gear oil - Triumph Forum: Triumph Rat Motorcycle Forums
Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

 4Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 23 (permalink) Old 03-16-2017, 07:32 AM Thread Starter
New Member
Grand Prix 125
Main Motorcycle: triumph thunderbird sport
 
Join Date: May 2012
Location: perth australia
Posts: 28
Other Motorcycle: t150v
Extra Motorcycle: bsa441vs/triumph tr5t
gear oil

HI
My triumph tr5t gear box uses EP90, so what oil can i use, I have got penrite 10/40W GL$ gear oil will this do, ive been told GL5 is to harsh

Mark
bsa44161 is offline  
Sponsored Links
Advertisement
 
post #2 of 23 (permalink) Old 03-16-2017, 08:31 AM
Senior Member
Formula Extreme
Main Motorcycle: '71 Triumph T120R "Daisy"
 
Pharisee's Avatar
 
Join Date: Dec 2013
Location: Bedfordshire, England, UK
Posts: 881
Other Motorcycle: '68 Triumph T90 "Lilly"
Extra Motorcycle: '55 AJS Model 18S "Bess"
You've answered your own question... Use EP90 gearbox oil to GL4 specification.
For example... This stuff (other brands are available)

10w40 is too thin for Triumph gearboxes.
Pharisee is offline  
post #3 of 23 (permalink) Old 03-16-2017, 09:25 AM
Senior Member
Powerbike
Main Motorcycle: Tiger Sport
 
Paul49's Avatar
 
Join Date: Oct 2009
Location: Peak district
Posts: 336
Other Motorcycle: Tiger 800 XRx
Extra Motorcycle: Ariel Huntmaster
Most old bikes used a straight 50w engine oil in the gearbox, wasn't there some issue of EP oils attacking the bushes in our old bikes. I remember somebody going into great depth on the subject in Nacelle (tomcc club mag).

No definitive answers but have a read of this for the varying opinions:

http://forum.arielownersmcc.co.uk/vi...84ff0&start=10
Paul49 is online now  
 
post #4 of 23 (permalink) Old 03-16-2017, 10:32 AM
Senior Member
Team Owner
Main Motorcycle: 1971 t120r
 
rambo's Avatar
 
Join Date: Mar 2005
Location: exmouth devon uk
Posts: 5,478
Other Motorcycle: triumph rocket 111
Extra Motorcycle: BSA Spitfire
Garage
EP80/90 or anything close will do.Sometimes listed as a 75/90 etc in GL4 type.Never had any corrosion of the yellow metal so far in a gearbox.Not into all the theories of thick or thin oil but i am guessing that hot thick oil will stay on those spinning cogs a bit longer and not fly out of the shaft bushes too fast.Spec says to use the thick gear oil so i think Triumph tested it all out.

Now,where did that bit fall off ?
rambo is online now  
post #5 of 23 (permalink) Old 03-17-2017, 12:25 PM
Senior Member
SuperBike
Main Motorcycle: 1973 Triumph TR7RV
 
TR7RVMan's Avatar
 
Join Date: Oct 2013
Location: Pleasant Hill, CA USA
Posts: 1,457
Other Motorcycle: 1964 Triumph Mountain Cub
Hi All, If a person was to use synthetic gear box oil, what are people using in USA?

My trans oil change is due soon & I've been thinking about synthetic.

On the web it is said some newer gear oils damage bronze bushings which we have. Only Staylube non synthetic mentions it doesn't harm. Others no mention at all.

On my bike & many others after a few hours continuous riding the gear shifter seems harder to move. Not the pedal, but like the cam plate & shift forks. Bike has done this from new. Many bikes do this. Once motor cools, it's back to normal.

