Transmission Whine noise (RTLO 16713A)

Some slight whine can be completely normal. Check magnetic plug and see if there’s any metal of sorts other than just wear metal in it. Transmission cannot be rebuilt in the truck it must be removed. Back box can be removed and repaired while transmission is still in truck. Pretty good job to R&R a unit for a folks first initiation to transmission work. I came to like doing it and jumped at chances to do bench jobs. When I used to be worth something. Used to pay 9 hours to replace a clutch in FLDs and such. Be a good idea to check for metal and make certain the correct oil, (50 wt synthetic), is installed.

 

If you get into that back box you better know what you are doing. Those gears need to be timed.

 

I'd take it to a good transmission guy and have it removed and gone through. Like said - check for metal fragments at the plugs first - or sample oil at a lab.

Re man transmissions are assembly line, tolerance replaced temporary fixes.

I have limited mechanical skills, but enough IQ to know it's not a task I would engage and learn on the fly if it was my sole income generator.

 

Whines can travel the driveline. Noise originating further back can come up the driveline, up the stick, and you assume trans issues.

You can't rebuild the trans from the back. You can rebuild SOME aux sections, but not all. Metric Fullers for example, the range fork is driven from the top plate of the main box, into the aux section.

The top plate has to be removed to remove the aux section. So pretty much not serviceable in truck.

Your RTLO, yes, you can remove the rear section. Is this truck new to you, or do you have quite a few miles on it?

Have you verified correct driveline angle?

 

Whine in all gears or just in OD? How many miles on the truck…?

 

You may have multiple problems that have slowly come to light.

You turned the driveshaft and felt if it’s smooth or has resistance….?