Trans and Rear oil Choices

Start oil threads here so they can be ignored and/or ridiculed by most of us (except for those hardcore few that live for that kinda stuff).
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Here's the place for you to debate what oil is best. Post your oil related topics her so we don't clutter up the other sections. Most people avoid oil threads like the plague.
JNRIII
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Trans and Rear oil Choices

Post by JNRIII » Fri Sep 29, 2017 9:14 pm

Mr Wazzock posted » Tue May 23, 2017 7:33 pm

Engine: 20W-50, or 20W-60, fully synth.
Gearbox: 75W-90, fully synth[/b]. Thicker makes cog swapping a bit smoother.
Final drive: 85W-140 gear & rear axle oil. Again thicker discourages it leaking out past the input shaft seal*. For the same reason, only fill to 20cc less** than what the book says (capacities are different depending whether 1wd or 2wd). E.g. 1wd, 90cc; 2wd, 110cc (I think).

I wanted to know, why gear oil 75w90 in the trans? I think the manual says 20w50

Also, why 85-140 in the rear end ? Again I think the manual says 75-90 .

Can you explain your experience and reasons for a newbie ?????

Any other opinions ?????

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vetsurginc
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Re: Trans and Rear oil Choices

Post by vetsurginc » Fri Sep 29, 2017 10:22 pm

Oil questions are always arguable. I like Redline oils for the antishock additives. Especially for gearbox and FD. The cushion effect quiets the gearbox, reduces wear. Ditto for FD. The redline oils have a variable viscosity. So where oil is getting thrown rather than pumped, they work fine. When they get hot, they don't thin as much, maintaining protection.

Anywho those are my theories. I'm at 42,000 km with no engine, gearbox, or FD problems. Cost for the volumes used are minimal for the peace of mind received.

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chaos2
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Re: Trans and Rear oil Choices

Post by chaos2 » Fri Sep 29, 2017 11:03 pm

you're fine sticking to the factory recommendations, and probably fine experimenting to find something that works better.
past afflictions include TR motocars and bikes, R60/2 & a R65, MGs, and a Citroen.
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Re: Trans and Rear oil Choices

Post by dneprlover » Sat Sep 30, 2017 8:18 am

I find your question a bit strange but can see your point;

Why indeed, would anyone want to put specialist gear oil in a gearbox when perfectly good engine oil is available?

Not sure of the reasons but most countries apart from the USA have gear oil recommended for first choice with suitable engine oil as a substitute if genuine gear oil is not available.
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Re: Trans and Rear oil Choices

Post by gobium » Sat Sep 30, 2017 8:40 am

Ural owners in US like to think if they put expensive Harley oil in Ural everything will last longer, made them feel good to spend extra $. Just Do what manual said, it is a ural.
I rebuild a ural recently for an owner in jersey, they put the best and most expensive oil in engine and fd (red line).
Guess what? FD rebuilt 2x and main crank bearing gone bad at 30,000 km.

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Re: Trans and Rear oil Choices

Post by hotflash44 » Sat Sep 30, 2017 8:50 am

JNRIII, i use Redline all around, noticed that many syn oils come in slightly different viscosity values, just get one the is close to what is recommended and your good.IMHO. oil recommendations are all over the place,99.9 are good quality and will work well in any machine,seems if you don't spin a bearing/puke a rod then your oil is the best. many folks use Castrol oil all around as recommended by the factory hard to find fault. Call me uninformed ,but most modern motorcycle manufactures research the oil for their product and provide recommendations in the manual. I would bet that Ural doesn't have a R/D facility for oil and probably has used Castrol 20w50 successfully for many years. :wink: :cheers:
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stagewex
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Re: Trans and Rear oil Choices

Post by stagewex » Sat Sep 30, 2017 11:09 am

I've used the factory recommendations for 10 years, never any problem.

I've P-Touched under the lid to my trunk so I don't stray into the Land of Miraculous Miracle Lubricants.
If Castrol is not available pretty much any 20-50 will do. Same with the Valvoline. As long as it is the same spec's and you put in the correct amount...
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chaos2
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Re: Trans and Rear oil Choices

Post by chaos2 » Sat Sep 30, 2017 1:31 pm

This stuff is hard to find but specially formulated for bad metallurgy. :lol:
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past afflictions include TR motocars and bikes, R60/2 & a R65, MGs, and a Citroen.
Now a 2012 FF GU and an 87 K75s
dual K&N cones on PVC intake, 40/137.5
Raceway needles
Modtop exhaust
$29 VW Hydraulic steering dampener

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Tomcatfixer
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Re: Trans and Rear oil Choices

Post by Tomcatfixer » Sat Sep 30, 2017 2:55 pm

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- Chad

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Current rides:
2015 Ural cT "Mobile Chernobyl", 1999 Ural Tourist "Desert DisGrace: the Iron (Oxide) Curtain", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

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2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
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Ironhand
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Re: Trans and Rear oil Choices

Post by Ironhand » Mon Oct 02, 2017 2:26 pm

I would be interested in hearing if there has ever been a documented, oil-related failure, whether the engine, FD, or trans. For every idiot like me who spends $15/quart on fancy oils, there must be thousands of rigs running around out there with the cheapest, whatever you can buy on sale at Walmart oil with zero issues.
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Re: Trans and Rear oil Choices

Post by hotflash44 » Mon Oct 02, 2017 3:00 pm

Ironhand,well some people are just cheap everything they buy is cheap, i for one just like the best for many things, cigars, steaks,shoes, etc. i have researched the benefits of syn oil ,and like what i read so i buy it for my 2016 GU. the extra 20 bucks isn't a issue, and im a retired guy and not rich by any means. like i said in another post when i get 50,000 km on the bike i can swear that the syn oil helped, if the engine/trans/final drive go bad its crappy Russian metallurgy of course! :foilhead: :cheers:
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Re: Trans and Rear oil Choices

Post by gobium » Mon Oct 02, 2017 3:08 pm

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hotflash44
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Re: Trans and Rear oil Choices

Post by hotflash44 » Mon Oct 02, 2017 5:01 pm

opinions,opinions, got to love the oil threads! :sarcasm: :cheers:
drive a 2016 gear up asphalt grey .Air America CIA circa 1967/8 Vung Tau Viet Nam USS Tutuila ARG-4 (AND JUST A TOUCH OF AGENT ORANGE!)

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Lee Pape
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Re: Trans and Rear oil Choices

Post by Lee Pape » Tue Oct 03, 2017 8:59 am

For most of the last 17 years that I have owned Ural I have used some form of dino oil. When it still had extra goodies in it I was using a 20W/50 diesel oil. Now those goodies are gone also.
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hotflash44
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Re: Trans and Rear oil Choices

Post by hotflash44 » Tue Oct 03, 2017 9:41 am

:? Lee ,food for thought,ZDDP is getting less and less all the time ZDDP was used in at least 1200ppm for many years especially in the old engine technology to make them last longer, now fast forward the high tech designs of the newest engines with cats cant use high ZDDP and the Government has made oil brewers reduce the amount of ZDDP to around 800ppm. this might be a issue for old classic engines even the Ural. As i understand Synthetic oils either have more ZDDP or some qualities that simulate ZDDP. what you think! :foilhead:
drive a 2016 gear up asphalt grey .Air America CIA circa 1967/8 Vung Tau Viet Nam USS Tutuila ARG-4 (AND JUST A TOUCH OF AGENT ORANGE!)

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