trans swap


Information and questions on GL1100 Goldwings (1980-1983)
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BadBowTie
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1998 gl1500 se

trans swap

Postby BadBowTie » Wed Jul 11, 2012 5:04 pm



will an 82 or 83 trans work in an 81?



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WingAdmin
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Re: trans swap

Postby WingAdmin » Sun Jul 15, 2012 8:37 pm

BadBowTie wrote:will an 82 or 83 trans work in an 81?


If you're talking about the physical gears, then yes, they are interchangeable.

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BadBowTie
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Re: trans swap

Postby BadBowTie » Sun Jul 15, 2012 9:44 pm

do u have to take the motor apart @split the case to do this?

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Re: trans swap

Postby WingAdmin » Sun Jul 15, 2012 11:21 pm

Yes. It's major surgery to get to the transmission gears.

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dingdong
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Re: trans swap

Postby dingdong » Mon Jul 16, 2012 8:04 am

What type of problem are you having that you need to change out the transmission? Just curious!
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BadBowTie
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Re: trans swap

Postby BadBowTie » Mon Jul 16, 2012 11:32 am

no problem, wanted to drop rpm 500 on hwy. but if u have to do a complete tear down i won't be doing it at this time. the bike is in excellent condition & only has 36,000 on it now, it had 32,000 on it when i bought it in feb. do u know of any other way to knock the rpm down. i already know that the 81 has the highest rear drive ration of the old wings. is there any after market gearing that would do this?

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scotterichmond
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Re: trans swap

Postby scotterichmond » Mon Jul 16, 2012 3:43 pm

The 75 is accually taller geared, but I don't knoe if they can be swapped.

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RoadRogue
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Re: trans swap

Postby RoadRogue » Mon Jul 16, 2012 7:47 pm

why are you worried about 500 rpm at hiway speeds,these bikes are very happy spinning right up into the redline,and dont like to be lugged. 8-)
Ride safe, Todd
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BadBowTie
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Re: trans swap

Postby BadBowTie » Mon Jul 16, 2012 7:58 pm

because it gets 10 mph better gas milage with 500 rpm grop

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RoadRogue
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Re: trans swap

Postby RoadRogue » Mon Jul 16, 2012 8:27 pm

But the engine has to work harder at the lower rpm to maintain a given speed, its a trade off. I use the guys that run darkside tires on the 1500s as an example . the 175-60-16 tires that many use are in fact smaller in overall diameter than the stock MC tire and therefore causes them to run at a higher rpm for a given road speed. They all report that fuel milage is unchanged, this may be due to the fact that it takes less energy to bring the bike upto any given road speed. Those that run the Austone Taxi tire report that it is actually a larger diameter tire and does lower their rpm at a given speed and they report no change in fuel consumption. I think this is because it takes more energy to accelerate the larger diameter tire, even though you are traveling farther per tire revolution. Changing overall tire diameter is the same mathamatically as changing the final gear ratio

If you are looking for a modest boost to your gearing to help lower your hiway rpm you could swap out the rear drive for one from a 83. It is a very modest improvement, something like going from a 3.10:1 to a 3.09:1 ratio. Hardly worth the effort unless you got the drive for free. 8-)
Ride safe, Todd
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BadBowTie
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Re: trans swap

Postby BadBowTie » Mon Jul 16, 2012 8:41 pm

from what i have seen the 81 has the second highest final drive ratio of all the wings.
75-79 is3.40 to 1
80-81 is 3.09 to 1
82 is 3.10 to 1
84-97 is 2.83
but if i do the 2.83 ratio won't i have to much truble riding the cluth to get started from dead stop. if not will the 2.83 fir in a 81?

