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Old 02-26-2009, 10:33 AM   #1
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Default OFNA LD-3 2 speed questions

Hey guys this forum has been a wealth of knowledge lately, hopefully i can get some help on this car. I just finished breaking the motor in last nigh and on the 5th tank started hitting hi speeds, but I don't think it is shifting. Is there an adjustment for the 2nd gear? I'm used to hearing my savage shift, could it be possible it is so subtle I cuoldn't hear it?
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Old 02-26-2009, 11:10 AM   #2
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Hey guys this forum has been a wealth of knowledge lately, hopefully i can get some help on this car. I just finished breaking the motor in last nigh and on the 5th tank started hitting hi speeds, but I don't think it is shifting. Is there an adjustment for the 2nd gear? I'm used to hearing my savage shift, could it be possible it is so subtle I cuoldn't hear it?
Start the car, hold it by the handle, and throttle up and see if it changes gears.
You should see and feel the car go into second gear.
If not, back both sides of the two speed off equally going about 1/2 turn at a time, and seeing if it changes as you start backing of the set screws
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Old 02-26-2009, 11:22 AM   #3
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ok so the set screw, they hold the gear down to the shaft? Sorry man i'm a newbie.
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Old 02-26-2009, 02:20 PM   #4
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ok so the set screw, they hold the gear down to the shaft? Sorry man i'm a newbie.
Sort of. Of you have your manual, they've got a pic of how it's set up (If not, get it here http://www.ofna.com/pdf/ld3-rtr.pdf. It will save headache down the road!). There is a small metal adapter that bolts onto the 2 speed shaft. The 2 speed shoes have 2 small metal balls that sit inside and the whole thing wraps around the adapter.
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Old 02-26-2009, 02:35 PM   #5
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Thanks spin, I do have the manual at home I'm at work now! Spin do you have this car?
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Old 02-26-2009, 03:27 PM   #6
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Thanks spin, I do have the manual at home I'm at work now! Spin do you have this car?
I have the LD3, CD3 and MTX4R, so I know plenty about the car you have!
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Old 02-26-2009, 07:10 PM   #7
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Ok we are looking right now there is 2 set screws and 2 screws with springs that hold the shoe on... One set is counter sunk at 45 deg angle. wich 2 do I back off of?
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Old 02-26-2009, 07:23 PM   #8
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Ok we are looking right now there is 2 set screws and 2 screws with springs that hold the shoe on... One set is counter sunk at 45 deg angle. wich 2 do I back off of?
Back off the screw that are on th 45% angle.
Just on the opposite side though, it you tighten them too much you will collapse the springs. Only tighten them if you want the 2 spped to shift later
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Old 02-27-2009, 07:47 AM   #9
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Thanks guys. I will do the adjustments tonight! Once again thanks for everyones help.
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Old 02-27-2009, 08:46 AM   #10
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Make sure you back them out the same amount on both sides as well. Also, be sure the shoes don't spin around on the 2 speed adapter.
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Old 02-27-2009, 08:48 PM   #11
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Man, I'm frustrated... I went out starting 1/2 turn on each evenly got like 2 turns out to were it was slightly rubbing the silver collar, no shifting... could I be running rich? I'm 2 turns out on high needle...
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Old 02-28-2009, 06:50 AM   #12
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1. Yes, if the engine is running too rich it will not spin fast enough for the transmission to shift. Get the engine properly tuned first. I have experienced this firsthand with the CD3 transmission.
2. The 2-speed shoes should be secured with both shoes touching each other at their ends. Tighten the center adjustment on each shoe enough to keep the ends of the 2-speed shoes together, not separated.
3. For the adjustment screws, try this. There is a 3/4 turn range (or less) that you will use for shifting adjustment ... The full range is around 3 turns. Looking at the each 2 speed shoe adjustment screw form the side. You will be looking at a hole cut into the round surface. Place the head of the shifter adj. screw 1mm below the lowest part of the hole. This is a starting point that I have used with nwe transmission parts.
4. To test shifting, I suggest this method. Open the throttle 1/4 way (maybe a little more) and hold it there, the engine rpm will increase gradually and it will be easier to hear a gear change from first to second gear.
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Old 03-01-2009, 11:19 AM   #13
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Sweet man thanks for all the help, she is absolutley screaming now. MY GOD. I think I got a great buy for 159.00.
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