Here's Nissan opinion:
* API GL-4
* MIL-L-2105

Such as:
* Chevron Multiservice Gear Lub. 75,80,90,140
* Esso Gear Oil GP 80,90,140
* Mobil Mobilube EP or GX 80-90,90,140
* Shell Spirax 75EP,80EP,90EP,140EP
* Sunoco Multipurpose Gear Lub. GL-4 80,90,140
* Texaco Universal Gear Lub. EP 80,90,140




The modern blend is 85W-140 multiweight, same as the Transmission lube

Just quick query as I hear mixed ideas on what to put in the steering box

The main idea is transmission/diff oil and fill steering box
The other is fill with an MSI Grease for example penrite steeringbox lube (NLGI 00, lithium based grease, blended with effective anti-wear, rust and oxidation inhibitors.)

Now im curious as im putting a new steering box in my other Datsun as the lash was so far gone that the worm and balls had like 2 inches of play was screwed what is the best idea for our Datsun 1200 steering boxes??