Best Transmission Fluid

[Paul M3]

OE....

[Cbouts]

Not trying to fan flames here, BUT... reviews or thoughts on RP Synchromax?

[Obioban]

OE BMW MTF LT2 or Pentosin MTF2 if you can find any new old stock.

[Onefastsicilian]

OE fluid...

[Phoenix///M3]

Go for the Pentosin that Feffman has posted above. I just switched from Redline MTF to Pentosin and it shifts like butter. Never liked the Redline.

[Feffman]

What do you guys use for a transmission flush before you change the fluid?

You don't really flush a manual transmission. It's simply a thorough drain (I let it drip overnight) and then refill with the proper fluid.

[s54wagon]

What do you guys use for a transmission flush before you change the fluid?

[beefaroni]

I did not like D4ATF in the gearbox. Felt like it grinded more frequently, and after 10k miles shifting feel dropped off. I changed for fresh D4ATF at 10k and it wasn't much better. Went back to OEM Pentosin and it feels good again.

Im about to switch from D4 ATF to Pentosin MTF-2. It really takes a lot of temperature in the gearbox before things arent crunchy and im hoping that goes away/improves. I will report back.

[Will]

I did not like D4ATF in the gearbox. Felt like it grinded more frequently, and after 10k miles shifting feel dropped off. I changed for fresh D4ATF at 10k and it wasn't much better. Went back to OEM Pentosin and it feels good again.

[Ceelooboob]

I primarily drive my M3 on the street and the OEM fluid has been great. No complaints.

[Tbonem3]

75w80 gl4 1.8l
Oe bmw
pentosin
ravenol
or some single weight from motul, amsoil et al

[M3mike]

My e46 m3 is probably 95% street. Refreshing the transmission fluid. What should I go with oem or redline d4/MTL or mixture of the two redlines?