Manual 124 Owners be aware... - Fiat 124 Spider Forum
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post #1 of 14 (permalink) Old 01-03-2018, 04:12 PM Thread Starter
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Manual 124 Owners be aware...

Relax, nothing important

Just a recommendation of transmission fluid

I see a lot of people are using the Amsoil Gear Lube like me too.

I have a better one, which works well with all the Miata transmissions for some reason

and everyone knows we have the NC manual transmission

The fluid is called:

Genuine Ford Fluid XT-M5-QS Full Synthetic Manual Transmission Fluid

and you can buy it here on amazon

https://www.amazon.com/Genuine-Ford-.../dp/B000NUES82

Yup, it is a ford fluid but it works like magic.

Gears go in so much easier than Amsoil and OEM Fluid. especially noticeable in winter on cold startups

Last edited by RBH58; 01-03-2018 at 08:03 PM.
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post #2 of 14 (permalink) Old 01-03-2018, 04:23 PM
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Quote:
Originally Posted by klikai View Post
Relax, nothing important

Just a recommendation of transmission fluid

I see a lot of people are using the Amsoil Gear Lube like me too.

I have a better one, which works well with all the Miata transmissions for some reason

and everyone knows we have the NC manual transmission

The fluid is called:

Genuine Ford Fluid XT-M5-QS Full Synthetic Manual Transmission Fluid

and you can buy it here on amazon

https://www.amazon.com/Genuine-Ford-.../dp/B000NUES82

Yup, it is a ford fluid but it works like magic.

Gears go in so much easier than Amsoil and OEM Fluid. especially noticeable in winter on cold startups
I used it in my old Mazdaspeed Miata and really liked it. Maybe after I'm done trying out the AMSOIL, I'll switch to that and see how it feels.

2017 Fiat 124 Abarth: Grigrio Argento Aluminum, 6MT, Luxury Package, Recaros
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post #3 of 14 (permalink) Old 01-03-2018, 04:38 PM Thread Starter
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Originally Posted by lynk26 View Post
I used it in my old Mazdaspeed Miata and really liked it. Maybe after I'm done trying out the AMSOIL, I'll switch to that and see how it feels.
The Amsoil is an improvement from OEM Fluid, but for some reason, it is harder to get in to reverse.

Ford MTF is much smoother in all gears
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post #4 of 14 (permalink) Old 01-03-2018, 04:40 PM
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After using the AMSOIL fluid all year and just below freezing, your post confuses me a bit. My gear shifts always go in very smoothly. The stiffness the OE fluid had in reverse and downshifting into some gears was either reduced or eliminated. Once warmed, the shifting was perfectly consistent and perfectly smooth into each gear. Full disclosure, I don't drive in winter conditions with this car if I can help it. I have a winter vehicle, so sub-freezing shifting performance was not on my list of priorities.

Ford's XT-M5-QS is significantly thinner in viscosity with a cSt in the low 11.x range (AMSOIL's 75W-90 GL-4 is at 13.9 cSt at 100C by comparison). It's basically a synchromesh fluid like AMSOIL synchromesh, GM synchromesh, and Pennzoil synchromesh, all of would provide similar results. The problem with these fluids in my experience is that while they shift a bit smoother when very cold, they tend to get inconsistent and occasionally notchy when hot as they thin out. I chose the 75W-90 GL-4 to prevent the hot temperature inconsistency I've noticed switching between the two in another vehicle and comparing to the OE fluid in the 124 Spider.

For year-round shifting quality, a synchromesh fluid like Ford's option may be better, but it should be acknowledged that there is always a trade-off on manual transmission fluids. All oils thicken when cooled and thin when heated. The transmission is comfortable operating in a certain viscosity range, and once you get out of that range either by a thicker fluid being run too cold or a thinner fluid being run too hot, it starts to behave inconsistently.

Have you run this fluid hard at the 124 Spider's power levels in summer heat? How cold is it there now?
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post #5 of 14 (permalink) Old 01-03-2018, 04:42 PM
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Quote:
Originally Posted by klikai View Post
The Amsoil is an improvement from OEM Fluid, but for some reason, it is harder to get in to reverse.

Ford MTF is much smoother in all gears
It can be a bit stiff getting into reverse on a cold day, but IMO not as bad as the OE fluid was. That's the price you pay for a higher viscosity MTF. Again, it's a trade-off.

How long do you wait with your foot off the clutch at idle before backing up on a cold morning, and how cold is it there now?
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post #6 of 14 (permalink) Old 01-03-2018, 04:50 PM
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Thanks for the BE AWARE...I saw this title and was worried! Perhaps a moderator can fix the subject title?

Good to know there are other fluids out there. I've been running the AMSOIL for almost a month now...even in Hawaii Wendi is a bit stiff in the first couple of shifts. (no issue with reverse) But once the blue light special goes out, she shifts just fine.

aloha @klikai

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post #7 of 14 (permalink) Old 01-03-2018, 07:26 PM
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Why the BEWARE ?
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post #8 of 14 (permalink) Old 01-03-2018, 07:43 PM
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Why the BEWARE ?
He actually wrote BE AWARE without the space.

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post #9 of 14 (permalink) Old 01-03-2018, 07:46 PM
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Haha, ok , thanks, my bad.
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post #10 of 14 (permalink) Old 01-03-2018, 08:04 PM
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Originally Posted by Dfnsmn34 View Post
Thanks for the BE AWARE...I saw this title and was worried! Perhaps a moderator can fix the subject title?

Good to know there are other fluids out there. I've been running the AMSOIL for almost a month now...even in Hawaii Wendi is a bit stiff in the first couple of shifts. (no issue with reverse) But once the blue light special goes out, she shifts just fine.

aloha @klikai
Fixed

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Current rides: 2016 Abarth 124 Spider Launch Edition & 2017 MX5 RF 2.0 GT Black Roof
Former rides: MY14 Subaru BRZ, MY11 Renaultsport Megane Cup, MY13 Alfa MiTo QV, MY08 Mazda MX5, MY08 Volvo C30 T5 R-Design, MY05 Alfa 147GTA, MY01 Audi TT 225 quattro, MY98 Honda Prelude SH ATTS
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