Rear drive spinning ??


Information and questions on GL1500 Goldwings (1988-2000)
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888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Rear drive spinning ??

Post by 888GoldDragon »



I have a problem and don’t know where to go next??
I do not think it’s the clutch, I could be in gear and crank the throttle and something spins there’s a slight grinding noise at the rear, something is spinning my RPMs go up, and I have no acceleration, I can back off a little bit it’ll grab it I can get acceleration.
It does not happen during deceleration. Only acceleration.
My u- joint boot is cracked I’m going to put a new boot on however there are no metal shavings in the boot.
I have not taken the u-joint out yet, so I don’t know the condition on the rear of the U joint I need to get a 17mm hex drive first.
The rear engine shaft splines look good
Front u-joint splines look good
Front driveshaft spines look good
Axle splines look good.

My main question I guess is due I take apart the rear end housing to check the splines on the rear of the driveshaft could that be the culprit, or should I definitely remove and change the U joint, or were there be another cause I’m not aware of??
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Andy Cote
Posts: 950
Joined: Sun Feb 27, 2011 11:38 am
Location: Windham, ME
Motorcycle: 2015 Goldwing, basic black

Re: Rear drive spinning ??

Post by Andy Cote »

Why are you eliminating the clutch from the discussion?
2015 Goldwing, basic black

Previously: GL1200 standard, GL1200 Interstate, GL1500 Goldwing, GL1500 Valkyrie Standard, 2000 Valkyrie Interstate, many other Hondas
888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Re: Rear drive spinning ??

Post by 888GoldDragon »

Because it happens without the clutch. I can be in the same gear and crank the throttle and it happens. But I have been known to be wrong a few times. That is why I’m asking. Should I be looking at the clutch also,
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Rambozo
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Re: Rear drive spinning ??

Post by Rambozo »

With it running on the center stand and the rear brake locked, put it in gear let out the clutch and see what is moving and what isn't.
joecoolsuncle
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Location: oxford, ar
Motorcycle: 1984 gl1200a

Re: Rear drive spinning ??

Post by joecoolsuncle »

Rambozo wrote: Tue Aug 09, 2022 5:29 am With it running on the center stand and the rear brake locked, put it in gear let out the clutch and see what is moving and what isn't.
this! put it in 5th gear and see if you can stall the motor at 5k rpm. note: only do this test for a few seconds, as the clutch will heat quickly.
Earl43P
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Motorcycle: 21 KTM390A
99 Valkyrie IS
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Re: Rear drive spinning ??

Post by Earl43P »

Have you disconnected the drive shaft from the final drive?
That will expose the pinion cup and drive shaft coupling, which is what I suspect has failed.
You mentioned a bad u-joint boot; that lets rain/water into the swingarm and if the drive shaft seal to pinion cup is bad, water enters the pinion cup and it'll rust and fail over time.

You should be able to just PULL hard and separate that last joint (pinion cup). None of your photos show that.
When all else fails, RTFM!

21 KTM390A “Hootenanny”
99 Valkyrie Interstate, “Favorite”
82 GL1100 Sold 3/17 (miss that ticket getter)
93 GL1500I Sold 3/20 (Meh, but put 56k miles on it)
04 ST1300 Sold 4/22 (Fast, fun, never “loved” it)
888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Re: Rear drive spinning ??

Post by 888GoldDragon »

No I have not separated driveshaft pinion cup yet. If the rear of the driveshaft to the final drive is bad, do I replace final drive also or can I rebuild?
Earl43P
Posts: 145
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Location: Farmington, PA
Motorcycle: 21 KTM390A
99 Valkyrie IS
04 Polaris Magnum 330

Re: Rear drive spinning ??

Post by Earl43P »

You can just replace the pinion cup.
Once you access it and determine if it is the problem, clean out the pinion cup and you can see one nut in the center.
Use an electric IMPACT on that nut, both taking it off and installing the new.
Expect to replace the drive shaft and install a new seal as well.

IF that joint is the problem.
When all else fails, RTFM!

21 KTM390A “Hootenanny”
99 Valkyrie Interstate, “Favorite”
82 GL1100 Sold 3/17 (miss that ticket getter)
93 GL1500I Sold 3/20 (Meh, but put 56k miles on it)
04 ST1300 Sold 4/22 (Fast, fun, never “loved” it)
888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Re: Rear drive spinning ??

Post by 888GoldDragon »

Yes, it looks like that was the problem, pinion gear. It was worn on the edge and no grease left only a thick paste that likes my magnet. Replacement parts on order. Thankyou everyone for the help and input. Hopefully I will be riding again before winter sets in.
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MikeB
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Motorcycle: 1998 - GL1500 Aspencade
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Re: Rear drive spinning ??

Post by MikeB »

888GoldDragon wrote: Sun Aug 14, 2022 6:57 pm Yes, it looks like that was the problem, pinion gear. It was worn on the edge and no grease left only a thick paste that likes my magnet. Replacement parts on order. Thankyou everyone for the help and input. Hopefully I will be riding again before winter sets in.
This is what my pinion and cup looked like in 2002 on a 1999 GL1500 with a little over 94,000 miles on it.




Back then I didn't know that the pinion and cup needed to be lubed with Moly Grease every 16,000 miles.
MikeB
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Re: Rear drive spinning ??

Post by 888GoldDragon »

My looks very similar, not as bad. And I have 110 000 miles on mine. Thanks for tip I didn’t know hay had to greased that often.
joecoolsuncle
Posts: 418
Joined: Sun Sep 26, 2021 6:10 am
Location: oxford, ar
Motorcycle: 1984 gl1200a

Re: Rear drive spinning ??

Post by joecoolsuncle »

888GoldDragon wrote: Sun Aug 14, 2022 6:57 pm Yes, it looks like that was the problem, pinion gear. It was worn on the edge and no grease left only a thick paste that likes my magnet. Replacement parts on order. Thankyou everyone for the help and input. Hopefully I will be riding again before winter sets in.
pinion gear is inside the final drive, are you referring to the pinion cup?
888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Re: Rear drive spinning ??

Post by 888GoldDragon »

Yes. Pinion cup. I checked final drive. It’s looks pristine. As well as pinion gear.
joecoolsuncle
Posts: 418
Joined: Sun Sep 26, 2021 6:10 am
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Motorcycle: 1984 gl1200a

Re: Rear drive spinning ??

Post by joecoolsuncle »

k. info like tat helps us common folk. good luck with the repair!
888GoldDragon
Posts: 22
Joined: Fri May 27, 2022 6:00 pm
Location: Calgary AB Canada
Motorcycle: 1994 1500 SE

Re: Rear drive spinning ??

Post by 888GoldDragon »

Thankyou all for your help, Andy you were right. It was a combination of both, pinion cup gear and the slave cylinder. The major problem was the slave cylinder, but when I had all the u-joint, drive shaft and final gear apart it was good to have a good inspection on all of it. The pinion cup gears were worn bad, glad I changed it before it was crucial, and greased everything. Hopefully get some good long rides in before the cold sets in.


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