Not a clutch issue at all. It's in the trans, & that's not really a problem, but I was wondering if synthetic would make a difference. It's suppose to make gears last much longer according to their info.
Don
Hedofart likes this.
TR7RVMan is offline  
post #6 of 23 (permalink) Old 03-17-2017, 05:34 PM
Senior Member
Team Owner
Main Motorcycle: 1971 t120r
 
rambo's Avatar
 
Join Date: Mar 2005
Location: exmouth devon uk
Posts: 5,478
Other Motorcycle: triumph rocket 111
Extra Motorcycle: BSA Spitfire
Garage
Normal mineral oil has worked very well in mine so i see no need to experiment.Wear is very minimal at 42,000 and Lunmad has near 100,000 on his using 20/50 engine oil in the gearbox.From that,it appears that any oil is better than none.
When you think that a car gearbox using EP oil can go over 100,000 miles with no oil change at all,just a top up if there is a spill from driveshaft removal,not much will wear in a Triumph box with much shorter change intervals.For what it costs,i change the gear oil at 1000 miles and the cost is about £2.I do use Mobil fully synthetic gear oil in my Rocket 111 rear wheel drive and changes are at about 20,000 miles.There is just 200cc and after about 2000 miles,the oil is black and full of metal particles.Apparently,this is normal for this unit.I change that every 2000 miles now.
For an old Triumph,experimentation is not really worth the effort if there is a perfectly good EP75-90 mineral GL4 oil available.

Now,where did that bit fall off ?
rambo is online now  
post #7 of 23 (permalink) Old 03-18-2017, 05:28 AM
Senior Member
Powerbike
Main Motorcycle: Tiger Sport
 
Paul49's Avatar
 
Join Date: Oct 2009
Location: Peak district
Posts: 336
Other Motorcycle: Tiger 800 XRx
Extra Motorcycle: Ariel Huntmaster
I asked a pal who has a dozen old bikes including a Bonnie, T21, Commando & 4 Vin's. He only said some EP oils are harmful to our boxes.

I asked Opie oils for their recommendation for my Ariel Huntmaster gearbox:
http://www.penriteoil.com.au/product...id_products=81

I looked on Dragonfly's Ariel website for their oil for a Burman GB box:
https://www.draganfly.co.uk/index.ph...product/20872-

I am not aware if the yellow metal content in old Triumph boxes is similar, I've just been looking for my old bike. Lots of opinions but not many facts on t'internet eh.
Paul49 is online now  
post #8 of 23 (permalink) Old 03-18-2017, 06:00 AM
wol
Senior Member
SuperBike
Main Motorcycle: T140 bitza
 
Join Date: Oct 2010
Location: Carmarthen UK
Posts: 1,529
Other Motorcycle: T140 bitza project
Extra Motorcycle: yes please
i started to read up on GL4 and GL5 - a lot is written that GL5 can damage bronze / yellow metal in bearings - however most that is written is several years old - plus a lot of GL5 oils state that they are for universal use in 4 and 5 application - i gave up in the end as it was very confusing and contradictory --
Paul49 likes this.
wol is offline  
post #9 of 23 (permalink) Old 03-18-2017, 07:34 AM
Senior Member
Team Owner
Main Motorcycle: 1977 Triumph Bonneville
 
Join Date: Sep 2011
Location: Grass Lake , Michigan,USA
Posts: 4,403
Other Motorcycle: 1996 Ducati 900ss/cr
Extra Motorcycle: 2007 Ducati S4RS
I found some stated they were safe on the back of the bottle, though most did not. I've been using Harley synthetic trans lube since I have it around, with a bit of STP.
duc96cr is online now  
post #10 of 23 (permalink) Old 03-18-2017, 07:41 AM Thread Starter
New Member
Grand Prix 125
Main Motorcycle: triumph thunderbird sport
 
Join Date: May 2012
Location: perth australia
Posts: 28
Other Motorcycle: t150v
Extra Motorcycle: bsa441vs/triumph tr5t
gear oil

hi fellas
i looked around and read somewhere that gl5 gear and diff oil will take a small amount of soft metal with it, so they say stick with gl4 gear oil, i spoke too red line oil and they recommend their shock proof heavy oil synthetic and said its none aggressive to the bushes,
mark
bsa44161 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options
All posts must adhere to Forum Rules

Register Now



In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Gear Change Cover Oil? Buildup ThruxtonNewbie Air Cooled Twins Technical Talk 5 07-19-2016 07:47 PM
Oil pressure 72 T100R John72T100R Classic, Vintage & Veteran 13 06-13-2016 01:47 AM
Triumph T140E low oil pressure - One last question 2wheelride Classic, Vintage & Veteran 16 08-17-2015 02:03 AM
A few newb questions: Mr.Dudecool Classic, Vintage & Veteran 17 08-13-2015 02:34 AM
gear oil change Dave NEO Classic, Vintage & Veteran 13 04-07-2015 08:10 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome