GL1200 Drive Shaft Damper Spring


Information and questions on GL1200 Goldwings (1984-1987)
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Rednaxs60
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GL1200 Drive Shaft Damper Spring

Postby Rednaxs60 » Thu Mar 24, 2016 5:50 pm



Was reading the thread "The Wheel truth" - 84-87 flange/wheel fit info" by deanbwand I have a query about the 1200 drive line that I think complements deanbw's thread.

There is a damper spring in the end of the drive shaft that fits into the pinion joint of the FD. It shows on the parts fiche and in the service manuals for the 1200s. I have had comments and read that this spring is not installed on the '84 1200s.

My thought is this spring is installed to minimize the oscillation of the driveshaft and u-joint when power/torque is applied and removed from the drive line. Without this spring, I would think that you might hear the drive shaft and u-joint move in the form of a "clunk".

If the drive lines of the 1200s from '84 to '87 are interchangeable would it not be reasonable to expect that all 1200 drive lines have this spring installed. If not, a person would have to buy and install this damper spring when an '84 drive unit is installed in an '85 and newer bike.

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julimike54
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Re: GL1200 Drive Shaft Damper Spring

Postby julimike54 » Thu Mar 24, 2016 7:15 pm

If you are referring to this spring (in Final Shaft [FS]) p/n 23732-371-000 Per this parts fiche http://www.westernhonda.com/fiche_section_detail.asp (you have to look for the year etal, it doesn't have a page that I can copy) that is the p/n for 1984 & 1985. The p/n changed for 1986 & 1987, in fact parts fiche shows 2 to select from, but only showing 1 p/n on that website. Parts manual I have shows 23732-ML8-000 (all 1986) and 23732-ML8-600 (all 1987).

Not sure if drive lines are interchangeable but maybe complete drives are interchangeable(ie FD and FS), but when searching FD p/ns they all seem to go back to the '87 p/n and previous are obsolete, so maybe the FS is interchangeable.
Last edited by julimike54 on Thu Mar 24, 2016 7:43 pm, edited 1 time in total.
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Rednaxs60
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Re: GL1200 Drive Shaft Damper Spring

Postby Rednaxs60 » Thu Mar 24, 2016 7:34 pm

The spring I'm referring to is item #4 - 40215-ME9-003. It shows up on the '84 fiche schematic, but there is no P/N for it. It is on the '85 to '87 parts fiche and there is a P/N. As I mentioned, it fits into the end of the drive shaft that fits into the FD pinion joint.

Wonder if Honda found this to be an issue and made this change to minimize the impact of the drive shaft/u-joint movement. The P/N for the drive shaft is the same for all years so I would expect the drive line to be interchangeable.
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twocams
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Re: GL1200 Drive Shaft Damper Spring

Postby twocams » Thu Mar 24, 2016 7:58 pm

I had an 84 Interstate for 12 yrs. got it when it was 4 yrs old. Had 50,000 on when sold. But never had any issues with drive shaft clunking or anything related. But loose u-joints and slop in the splines, gears wearing in the diff. will all cause noise over time.
If there is a groove in the drive shaft for the 'C" clip to hold the spring in place I would put the spring on. my .02

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Re: GL1200 Drive Shaft Damper Spring

Postby Rednaxs60 » Thu Mar 24, 2016 9:29 pm

twocams wrote:I had an 84 Interstate for 12 yrs. got it when it was 4 yrs old. Had 50,000 on when sold. But never had any issues with drive shaft clunking or anything related. But loose u-joints and slop in the splines, gears wearing in the diff. will all cause noise over time.
If there is a groove in the drive shaft for the 'C" clip to hold the spring in place I would put the spring on. my .02

twocams


Hear you on all these possibilities. Haven't found a reference to a c-clip on the 1200s. This is one of those engineering differences between years that is nice to know so that a person can compensate for the difference. Talked to a fellow over in Langley today and it was about the radio in his '86. Apparently Panasonic was very active back then and changed the radio design every year for what ever reason.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

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twocams
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Re: GL1200 Drive Shaft Damper Spring

Postby twocams » Fri Mar 25, 2016 1:09 pm

I think because the name Panasonic means they are not Goldwing. they do as they please. Goldwing wasnt the only one using this radio at any given time. Therefore may have been improved/disimproved to fit other bike needs? :? :D :o :shock:

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