Rear End and Transfer Case Oil

[Galaxie]

I have about 41,000 miles on my truck. Mainly used for daily driving, towing every now and then lightly (old ford cars), and some street fun.

Would you recomend changing the transfer and gear fluids in this?

Also, what would you run?

Thoughts.

[smokersteve]

have you changed it before?

Amsoil. Not because I have it, but because I like its improved effects. I changed the fluid at 30,000 miles.

If you do use amsoil, one thing that you will notice right off the bat is the decrease in 4X4 noise.

[cbrown05]

I've heard Red Line is good stuff.

[RZR007]

Royal Purple is good as well.

[SickStroke6.0]

The fluid in my rear end or transfer case has never been changed.

I know I can do the transfer case, but what about the rear end? And how often am I supposed to change the rear end fluid?

[Galaxie]

I havent changed it yet. All Ford stuff in there. I have used the amsoil at a past job, liked it a lot. What weight goes in these things?

[Jayson41]

amsoil.com will give you the weights you need i want to say it was 75 - 140 but look it up for sure. I went with Amsoil in my rear diff, front diff and transfer case. make sure you get some black rtv seems there is no gasket in the front or rear diff. Also you will need a hose or pump for the refill

[RZR007]

At 50k I put RP 75w140 in the rear. If I had a transfer case, I would use RP Synchromax or Amsoil.

[Galaxie]

Originally Posted by Jayson41

amsoil.com will give you the weights you need i want to say it was 75 - 140 but look it up for sure. I went with Amsoil in my rear diff, front diff and transfer case. make sure you get some black rtv seems there is no gasket in the front or rear diff. Also you will need a hose or pump for the refill

I made a handy little contraption for that! Before I put a 5 speed TKO in my 64 Galaxie, it was a factory 4 speed top loader. I swear they gave about 1" of room to work with. lol.

[Galaxie]

Also, thanks! I will check out their site.