Manual transmission gear oil

[thedat]

Curious what brand of gl4 gear oil 720 owners recommend 

[]2eDeYe]

I use Sta-lube, it is the easiest to find. 

[ViciousV15]

42 minutes ago, ]2eDeYe said:

I use Sta-lube, it is the easiest to find. 

I wasn't able to find it when I was doing the change on my truck so I ended up using a valvoline 80w-90 hybrid that seems to be holding up okay. 

[IZRL]

I second sta-lube 85-90. Cheapest non full synthetic I could find. I had a bad/expensive oil seal leak come up immediately after an engine oil change on a 90s car. Will never use full synthetic anything on older vehicles again.

Edited March 16 by IZRL

[Thomas Perkins]

I use Redline MT-90.

 

[]2eDeYe]

1 hour ago, ViciousV15 said:

I wasn't able to find it when I was doing the change on my truck so I ended up using a valvoline 80w-90 hybrid that seems to be holding up okay. 

 

 

Finding any local is a pain. I order from amazon and keep a couple jugs in stock.

[datzenmike]

I find the synthetic shifts smoother when cold. With the same effort used with regular gear oil, the synthetic shifts faster. Where down shifting was an effort and often caused a small gear clash, the synthetic was without a problem.

 

I think all base synthetic transmission oil is made by the same manufacturer and different color and additive packages are added by different brands.

[Thomas Perkins]

When was the last time you changed your rear end oil.I had to replace my seal not long ago.Nissan still sells them.I bought a extra one.

[Stinky]

I just tried Syncromesh, it is more like 10-30.  Honda, and some others specify it.  It is for newer trans.

[datzenmike]

But works really well in old Datsun transmissions.