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    Road Master rhino65's Avatar
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    Default Gear whine on CSC Conversion

    Now that I'm getting in some ride time on my trike I'm noticing some pretty good gear whine from the gearbox/ diff area. Its got a 2009 CSC conversion with the gearbox on front of diff. Is a good bit of whine normal? At 70 mph its really singing.
    2002 GL1800 with CSC trike kit

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    JustWings
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    Quote Originally Posted by rhino65 View Post
    Now that I'm getting in some ride time on my trike I'm noticing some pretty good gear whine from the gearbox/ diff area. Its got a 2009 CSC conversion with the gearbox on front of diff. Is a good bit of whine normal? At 70 mph its really singing.
    Can't remember what CSC calls that design. But it like a 4x4 transfer case sitting on the side of a P/U transmission. In this situation, it's a small cast housing with some idle gears inside, and it sits to the right front side of the diff. It's purpose is to make the drive shaft more inline with the output shaft of the engine.

    If that is the design you have, singing is not good. Do you have excessive clucking when shifting gears or throttling on/off at parking lot speeds ??? The off-set cast unit has a small drain plug in it's bottom ... remove it and look for metal in the oil, or no oil at all.

    CSC has an updated shaft assembly that removes the off-set housing. Also, sometimes "singing" can be caused from cupped tires.

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    Road Master rhino65's Avatar
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    I drained fluid out of both gearbox & diff right after buying it. Called CSC to see how much to refill both. 1 qrt for diff & 6 oz. in gearbox or until it runs out check hole. To my surprise it was clean from both and not lo in either. Not getting any clunking & shifts smooth, even smoother not using clutch.

    Replaced the driveshaft with one from Mountain Trike also. The CSC had slop in the shaft splines and rubber donut cracked SEVERLY in sevral places. Did a google search for CSC gearbox whine & some stated it was normal while others said shouldn't hear anything but wind. Kit does have 40k miles on it.
    2002 GL1800 with CSC trike kit

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    I have 08 csc cobra with the gear box remove it has no whine , I also have a 05 csc cobra with rubber drive shaft & the gear box it has no whine to it .

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    Road Master rhino65's Avatar
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    Quote Originally Posted by ROAD DOG View Post
    I have 08 csc cobra with the gear box remove it has no whine , I also have a 05 csc cobra with rubber drive shaft & the gear box it has no whine to it .
    Rear tires are cooper cs4 that were put on new with conversion. Conversion has 40k miles on it. Tread is little more than 1/2 used up. Could certain brands of tires that are wore down by half cause a whine very similar to a gearbox?
    2002 GL1800 with CSC trike kit

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    Road Rider ectrike's Avatar
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    We have Cooper cs4 tires on our trike. Don't make any noise at all.

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    JustWings
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    Quote Originally Posted by rhino65 View Post
    Rear tires are cooper cs4 that were put on new with conversion. Conversion has 40k miles on it. Tread is little more than 1/2 used up. Could certain brands of tires that are wore down by half cause a whine very similar to a gearbox?
    Did your whine change at all with the fluid change ???
    Does the whine change pitch when the pavement changes ???

    On a trike, many trike shops recommend new tires when the tread is half worn. As the tread depth lessons, and because there is not a lot of weight on the tires, water can't escape as well under the tread face as when new, and the tire becomes squirrelly on wet pavement ... basically they began to float. It sounds like new tires are needed anyway.

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    Road Master rhino65's Avatar
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    Quote Originally Posted by GoldWingrGreg View Post
    Did your whine change at all with the fluid change ???
    Does the whine change pitch when the pavement changes ???

    On a trike, many trike shops recommend new tires when the tread is half worn. As the tread depth lessons, and because there is not a lot of weight on the tires, water can't escape as well under the tread face as when new, and the tire becomes squirrelly on wet pavement ... basically they began to float. It sounds like new tires are needed anyway.
    I noticed it when I test rode it. Then for next 2-3 weeks I changed fluids, coolant, air filter, plugs along with new shaft from Mountain Trike. Thought @ $16500 it was good deal for 02 but live & learn. If worst comes to worse replace entire rear end. Its only $$
    2002 GL1800 with CSC trike kit

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    Road Captain CrystalPistol's Avatar
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    Quote Originally Posted by GoldWingrGreg View Post
    On a trike, many trike shops recommend new tires when the tread is half worn.
    Yep .... if prone to ride in rain I'd say "not a bad idea" (might be easier "mentally" if the tires also fit your daily driver 4 wheeler). "Wife Unit" and I got caught in a sudden down poor one day, likely 3/4 of tread left on Lemans SR 215/70-15 rear trike tires, two up only (no trailer) reduced speed under 35 coming south out of Staunton, under overpass start up out of ever so slight dip, easy on throttle, RPMs went up and rear went to right and I countered ..... likely went a hundred feet like that .... already looking for a place to pull over, we did at SS Co-Op under their gas awning.

    Only one other time
    in my life I have had such a bad case of hydroplaning .... even in 31 years as a state police officer working in all kinds of weather responding in it .... and that was about 1971 in my '69 VW Beetle which had adapters on it for Chevrolet wheels and I had a pair of 14" wheels on back with then near new Sonic Maxima 60 G60-14 tires that stuck out the fender (pretty fat tire on rear of a light car, oem VW 5.60-15 on front) and at 45 mph in hard rain .... I suddenly was looking out the right vent glass at my direction of travel .... recovered .... but learned how easy it is with lightly loaded fat tires.

    There were plenty of times as a responding officer I pushed the edge, but the car was heavy and I knew my tires and my roads.

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    Please contact our Service Department to speak with a CSC Tech. They have a few questions and would like to speak with you to help you out with this. You can ask for Will or Shawn. 1-800-824-1523

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