94 E150, axle code 19 (standard, Ford, no limited slip). Don't have the owner's manual.

The Chiltons guide I just picked up says 94-up, "use a premium rear axle lubricant".Profanity Removed?? It lists 75w hypoid gear lube for earlier models.

 

It should take 80W-90 gear oil. Should be able to use any brand. Hope this helps.

Bill

 

The owners manual says 80-90


Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds .

Check out my Gallery for a look-see.


Justin - One Happy FTE Member

 

I posted this somewhere, but forget which FTE section it was in, so... let me just say that I think you'll find that a switch to a full synthetic (Mobil 1 Gear Oil (or is it Mobil 1 75w-90?)) is worth the extra money.

I don't beat or race my truck, so I didn't notice anything until I took it on the 65 MPH highways. It accelerated easier and faster. Not a ton, mind you, but if you've got a stick and you're in-tune with the way your truck handles hills & such, I think you'll notice the difference.

My other recomendation is to have one of those mechanic's magnets on the end of a telescoping rod, and to spend some time getting in to all the nooks and crannies to pull out metalic particles. I had a good amount in there.

And don't forget to clean the filler-plug's magnet.

Best,

 

Mine said 80-90 aswell.

I put GL-5 80-135 last summer.

 

Just be careful, synthetic will probably leak from the seals.


Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds .

Check out my Gallery for a look-see.


Justin - One Happy FTE Member

 

Hey, if someone has seal leakage then they have seal leakage. It's not going to leak because of synthetic, but if you've got leaks - it will leak faster.

I know my 1993 was tight, and it reamins so (as has everything I put syntethic in over the years). The only leaking part was the cover's gasket, but of course that gets changed when one changes the differential fluid.

MustangGT221 , you proabably ought to change out your seals if that's a problem for ya.

Best,

 

Mine don't leak, but I've heard that if you use synthetic it has more of a tendency to leak on old seals, just letting the guy be aware, no big deal.


Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds .

Check out my Gallery for a look-see.


Justin - One Happy FTE Member

 

Went with the regular GL5 stuff. Actually I was about to buy everything at PepBoys, but I asked and they did the job for $34, so why buy $10 worth of gear oil and a gasket?

They used a suction pump, sucked out the old stuff, filled it up with the new stuff.

I was hoping it would quiet down the rear end some, but it still makes the same noise. Probably nothing will fix 193,000 miles worth of wear except new gears/bearings and so forth. Noth worth it in this case, as long as it doesn't blow up on the highway somewhere.