BMW MTF LT-2 Transmission Fluid to Pentosin FFL-4 Transmission Fluid

[Silbergrau metallic]

For those who've changed their 6 Speed E46 M3 Transmission fluid. Did you completely flush the entire Transmission, including lines, pump, and cooler. I'm curious, because I'm about to do this and I'm wondering if going from BMW MTF LT-2 Transmission Fluid to Pentosin FFL-4 Transmission Fluid is it ok if the two of those Fluids mix or should should everything be flushed. Was just thinking that quite a bit of the existing oil would be in those components and wanted to make sure they're similar enough that any mixing won't be an issue.

[M3GA]

For those who've changed their 6 Speed E46 M3 Transmission fluid. Did you completely flush the entire Transmission, including lines, pump, and cooler. I'm curious, because I'm about to do this and I'm wondering if going from BMW MTF LT-2 Transmission Fluid to Pentosin FFL-4 Transmission Fluid is it ok if the two of those Fluids mix or should should everything be flushed. Was just thinking that quite a bit of the existing oil would be in those components and wanted to make sure they're similar enough that any mixing won't be an issue.

Unnecessary, the fluids are fully compatible and nearly identical. I just did a normal drain and fill, many miles ago.

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[Shonky]

There's no manual trans cooler, pump or lines.

[Silbergrau metallic]

There's no manual trans cooler, pump or lines.

Just realized that, but thank you for letting me know. I guess it really doesn't matter if I go to switch to Pentosin FFL-4 Transmission Fluid

Today, 01:27 PM

[Tbonem3]

I flushed OE MTF-lt-2 (60k) and put in the FFL4 into a friends gearbox, and all seems well. I've been a GL4 75w80 only holdout, but even I may need to give in soon.

[repoman89]

Unnecessary, the fluids are fully compatible and nearly identical. I just did a normal drain and fill, many miles ago.

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Guess perhaps there is no need for me to have like three gallons of MTF2 in my basement

[Tbonem3]

Mándamelas

[M3GA]

Guess perhaps there is no need for me to have like three gallons of MTF2 in my basement

Sell it by the quart to nonconverters 🤣

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[Obioban]

Guess perhaps there is no need for me to have like three gallons of MTF2 in my basement

I resemble that remark

[SteelGreyM]

I resemble that remark

LOL... remember that one guy on ebay who had like 20 gallons... I bought some for me and my buddies. still have a gallon left

[Tbonem3]

Alright, I broke down and bought the FFL4 from FCPeuro for lifetime replacement, and it was on sale for $25/L.

Just discovered that the MTF3 (75w gl4) I'd been using (in steelgrey car) is mineral oil, not full synth. But it was good to clean out the tranny after 123k miles of OE fill anyway, so now I'll try the FFL4.

[Obioban]

LOL... remember that one guy on ebay who had like 20 gallons... I bought some for me and my buddies. still have a gallon left

I have 3 cars that spec the fluid (had 4 when I bought it), so... it'll get used

[Feffman]

MOTUL now has a full synthetic, GL-4 gearbox oil Gear Power 75W-80.

https://new.motul.com/en-US/products/34781?product=MOTUL+GEAR+POWER+75W-80

Feff

[Tbonem3]

awesome! and only about $200!

[simon_c]

Maybe a dumb question but for the Pentosin FFL-4 transmission fluid, is there a difference between the DCT vs. manual versions? I mostly see the DCT version and even FCP has the picture of the DCT version in their "manual" listing: https://www.fcpeuro.com/products/bmw...-23117527440kt