Opinion on Tranny and Diff fluids.

[Enemy]

I think MTL and MT-90 are fine for the transmission too, manual anyway.

[kayger12]

I think MTL and MT-90 are fine for the transmission too, manual anyway.

Correct on the MTL. Haven't read anything to confirm the MT-90.

From Mike Miller-- "All the BMW gearbox rebuilders I know use Red Line MTL exclusively, regardless of
model year or gearbox. The general consensus is MTL is the better lubricant.
However, Red Line D4ATF will require less shifter babying during cold operation. I use
Red Line MTL in manual gearboxes except where I can’t trust the driver to shift properly
when the gearbox is cold, in which case I use Red Line D4 ATF."

[LivesNearCostco]

Yes, I read that before and was main reason I chose MTL.

[ELCID86]

Planning to do the tranny and I can't find Redline MTL (75w80) local, but Car Quest has MT-85 (75w85). Any reservations for use in VA during the summer?

http://www.redlineoil.com/product.aspx?pid=45&pcid=7

http://store.bimmerworld.com/red-lin...ants-p192.aspx

MT-85
SAE Viscosity Grade (Gear Oil) 75W85
Vis @ 100°C 12.0
Vis @ 40°C 64.3
Viscosity Index 172
Pour Point, °C -48
Pour Point, °F -54
Brookfield Viscosity @ -40°C,
Poise 160
MTL
SAE Viscosity Grade (Gear Oil) 75W80
Vis @ 100°C, cSt 10.4
Vis @ 40°C, cSt 54.1
Viscosity Index 185
Pour Point, °C -50
Pour Point, °F -58
Brookfield Viscosity @ -40°C,
Poise 120

[Avetiso]

Should be fine. Hardly a difference.

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