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Re: trans swap

Postby RoadRogue » Mon Jul 16, 2012 11:17 pm

I maybe wrong but I dont believe that anything after 83 will bolt up, I will look into it some more and get back to you.
Ride safe, Todd
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RoadRogue
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Re: trans swap

Postby RoadRogue » Tue Jul 17, 2012 12:04 am

Ok I checked my facts, you have what you have and changing out the final drive isnt going to make any difference. If you really need that rpm drop you will have to either spend a bunch on splitting the cases and swaping out the gears from the 83 or swap out the whole motor for an 83 or buy an 83. You have what you have, it might be fun to see if you can find a taller tire, there are no car tires that will fit the 1100. I tried to find one for a couple of years and finally gave up and bought a 1500. If you want to save gas you are going to have to ride slower. Sorry 8-)
Ride safe, Todd
Over night campers welcome

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SteveB123
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Re: trans swap

Postby SteveB123 » Tue Jul 17, 2012 6:46 pm

BadBowTie wrote:from what i have seen the 81 has the second highest final drive ratio of all the wings.
75-79 is3.40 to 1
80-81 is 3.09 to 1
82 is 3.10 to 1
84-97 is 2.83
but if i do the 2.83 ratio won't i have to much truble riding the cluth to get started from dead stop. if not will the 2.83 fir in a 81?


Are you trying to swap rear ends, or transmissions?
What will your effective final drive ratio be with your 81 5th gear, and whatever rear end you're proposing?
Are all the fifth gear ratios the same?

Questions, questions...... ;)
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BadBowTie
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Re: trans swap

Postby BadBowTie » Tue Jul 17, 2012 6:51 pm

my objective is to drop 500 rpm at 70 mph. no the final drives are not all the same.

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BadBowTie
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Re: trans swap

Postby BadBowTie » Tue Jul 17, 2012 6:52 pm

sorry , no all 5th gears are not the same

goldminerusa
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Re: trans swap

Postby goldminerusa » Wed Jul 18, 2012 4:03 pm

Reading RoadRogues wisdom is sound and valid, but what size rim is on the bike? Finding a taller 16" tire might be next to impossible, but changing the rim to 17" and keeping the present final drive should give you the additional diameter and reduce the final ratio. My `82 has 19" front and 17" rear. Saying that, there is a somewhat less availabilty of tires available with this combo. Got a 17" rim for this guy RoadRogue?

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BadBowTie
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Re: trans swap

Postby BadBowTie » Wed Jul 18, 2012 4:40 pm

i have a dunlop elite 491 17" tire on rear

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RoadRogue
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Re: trans swap

Postby RoadRogue » Wed Jul 18, 2012 9:18 pm

The 81 came with a 17" rim so like I said before hes pretty much stuck with what hes got without spending a whole bunch of money. 8-)
Ride safe, Todd
Over night campers welcome

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BadBowTie
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Re: trans swap

Postby BadBowTie » Wed Jul 18, 2012 9:53 pm

looks like it unless i find a final drive from a 83 cheap

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RoadRogue
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Re: trans swap

Postby RoadRogue » Wed Jul 18, 2012 10:58 pm

The 83 final drive isnt going to help after all , the numbers are not enough to give you what you want. Sorry . 8-)
Ride safe, Todd
Over night campers welcome

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BadBowTie
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Re: trans swap

Postby BadBowTie » Thu Jul 19, 2012 8:53 am

but it will give me some

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SteveB123
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Re: trans swap

Postby SteveB123 » Fri Jul 20, 2012 6:26 am

BadBowTie wrote:looks like it unless i find a final drive from a 83 cheap


From my reading, the big difference between the 82 and 83 is the transmission secondary reduction ratio:

82: .973
83: .897

That will involve a swap, or heavy surgery.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
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BadBowTie
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Re: trans swap

Postby BadBowTie » Fri Jul 20, 2012 9:14 am

yes i agree, the bike is in to good of condition to do this at this time. it runs great. i just syned the carbs last weekend. was told this was already done. if it was it was a crappy job of it. i have never synced carbs before & it is running so much smother not. am in the middle of my first tank of gas since the sync. hope milage is better now.
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scotterichmond
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Re: trans swap

Postby scotterichmond » Fri Jul 20, 2012 1:15 pm





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