Lawn Ranger 3 speed transmission oil weight

[Dkphillips 22]

Since I just got my Lawn Ranger restored I thought I would change the transmission oil. When I look at the Lawn Ranger owner's manual it states to use 40 weight oil but the transmission manual says to use 90 weight oil! Which one is correct? Any information from you Lawn Ranger or transmission guys would be appreciated.

Doug

[pfrederi 17,173]

Many will disagree but either one will work.  I have an L-107 purchased my my father in 1967.  She is still in use and I use her year round (see avatar). 48 years running and no tranny issues. She has run 40wt oil the entire time. Changed about every 10 years Shifts nicely in the cold.......

[Dkphillips 22]

Thanks for the info. Looks like I will be purchasing some 40 weight. 

Doug

[gwest_ca-(File Mod) 10,530]

Here is a 1965 service bulletin on the subject
http://www.wheelhorseforum.com/files/file/897-wh61-90-055-transmission-lube-1964-origpdf/

Garry

[callum12 256]

why didn't you post this about 2 days earlier!!? 
I have loads of SAE 40 oil but i went out and brought SAE 90.
haha oh well, these things happen. 
Callum 

[Dkphillips 22]

Garry,

The link you sent will not open. Some error as usual with some links. Evidently the bulletin says to use 40 weight oil based on other posts.

Thanks,

Doug

Sent from my iPhone using Tapatalk

Garry,

The link you sent will not open. Some error as usual with some links. Evidently the bulletin says to use 40 weight oil based on other posts.

Thanks,

Doug

Sent from my iPhone using Tapatalk

[gwest_ca-(File Mod) 10,530]

Perhaps this is readable
 

[Dkphillips 22]

Thanks for this info. Looks like 40 weight oil is in my future!!

Doug

Sent from my iPhone using Tapatalk

[bob's toy 32]

Well that answers my question as to what weight and type of oil to use in my transmission. Thank you all for the great information..

[Dkphillips 22]

Just bought a couple quarts of 40 weight oil today. Did not get the oil changed in the Lawn Ranger yet but probably will tomorrow. Always glad to help someone else "accidentally".

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[bob's toy 32]

I am a lead tech for Mustang Cat here in Houston and we use a 50wt gear oil in trans and final drive due to extreme wear factors. I think it will work. It gets 100+ in the summer so from what I see every day this is my first choice. The oil in the trans was not bad at all. Looked to have been kept serviced. No rusty oil and no metal at all.Will flush and run soon...almost ready to prime, lots of cleaning yet...

[953 nut 52,038]

     I doubt that a Lawn Ranger or any other manual shift garden tractor will generate enough heat to make a difference, I have 40 in all of mine.