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Old 02-11-2010, 09:07 PM   #1 (permalink)
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Clunking sound when shifting?

I'm used to the clunk when shifting into first but I recently went out for a spin and noticed some loud clunking while shifting through other gears. Its a five speed '04 fxstbi 95". Could it be that it was 38 degrees. I'll probably change all the fluids since it is probably time so what should I use for the tranny. Actually let me know what fluids I should use for all. Thanks.
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Old 02-11-2010, 10:15 PM   #2 (permalink)
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ya the cold surely doesn't help keep em quiet any, i've got an '06 fatboy that does the same

just changed out the fluids today, put B&M Trick Shift ATF in the primary & Redline Shockproof Heavy in the gearbox & it made an immediate difference on how it shifted & sounded,, now it clicks into gear
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Old 02-12-2010, 12:31 AM   #3 (permalink)
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I agree with NorCal Dog, I use the Synthetic B&M Trickshift ATF in the primary and Redline Heavy Shockproof in the gearbox and they work very well.
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Old 02-12-2010, 05:33 AM   #4 (permalink)
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+1 on the Redline Heavy Shockproof. Makes a clunk into a snick.

I haven't tried B&M in anything other than a dirt bike...works well.
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Old 02-12-2010, 11:49 PM   #5 (permalink)
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Oh no! You got yourself a clunker. I wouldn't worry about it. I have an 03 Fatboy that clunks when I shift gears, especially from nuetral to first. Try some Rredline Shockproof Heavy. It quieted mine down.
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Old 02-13-2010, 06:29 PM   #6 (permalink)
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Interesting... I run the Heavy Shockproof in all my trannies. In my experience, when the tranny fluid is cold and thick there is LESS clunk. It's when it gets heated up and thinner i notice more clunk.
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Old 02-13-2010, 09:54 PM   #7 (permalink)
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Actually mine is the same with the Redline. Some harley trannys just clunk more than others. Mine is definately a clunker.
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Old 02-14-2010, 05:15 PM   #8 (permalink)
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I would check clutch adjustment inside derby cover first. How many mile on your bike the plates might need replacement.
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Old 02-18-2010, 04:58 AM   #9 (permalink)
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I agree with Hogbag, transmission clunking is more likely caused from clutch not disengaging properly than from the gearbox itself. Clutch adjustment, primary oil level or condition would be the likely causes - just like the cold-into-first clunk.
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Old 02-24-2010, 12:39 PM   #10 (permalink)
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I went out for a ride the other day. Let the bike warm up for 10minutes and I didn't have the clunking problem. Well, first gear but that is always the case. I think it was the cold weather.
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BigBoyz Heads
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Rinehart Cross Backs staggered
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Old 02-24-2010, 12:57 PM   #11 (permalink)
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http://www.harleyhog.co.uk/hippovpc.htm

check this out. came across it a while ago, ordered one yesterday. apparently does away with the clunks completely, and adds clutch capacity to boot! cant' wait.

they responded to my emails quickly and were quite helpful.
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Old 02-24-2010, 01:29 PM   #12 (permalink)
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Therer is a recent thread on it. Search: should I upgrade my clutch spring
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2004 fxstbi
95"
S&S 570G cams
SE 10.25:1 pistons
BigBoyz Heads
CR: 10.15:1
Rinehart Cross Backs staggered
SE Diaphragm Clutch Spring
SEST
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Old 02-24-2010, 03:37 PM   #13 (permalink)
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I agree with less clunk when warm - mine clunks initially when it's cold out. Also, using tranny lube instead of engine oil makes a big difference.
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Old 02-24-2010, 04:57 PM   #14 (permalink)
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Quote:
Originally Posted by jonny oz View Post
http://www.harleyhog.co.uk/hippovpc.htm

check this out. came across it a while ago, ordered one yesterday. apparently does away with the clunks completely, and adds clutch capacity to boot! cant' wait.

they responded to my emails quickly and were quite helpful.
From what i've read, the VPC is great for moded engines requiring a stronger clutch while keeping the lever effort down at lower rpms, but i've never heard of it getting rid of the clunk. Pretty pricey item just to reduce the noise a little. Let us know how you like it.
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