 

[sixdogs]

Still confusing. So to shift I just shift and forget about the clutch?