Loud fifth gear

[chuck500cc]

Fifth gear is real loud. Shifting is butter smooth. All other gears are quiet but fifth has a loud wine. Fluid level is correct/recent change but I did not have the chance to hear it before fluid change. I used 80-90w GL-1. It's not jumping out of gear, tranfer case fluid is good. Ideas?

 

[ctmustang]

loud 5th gear

Don't believe there is much to worry about. Mine hsa done this since I have owned it. many miles later still the same noise and no problems. If I'm not mistaken it is the gear mesh. Have had older cars and trucks in the shop and made similar noises esp. in 5th gear.
C.T>