best oil for S&S 6 speed?

[kennyflhr]

About to take a trip & going to change fluids.I've got a S&S 6speed & was wondering which gear oil & what weight. alot of guys around here run Lucus oil additive 50/50 with their gear oil.It gets pretty hot here in Arkansas.I'm sold on it in the motor but still not sure about the gear box.

[TheNowhereman]

Originally Posted by kennyflhr

About to take a trip & going to change fluids.I've got a S&S 6speed & was wondering which gear oil & what weight. alot of guys around here run Lucus oil additive 50/50 with their gear oil.It gets pretty hot here in Arkansas.I'm sold on it in the motor but still not sure about the gear box.

Gear are smaller so load per gear is higher.
You want an oil with good shock strength.
That means a Redline syn or an AMSOIL, something like that.
I use redline syn atf in my primary and AMSOIL 75 / 90 tranny oil and ride hard. temp is not an issue.
I use an Ultima 6 speed w/ their 127 an have no issues.
I ran the 75/90 in my factory 5 speed with no problems for ten years.

[dynarule]

I have the Lucas 85w140 (dino) in my six speed and it has served me well.

[SFTL-1]

I have used various motor-gear oils in my transmission and so far my favorite is Amsoil's 75W-110 and I am not an Amsoil groupie, I just call it the way I see it...

[mstngjoe]

What does S&S recommend?

I know Baker ships Spectro with their boxes, which is what I use in my 6 speed.

[sportking]

Spectro this year ! Red Line last year !
Whats it all mean ?
I do like the Red Line and have seen improvments even in use with stock 5 speed unit's. Ill go as far as saying you cant go wrong with either of the big 3 choices
But i do like using different colors in different holes >

[HDSG]

Originally Posted by SFTL-1

I have used various motor-gear oils in my transmission and so far my favorite is Amsoil's 75W-110 and I am not an Amsoil groupie, I just call it the way I see it...

You are going to be sorry you ever said that..................