Gearbox lube:

[JackG]

Has anyone used GL-5? I've been told a slight whine in 5th (915 gearbox) might be helped with using this. Any thoughts? I've always heard good things about Swepco.

Thanks,

Jack

[HarryD]

No clue about GL-5 oil in general but SWEPCO 201 is the stuff you want.

Per the Bird BBS Site:

"Multi-purpose gear lubricant for most manual gear boxes, stationary industrial or rolling stock. Features API GL-5 and MT-1 rated lubricant. Exceeds military specifications MIL-PRF-2105E. Oxidation, rust and corrosion inhibitors. Anti-catalyst and anti-foam inhibitor. Anti-wear inhibitors and extreme pressure (EP) additive. Adhesive/cohesive characteristics for climbing action. Pour point depressant. Limited slip characteristics. Reduces gear oil consumption as much as 50-75%. Improves equipment performance life, drops operating temperatures 8-18% (29-72øF or 0-22øC). Decreases unscheduled downtime. High temperature stability for outstanding wear control and cleanliness. Energy savings (electrical/fuel). Primary Markets are Construction, Dairies (milk processing), Crane and crane rental operations, Post offices and Local trucking. Industrial gear boxes, Standard shift transmissions and differentials."

[orange911]

John Walker recomends Kendall GL-5 80/90

[72targa]

Here's the basic spec (section 3.3):

http://www.api.org/certifications/en...pload/1560.pdf

Here are the details in the referenced ASTM Publication STP-512A:

http://books.google.com/books?id=ykX...sult&resnum=10

You most likely already have a GL-5 gear lube in your transmission. The whine could be an indicator of some required maintenance. That being said, a oil change cannot hurt to try.

[johns4949]

Royal Purple max gear oil 75w/90 Works alot better then Swepco