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Old 07-20-2010, 12:59 PM   #41
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How is everyone feeling about the fluid they have been running. I just got my 2nd 6 speed and need to make a decision. I've been happy with the motorcraft stuff. My current 6 speed shifts super smooth. It's a shame it won't stay in gear while driving.

Anyone switching it up because they didn't like what they were running?

Hows the amsoil MTG vs the MTF with friction modifiers?
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Old 07-20-2010, 01:27 PM   #42
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I just put fresh RL75w90 in mine and it feels superb. No grinding/notchy shifts. It had RL in it before, but it feels even better now. There was very minimal specs of metallic dust on the drain plug and no multi-colored fluid when I drained the old stuff out too.

On a side note, when I drained out the old RL fluid, it smelled like new plastic/rubber...like a new Rubbermaid container lol The new fluid smells like ****.
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Old 07-20-2010, 01:28 PM   #43
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I wish the fluid was easy enough to change that I could run 2 different viscosities, depending on the season. Thinner stuff for winter, thicker stuff for summer.
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Old 07-20-2010, 01:29 PM   #44
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Quote:
Originally Posted by Bryce View Post
I wish the fluid was easy enough to change that I could run 2 different viscosities, depending on the season. Thinner stuff for winter, thicker stuff for summer.
Um... it isn't hard to change.

So far I'm happy with my GM Syncromesh with friction modifier.
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Old 07-20-2010, 01:30 PM   #45
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Originally Posted by Bryce View Post
I wish the fluid was easy enough to change that I could run 2 different viscosities, depending on the season. Thinner stuff for winter, thicker stuff for summer.
It should be stupid easy because all you have to do is drain it...you can refill it from the shifter turrett rather than getting a pump and hose back up to the fill hole.
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Old 07-20-2010, 01:31 PM   #46
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Lemme rephrase that. I wish the fluid was cheap enough that I could change it every season, thicker stuff for summer, and thinner stuff for winter.
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Old 07-20-2010, 01:33 PM   #47
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Lemme rephrase that. I wish the fluid was cheap enough that I could change it every season, thicker stuff for summer, and thinner stuff for winter.
Ok, now that I can live with.
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Old 07-20-2010, 01:42 PM   #48
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Originally Posted by Doppelgänger View Post
I just put fresh RL75w90 in mine and it feels superb. No grinding/notchy shifts. It had RL in it before, but it feels even better now. There was very minimal specs of metallic dust on the drain plug and no multi-colored fluid when I drained the old stuff out too.

On a side note, when I drained out the old RL fluid, it smelled like new plastic/rubber...like a new Rubbermaid container lol The new fluid smells like ****.
I swapped from Redline MT90 and RL75w90 NS in two different 6 speed cars to Amzoil MTG 75W90 GL4 in both cases the shifting feel was greatly improved with the Amsoil product.

In the 5 speed I liked Royal Purple 75W90. Less friction and less transmission heat was apparent. The syncros in the 5 speed aren’t near as sensitive however and it shifted great. Shifting wasn’t very good when I tried this in a 6 speed.

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Old 07-20-2010, 01:42 PM   #49
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Originally Posted by Bryce View Post
Lemme rephrase that. I wish the fluid was cheap enough that I could change it every season, thicker stuff for summer, and thinner stuff for winter.
In the spectrum of maintainence, it's really not that expensive. IIRC I payed $28 for two quarts of the RL. That's the same price I pay for an oil change of Rotella Syn and a Mazda filter. So it's like 2 extra oil changes per year :lmao:
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Old 07-20-2010, 02:42 PM   #50
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I run Amsoil MTG.
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Old 07-20-2010, 03:43 PM   #51
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I run Amsoil MTG.
Have you run the motorcraft stuff before, I can't remember? Why are you running the MTG? I'm asking the vague question since you probably have one of the hardest run cars on the forum. Your analysis will be accepted by a lot of people.

