Uni-Drive 5053 Questions

[71_Bronco 1,072]

Working on my '68 Commando 8, and I want to drain the transmission fluid and re-fill it to make sure there was no moisture or sludge. The shifter boot that's on it is in good condition (not sure if it is a replacement or not), but I ordered a new one anyway.

 

I have a couple questions though on this transmission.

 

1.) When I fill it, should I tip the back up a little bit to get a little extra oil in the trans? Or should I just fill it while level like the manual says? Not sure if a little extra oil will help or hurt it.

2.) Manual says to use 90 wt gear oil. Is this still the best fluid to use? Or should I flush it and switch to an ATF like the Hydros have?

3.) Does anything secure the shifter boot to the trans case? It looks like it slips on based on the parts diagram, but wasn't sure if I should use something like a hose-clamp or zip-tie to really make sure it stays put and doesn't leak?

 

The transmission doesn't leak as of right now, so I am not planning on a full tear down just yet. I will eventually, but if the oil looks clean, I will probably leave it for now. It goes in and out of gears fine (no excessive sticking).

 

Also, if there are any other items I should watch out for or look at, please feel free to let me know. This is my first uni-drive.

 

Thanks!

[ebinmaine 68,370]

Answer to question number one.

A little extra fluid in there certainly wouldn't hurt anything but it's not necessary.

 

Answer to question number two.

Stick with what is in there right now. If you have 90 w in there right now then put that back in.

You will probably find 85w 140 or 80w 90. I use 80w 90.

 

Answer to question number three.

Nothing secures that boot except for friction.

 

 

The other thing that comes to mind right away is that when you are draining the transmission be sure to use the plug that is on the very bottom of the transmission. Lots of us, including me, don't find that right away.

Also, while draining you will want to raise the front as much as you can do so safely. There is a bump in the middle of the bottom of the inside of that transmission that holds a lot of fluid in the front half.

If that tractor runs and drives okay you may want to pick up a couple of quarts of diesel or kerosene and use that as a drive around flush fluid in between Putting all fluid out and new fluid in. Helps to clean up the gears quite a bit.

[Racinbob 11,230]

1) Put 1 1/2 quarts in it. Lifting the front aids in draining but does nothing when filling. I little extra won't be a problem but isn't needed. 

 

2) Yes, use the 90 wt (or so) I use 80w90. For a while they suggested 40 wt motor oil. That was only to help prevent the shift rails from 'suctioning' and causing the transmission to lock up in two gears. The rails were redesigned in the early 60's but the 40 wt blurb remained in the owners manual a while. 

 

30 The shifter boot will stay in place by itself. Make sure it's slipped over the dogpoint setscrew and nut.

 

 

[Racinbob 11,230]

You beat me to it Eric 

[71_Bronco 1,072]

Thanks so much guys! I saw the 2 plugs in the manual, but haven't actually climbed under it yet to find them.

 

I'll update when I drain and see if anything is needed.

 

Thanks!

[71_Bronco 1,072]

Picked up a gallon of 80w-90 yesterday, along with a new drain pan and small funnel to help fill the transmission. Not sure I will be able to work on it during the week, but I'll for sure do it this weekend (along with some other items I want to get done).

[pfrederi 17,881]

On 5/13/2019 at 7:16 AM, 71_Bronco said:

Thanks so much guys! I saw the 2 plugs in the manual, but haven't actually climbed under it yet to find them.

 

I'll update when I drain and see if anything is needed.

 

Thanks!

Drain plug 1/4" allen wrench needed