Gear oil for trans and rearends

[Rawze]

(12-10-2016 )Johnboy Wrote:  Honestly the not changing the oil is the biggest reason I see rearends go for some reason people seem to think the synthetic oil doesn't need to be changed.
Personally I use the synthetic with half a gallon of lucas in the rearends and 50w in the transmission. I have thought about changing to conventional 80w 90 after an internal cooler cracked in a trans and filled it with antifreeze I drained and filled it with 80w90 to get it home.
That was the best it had ever shifted literally clicked in and out of gear where it had always rumbled a little bit. I was just curious if any of you had tried it thanks for the reply.

The heavier weight oil is good for them as they wear.

I have seen a lot of tricks tried by various people to extend the life of gearboxes over the years. Gearboxes from rear ends, to spindle heads in machinery, to high-precision axis gearboxes, etc... and at the end of the day,.. nothing whatsoever beats higher hydraulic pressure ratings between components. -- Nothing, no matter what type of oil it is as long as it has decent additives in it.-- I.E. -- using a slightly thinker oil.

I have even seen guys use thinner, really expensive, special synthetic, high dollar foreign oils, and treat components with very expensive coatings, and compare them to a cheapo-, half decent thicker oil,.. and still loose.