Is 80w90 okay

I have a 95 xj with manual transmission. I was given 5 gallons of this:

http://www.napaonline.com/MasterPag...umber=75213&Description=Gear+Oil+-+Automotive.

Manual calls for 75w90 but I have this, is it ok to use for transmission and diff's.

75w-90. FSM is supreme.

Specifically GL-3 rated gear oil for the AX-15, not GL-5.
It's sold at Dodge and Jeep dealerships.
Jeep on!
--Pete

Pete M said:

Specifically GL-3 rated gear oil for the AX-15, not GL-5.
It's sold at Dodge and Jeep dealerships.
Jeep on!
--Pete

Click to expand...

Pete I believe this stuff is gl-3?? Am I wrong??

Attributes:
Manufacturer:NAPA / Valvoline
Weight Rating:GL-5
GL-4
GL-3
Size:5 Gal
Application:High Performance
Extreme Pressure Gear Lubricant. Designed for a Wide Range of Applications and is for Use in Manual Transmissions and Both Regular and Limited Slip Differentials.

I don't know for sure. The Napa link isn't working properly for me. Does that bit of info mean that it's GL-3, or GL3/4/5? It's the sulphor content in GL-5 rated oil that can eat away at the yellow metals in the AX-15 (namely the synchros).
Jeep on!
--Pete