Also, where the hell is everyone buying their amsoil products? EDIT: I found a place that sells it. $12.99 Qt This is $10 cheaper for me than the Motorcraft stuff /qt
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Old 07-20-2010, 08:17 PM   #52
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I'm going to try 1 quart shockproof with 1 quart motorcraft and see how it shifts.
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Old 07-20-2010, 08:57 PM   #53
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I have never tried the Motorcraft. I run the MTG because the tranny shifts nice with MTG in it.
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Old 07-20-2010, 09:17 PM   #54
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I have never tried the Motorcraft. I run the MTG because the tranny shifts nice with MTG in it.
Good enough for me, and it's half as much as the motorcraft.
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Old 07-20-2010, 11:04 PM   #55
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I have been using the $14/4oz GM Synchromesh additive, I left that out of the new tranny. I'll add it in in a couple of events to see if I can tell $14 worth of difference.
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Old 07-20-2010, 11:35 PM   #56
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Quote:
Originally Posted by djp0623 View Post
Also, where the hell is everyone buying their amsoil products? EDIT: I found a place that sells it. $12.99 Qt This is $10 cheaper for me than the Motorcraft stuff /qt
Email [email protected] about it and mention you are from miataturbo.net. He is a member on here and an authorized dealer but I forget his forum name. He sells it for cost plus shipping. For me it would cost $40 shipped for 3 quarts.

Locally I have been able to find it at a few stores for around 16$ a bottle.
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Old 07-20-2010, 11:36 PM   #57
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MTG here. I went to it from the RP GL-5 (a mistake), the MTG is absolutely awesome, even cold. Do it.
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Old 07-21-2010, 12:57 AM   #58
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Quote:
Originally Posted by Savington View Post
I have been using the $14/4oz GM Synchromesh additive, I left that out of the new tranny. I'll add it in in a couple of events to see if I can tell $14 worth of difference.
Please post back when you decide which you prefer with/without synchromesh.

Any reason why adding synchromesh would be a bad thing?

Maybe this is why the MTG works so well. It sounds like they have there own synchromesh additives built in:

"Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 API GL-4

New AMSOIL Synthetic Manual Transmission and Transaxle Gear Lube (MTG) meets and exceeds the gear, bearing, synchromesh and seal demands found in automobiles and light trucks.

AMSOIL Synthetic Manual Transmission and Transaxle Gear Lube (MTG) is designed to meet the special requirements of certain manual transmissions and transaxles, such as the New Venture NV4500. It is designed to replace AMSOIL 80W-90 Synthetic Gear Lube (AGT) and provide improved internal component protection. These transmissions are cast iron and have exhaust pipes close to them, causing them to run hot. Increased operating temperatures can harden seals and cause oil leaks. In addition to lubricating gears, bearings and synchromesh systems, transmission oil must keep seals soft even when temperatures increase. The premium synthetic formulation of AMSOIL Synthetic Manual Transmission and Transaxle Gear Lube is designed to specifically address the needs of these hot running transmissions.

MTG is formulated with extreme pressure (EP) additives and advanced synchromesh qualities that provide smooth shifts while protecting gears, bearings and seals. It is not corrosive to yellow metals, such as copper, that are used in some synchromesh systems. MTG provides the maximum transmission and transaxle internal component protection.

Applications
MTG is recommended for synchronized manual transmissions and transaxles that require 75W-85, 75W-90 or 80W-90 API GL-4 gear lube. Recommended for use in NV 4500 transmissions and replaces GM part # 12346190 and Chrysler part # 4874459 (Chrysler specification MS-9070). MTG meets GL-4 performance specifications required by some models of Acura, Hyundai, Infiniti, Kia, Land Rover, Lexus, Mazda, Mitsubishi-Fuso and Zetor. Ideal for muscle car transmissions, including Muncie, Borg Warner, Saginaw, Ford Toploader, Dearborn and New Process."

Last edited by miatauser884; 07-21-2010 at 01:14 AM.
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Old 07-21-2010, 01:20 AM   #59
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I've used amsoil MTG on both my old 5speed and new MSM 6 speed and have no complaints. It's not incredibly expensive (especially if you know someone with a dealer license) and feels much better than the redline stuff I was using previously. I'll have to look into the additives, never thought about using anything other than straight 75w-90.
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Old 07-21-2010, 02:35 AM   #60
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Quote:
Originally Posted by saedrin View Post
I've used amsoil MTG on both my old 5speed and new MSM 6 speed and have no complaints. It's not incredibly expensive (especially if you know someone with a dealer license) and feels much better than the redline stuff I was using previously. I'll have to look into the additives, never thought about using anything other than straight 75w-90.
I think the Amsoil MTG already has the same stuff as the GM friction modifier already in it.

Like I said it was noticeably better than anything else I tried. I tried it first just because I needed some fluid in a hurry and the local Napa store had it. I was doing some maintenance on a friend’s car and when she got it back she said “What did you do to the shifter it shifts so much better.”

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