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Old 03-24-2011, 08:31 PM   #1
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1989 34.5' Airstream 345
Jamestown , Kentucky
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Caution, for those running Gear Vendors Units

Service, every oil change, Service

as I was discussing with a forum member from Florida.

Very few service these great Units as recommended.



Quote, G.V. service bulletin , SPECIFICATIONS:
Net Weight 32-46 lbs depending on application hardware.
Ratio - .78:1 pr 1:1 (reciprocal 1:1.28
Mechanically direct, hydraulically overdriven DeNormanville design.
Long Life Epicyclic planetary.
Solenoid control valve 6-12 volt negative ground @ 2amps.
650-700psi relief valve shift circuit.
Low parasitic loss common vertex Raybestos clutch.
Gross Combined Weight Rating 30,000lbs recreation (25K commercial)
Pressurized lubrication circuit to planet pinion bearings, roller clutch, input shaft pilot, planet thrust surfaces, and ring gear.
Pressurized 2 stage permanent filter circuit.
High speed Dual Row caged needle planet bearings.
Efficient Single stroke/rev plunger pump with non-return valve.
Fluid capacity 28zo/flat sump or 48oz/deep sump.
Fluid type - GM#1052271 petroleum based or GM#12346190 synthetic.
18 Elements single row roller clutch rated to 4500lbs spike torque.
Horsepower limitations - 1200+ call GEAR VENDORS for applications above 1200hp.
Recommended service interval - change fluid every 5,000 miles depending on severity of duty.
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Old 05-07-2011, 01:42 PM   #2
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I am Now running a Shaffer's Synthetic, Transmission fluid and will drain and change every 3 to 5,000 miles.

So far so very good
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Old 05-07-2011, 02:22 PM   #3
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Back when I bought mine the service interval was every 10 K with ATF. Shortly after that they changed it to every 10k with the Syntor synthetic oil that is used in my Dodge transmission.
Now it looks like they halved that. I did change mine religiously but still had enough problems that I finally got rid of it.
Hopefully they are doing better now as a few years have past.
Looks like we are not too many miles apart.
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Old 05-07-2011, 02:44 PM   #4
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Im using amsoil synthetic. I change it every oil service at 3-5k aswell.

Vinnie
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Old 05-07-2011, 04:54 PM   #5
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1989 34.5' Airstream 345
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Quote:
Originally Posted by RickDavis View Post
Back when I bought mine the service interval was every 10 K with ATF. Shortly after that they changed it to every 10k with the Syntor synthetic oil that is used in my Dodge transmission.
Now it looks like they halved that. I did change mine religiously but still had enough problems that I finally got rid of it.
Hopefully they are doing better now as a few years have past.
Looks like we are not too many miles apart.
Yes, we get down your way quite often.
Byrdstown for lunch. dinner and music on Friday, Saturday on the square. the Dixie cafe

Sargent York Park, Mill on 127 and such.
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Old 05-07-2011, 05:58 PM   #6
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Quote:
Originally Posted by Airslide View Post
Im using amsoil synthetic. I change it every oil service at 3-5k aswell.

Vinnie
That's almost overkill, but I like it! When you change to synthetic, is it as simple as just switching over, or should some kind of cleaning be done. Most guys I've met that run amsoil claim to not change it for 10k, or so. I've never believed them! What's the deal, they make it in multi-grade for the diesel and 90 weight for the o'drive and rear end? Transmission?
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Old 05-07-2011, 06:08 PM   #7
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Mike, I dropped the finned Pan, cleaned the filter and inside, outside with a parts cleaner.

re assembled and filled with fresh synthetic Transmission fluid. I used schaeffer's. what we use on the farm.
But any synthetic with specs the same as, or better than, and compatible with Dextron will work.

Schaeffer's ALL-Trans Supreme Transmission Fluid for Dexron ...




Schaeffer’s 0204 SAT ALL-TRANS® Supreme Automatic Transmission Fluid ... ALL-TRANS® Supreme is a full synthetic transmission fluid ...
www.schaefferoil.com/204_transmission_fluid.html - Cached

AMSOIL - Comparative Motor Oil Testing




Manufacturer of synthetic oil, premium synthetic lubricants, synthetic motor oil ... The size of the scar left as a result of the test determines the ...
www.amsoil.com/comparison/motor-oil.aspx -
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Old 05-08-2011, 12:02 AM   #8
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Quote:
Originally Posted by Mike Leary View Post
That's almost overkill, but I like it! When you change to synthetic, is it as simple as just switching over, or should some kind of cleaning be done. Most guys I've met that run amsoil claim to not change it for 10k, or so. I've never believed them! What's the deal, they make it in multi-grade for the diesel and 90 weight for the o'drive and rear end? Transmission?
Hi Mike,

My GV is a new unit with about 13k on it now. The first time I ran the GM fluid that GV specs for it. I let it go for about 7000 miles and it would disengage hard after that many miles. Now im running the amsoil and when coming to a stop it falls out like butter now and engages nicely too. I think I will only go as far as 5k. I bought a whole case of the amsoil and it was about $160.00 dollars. Its good for about 11 oil changes.

Vinnie
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