The Great Oil Debate

[atistang]

The tough balance is always: Gear size v. synchro size v. trans size/weight v. cost. You need big gears to hold this much power and that means smaller, harder-working synchros if you keep case size and weight the same or in mind. Plus, there's fact that everyone wants synchros on every gear now, which is ridiculous, in my view. I'd happily line up the gear once to get reverse or first if it meant more substantial synchro rings on 2-6.

synchros on reverse is just retarded

 

[UnleashedBeast]

synchros on reverse is just retarded

A '99 Trans Am I had malfunctioned (Tremec T56). I had to put it in 1st gear before putting it into reverse to avoid grinding.

 

[atistang]

A '99 Trans Am I had malfunctioned (Tremec T56). I had to put it in 1st gear before putting it into reverse to avoid grinding.

I do that anyway, typical non syncro reverse. Less shit to go wrong

 

[GrabberBooGT]

I have noticed the more I drive with the MTG, the shifting is smoothing out more and more. Almost as smooth as the MTL I use to have in my tranny.

Wouldn't this imply that that the MTG is thinning out (or breaking down) slightly to a viscosity that the tranny likes more? To me, that says the thinner MTL might work better.

Still trying to decide which fluid to change to come spring . . .

 

[UnleashedBeast]

Wouldn't this imply that that the MTG is thinning out (or breaking down) slightly to a viscosity that the tranny likes more? To me, that says the thinner MTL might work better.

Still trying to decide which fluid to change to come spring . . .

I doubt that. MTG is very shear resistant/stable. It means the additives are working their way into the metal better. "Conditioning"

 

[thezfunk]

I am tempted to try Amsoil's Syncromesh oil. Anyone try that before?

 

[UnleashedBeast]

I am tempted to try Amsoil's Syncromesh oil. Anyone try that before?

There are people that have had excellent success/results with cheaper synchromesh lubricant in their MT-82. In another thread, some have been loving BG style synchromesh.

I've told people you can use either Amsoil MTG or synchromesh. The synchromesh seems to be better at initial cold weather shifting than MTG.

 

[JAJ]

I'm surprised nobody's posted anything about Amsoil MTF. It should work well in the MT-82 as well. It has the added benefit of being somewhat cheaper than BG SS II and it might just work as well as the BG does. Somebody should try it (won't be me, I spent over $400 on gear oil for my series of trials - I got what I needed and I'm done for now).

 

[slvr08gt]

I'm surprised nobody's posted anything about Amsoil MTF. It should work well in the MT-82 as well. It has the added benefit of being somewhat cheaper than BG SS II and it might just work as well as the BG does. Somebody should try it (won't be me, I spent over $400 on gear oil for my series of trials - I got what I needed and I'm done for now).

I'll try it out and report back.

-Nick

 

[slvr08gt]

The site says its 5-30wt. Is that correct? Ive never heard of that weight fluid in a tranny.

-Nick

 

[JAJ]

Oil viscosity scales are different for gear oil and engine oil. I imagine that's so to reduce the risk that someone puts the wrong oil in an engine or a gear box. From a numbers standpoint, 75w-80 gear oil is pretty much the same viscosity as 5w-30 engine oil.

The Amsoil MTF viscosity data qualifies it as 75w-80 on the "Gear oil" scale; it's similar in viscosity to Redline MTL and BG SS II, which are rated as 75w-80.

I realize that this explanation doesn't answer your question of why Amsoil lists it as 5w-30; maybe UnleashedBeast knows.

 

[UnleashedBeast]

I'm surprised nobody's posted anything about Amsoil MTF. It should work well in the MT-82 as well. It has the added benefit of being somewhat cheaper than BG SS II and it might just work as well as the BG does. Somebody should try it (won't be me, I spent over $400 on gear oil for my series of trials - I got what I needed and I'm done for now).

I have suggested it as an acceptable replacement to MTG.

MTF is synchromesh. I've said it's OK to use in the MT-82 more than once. Some in Florida have had good results from it.

 

[slvr08gt]

Oil viscosity scales are different for gear oil and engine oil. I imagine that's so to reduce the risk that someone puts the wrong oil in an engine or a gear box. From a numbers standpoint, 75w-80 gear oil is pretty much the same viscosity as 5w-30 engine oil.

The Amsoil MTF viscosity data qualifies it as 75w-80 on the "Gear oil" scale; it's similar in viscosity to Redline MTL and BG SS II, which are rated as 75w-80.

I realize that this explanation doesn't answer your question of why Amsoil lists it as 5w-30; maybe UnleashedBeast knows.

I have suggested it as an acceptable replacement to MTG.

MTF is synchromesh. I've said it's OK to use in the MT-82 more than once. Some in Florida have had good results from it.

Thanks for the explanation and I will report back tommarow with my results.

-Nick

 

[RI_2011_GT]

Nick,

Did you notice a difference with the change?

 

[NCStangs]

FWIW, I followed Mr. Beast's advice and did the MTG @ 700 miles. Followed that up with an MGW @ about 2500 miles. Asheville, NC weather. 2012 GT, 10/11 build date. MTG did make a positive difference. MGW even better. Never really had any serious issues, just the cold notchiness and general sloppy shifter performance - no worries at all now.

 

[fake]

Weather here has been in the upper 70's mid 80's. The MTG is shifting like the MTL did in the warmer weather. MTG was horrible in cold weather but not as bad as the factory fill.
I'm sure the MTG will continue to smooth out even further when the weather here approaches 100+ degrees.

 

[cgibs89]

Weather here has been in the upper 70's mid 80's. The MTG is shifting like the MTL did in the warmer weather. MTG was horrible in cold weather but not as bad as the factory fill.
I'm sure the MTG will continue to smooth out even further when the weather here approaches 100+ degrees.

+1. I need to double clutch in the morning or else I'll never be able to get it into 2nd unless I man-handle the shifter. Once it's warmed up though, it's a hot knife through butter.

 

[Napoleon85]

+1. I need to double clutch in the morning or else I'll never be able to get it into 2nd unless I man-handle the shifter. Once it's warmed up though, it's a hot knife through butter.

Haha I know that feeling. Yeah bitch! Get in second gear and like it!

 

[cgibs89]

Haha I know that feeling. Yeah bitch! Get in second gear and like it!

Basically. My first words in the morning? "What the fuck? SHIFT GOD DAMNIT"

 

[fake]

I just shift 1st to 3rd until warmed up. Fuck 2nd gear....