service rear differential


Information and questions on GL1800 Goldwings (2001-2017)
Post Reply
R Robbins
Posts: 10
Joined: Sat May 27, 2017 3:40 pm
Location: Arcadia, Fl
Motorcycle: 2003 Honda goldwing1800

service rear differential

Post by R Robbins »



i live in Florida were it is hot and I going to service the differential and just wondering if I could use synthetic gear & axle Lubricant SAE 75W-140 instead of SAE 80. also how hard is it to Replace the clutch, or should I take it to Honda and have them do it. sorry I have a 2003 gl1800


User avatar
Steve F
Posts: 505
Joined: Thu Apr 07, 2011 8:25 pm
Location: Grand Canyon State!
Motorcycle: 1976 Honda CB750F Cafe' (sold :>( )
'03 GL1800
DARKSIDE RIDER

Re: service rear differential

Post by Steve F »

First you're talking about servicing the "final drive" (No differential) and then you're talking about the clutch. What's up with the clutch?
The final drive usually only requires draining out the old and in with the new. And synthetic hypoid gear oil should be fine, but unnecessary. A word of advice here, when you go to drain out the old oil, be sure you remove the upper cap first BEFORE you take off the lower one. Some have removed the drain cap, only to discover the fill cap (upper one) is stuck and can't be removed, and thus no way to fill it back up, and then you're stuck.
Is your clutch slipping or something? Are you thinking about bleeding the clutch?
"To ride is the reason, the destination's the excuse."
R Robbins
Posts: 10
Joined: Sat May 27, 2017 3:40 pm
Location: Arcadia, Fl
Motorcycle: 2003 Honda goldwing1800

Re: service rear differential

Post by R Robbins »

SORRY I WAS TALKING ABOUT TWO THINGS NO THE CLUTCH IS NOT SLIPPING AS SOON AS YOU LET OUT OF THE CLUTCH HANDLE ABOUT 1/4 OF A INCH THE BIKE STARTS MOVING, AND IT IS STARTING TO CHATTER A LITTLE. AND ON THE DIFF SERVICE I WAS JUST WONDERING IF SYNTHETIC 75W-140 WOULD BE BETTER THEN 80 W
User avatar
MikeB
Posts: 3323
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade
184K Miles
2017 - GL1800 Audio Comfort
14K Miles
Contact:

Re: service rear differential

Post by MikeB »

Clutch: Are the levers chrome? If they are not black then they are aftermarket and the lever may be allowing the clutch to engage early. Try using the OEM levers if this is the case.

If not the case, flush and replenish and then properly bleed the clutch hydraulic system.

As to the rear end, one thing to know is, it is not a differential. It is a final drive. A differential works totally different than the final drive on your Goldwing.
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
R Robbins
Posts: 10
Joined: Sat May 27, 2017 3:40 pm
Location: Arcadia, Fl
Motorcycle: 2003 Honda goldwing1800

Re: service rear differential

Post by R Robbins »

ok thanks the levers are chrome, so I will flush and bleed the clutch hydraulic system. thanks again. R Robbins
User avatar
MikeB
Posts: 3323
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade
184K Miles
2017 - GL1800 Audio Comfort
14K Miles
Contact:

Re: service rear differential

Post by MikeB »

Keep in mind the levers on the 1800 are adjustable. Make sure they're adjusted so that they are all the way out before you assume that there is a problem with the system.
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
R Robbins
Posts: 10
Joined: Sat May 27, 2017 3:40 pm
Location: Arcadia, Fl
Motorcycle: 2003 Honda goldwing1800

Re: service rear differential

Post by R Robbins »

thanks for the advise I check the adjustment. tomorrow after noon when I get off work. thank you again.
User avatar
Ghostman
Posts: 350
Joined: Fri Aug 14, 2009 10:52 am
Location: Midwest
Motorcycle: gl1800

Re: service rear differential

Post by Ghostman »

Also by any chance do you have Kury grips on your bike? Between the Kury grips and aftermarket levers youll find sometimes clutch engagement issues with 1800s as they get older.
User avatar
mterraci
Posts: 144
Joined: Wed Feb 22, 2017 7:52 am
Location: Belleview, FL
Motorcycle: 2007 Honda Goldwing

Re: service rear differential

Post by mterraci »

I live in Florida, use Amsoil 10W40 in the engine and Amsoil Severe Gear 75W90 in the rear drive. No problems at all.
User avatar
Viking
Posts: 3708
Joined: Wed Sep 29, 2010 6:59 pm
Location: North Bay, Ontario, Canada
Motorcycle: 2009 GL1800 AD
1987 Harley Softail Custom
1974 Harley FLH (sold)
1965 Harley FLHE (sold)
1957 Harley Chopper (sold)

Re: service rear differential

Post by Viking »

I would use 75W90 as well because 75W140 could be a bit thick when it gets warm, in colder climates, and might not move as freely. However, because you live in Florida and would never experience temperatures below about 60 F degrees, you can use the heavier gear lube.
It ain't about the destination - it's all about the journey

Image
R Robbins
Posts: 10
Joined: Sat May 27, 2017 3:40 pm
Location: Arcadia, Fl
Motorcycle: 2003 Honda goldwing1800

Re: service rear differential

Post by R Robbins »

R Robbins wrote: Thu Aug 03, 2017 5:12 pm i live in Florida were it is hot and I going to service the differential and just wondering if I could use synthetic gear & axle Lubricant SAE 75W-140 instead of SAE 80. also how hard is it to Replace the clutch, or should I take it to Honda and have them do it. sorry I have a 2003 gl1800
THANKS BLEEDING THE CLUTCH DID THE JOB THANKS
User avatar
GoldWingrGreg
Posts: 811
Joined: Tue Aug 24, 2010 7:18 am
Location: Zephyrhills, Florida
Motorcycle: 89 GL1500
03 GL1800
04 GL1800(abs)
05 GL1800(abs)
07 GL1800(abs)
Contact:

Re: service rear differential

Post by GoldWingrGreg »

R Robbins wrote: Thu Aug 03, 2017 5:12 pm i live in Florida were it is hot and I going to service the differential and just wondering if I could use synthetic gear & axle Lubricant SAE 75W-140 instead of SAE 80. also how hard is it to Replace the clutch, or should I take it to Honda and have them do it. sorry I have a 2003 gl1800
Here at JustWings - GL1800 repair we only use Honda fluid, and Honda calls for 80w-90, not 75w-140. As for your clutch, it can be done while on its center stand. However, that is usually not something a DIYr will do. If you need help feel free to call, I offer help over the phone.


Post Reply