Duratrax Maximum two speed question
04-16-2008, 03:54 AM
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RE: Duratrax Maximum two speed question
HOW TO ADJUST THE 2-SPEED TRANSMISSION:
The shift point on the 2-speed transmission is factory set. You
can make adjustments to the shift point on the 2-speed transmission.
When you make shift point adjustments, it is important
that your engine has already been broken in, is properly tuned,
and already at proper operating temperature. To adjust the shift
point use the following procedure:
1) Warm up the engine (run it for a minute or two) and then stop
the engine.
2) Rotate the 2-speed outer housing attached to the smaller
spur gear so that the access hole is up.
3) Rotate the outer housing back and forth until you can see a
small set screw on the inner housing. This set screw does not go
straight down into the inner housing, it is set at an angle. This is
the adjustment screw for the shift point.
4) Insert a 2mm allen wrench into the set screw.
5) To raise the shift point (make it shift later, when the engine develops
more RPM), turn the screw clockwise 1/8 of a turn. Do not overtighten
this screw you may damage the 2-speed transmission.
6) To lower the shift point (make it shift earlier) turn the screw 1/8
of a turn counter clockwise. Do not loosen this screw too much.
The screw could fall out requiring disassembly of the entire
2-speed to repair.
7) Do not make adjustments more than 1/8 of a turn. After each
adjustment, start the engine and test the shift point.
If you have made adjustments to the shift point and want to return
to the factory setting, it is 5.5 turns out from the point that the
screw will not turn in any more without using excessive force.
It is possible to have the shift point too far in, in which case the
inner clutch on the 2-speed is locked such that only the two
inner gears (the gears for top speed) will be engaged during the
run and the outer gears (the gears for good acceleration) will not
be engaged at all. It is also possible to have the shift point too
far out, which will mean that you are only running the acceleration
gears. In either case you will not hear the truck shift. Make
sure that you listen carefully for the RPM change of the engine
that signifies that the 2-speed is shifting
The 2-speed conversion kit manual can be found here:
http://manuals.hobbico.com/dtx/dtxc9610-manual.pdf
The shift point on the 2-speed transmission is factory set. You
can make adjustments to the shift point on the 2-speed transmission.
When you make shift point adjustments, it is important
that your engine has already been broken in, is properly tuned,
and already at proper operating temperature. To adjust the shift
point use the following procedure:
1) Warm up the engine (run it for a minute or two) and then stop
the engine.
2) Rotate the 2-speed outer housing attached to the smaller
spur gear so that the access hole is up.
3) Rotate the outer housing back and forth until you can see a
small set screw on the inner housing. This set screw does not go
straight down into the inner housing, it is set at an angle. This is
the adjustment screw for the shift point.
4) Insert a 2mm allen wrench into the set screw.
5) To raise the shift point (make it shift later, when the engine develops
more RPM), turn the screw clockwise 1/8 of a turn. Do not overtighten
this screw you may damage the 2-speed transmission.
6) To lower the shift point (make it shift earlier) turn the screw 1/8
of a turn counter clockwise. Do not loosen this screw too much.
The screw could fall out requiring disassembly of the entire
2-speed to repair.
7) Do not make adjustments more than 1/8 of a turn. After each
adjustment, start the engine and test the shift point.
If you have made adjustments to the shift point and want to return
to the factory setting, it is 5.5 turns out from the point that the
screw will not turn in any more without using excessive force.
It is possible to have the shift point too far in, in which case the
inner clutch on the 2-speed is locked such that only the two
inner gears (the gears for top speed) will be engaged during the
run and the outer gears (the gears for good acceleration) will not
be engaged at all. It is also possible to have the shift point too
far out, which will mean that you are only running the acceleration
gears. In either case you will not hear the truck shift. Make
sure that you listen carefully for the RPM change of the engine
that signifies that the 2-speed is shifting
The 2-speed conversion kit manual can be found here:
http://manuals.hobbico.com/dtx/dtxc9610-manual.pdf
