Transmission Fluid?

[rogerzr1]

While I have my car in the air, I thought it might be good to change the transmission fluid. What fluid should I use?

I already did an oil change.
Replaced the left O2 sensor.(still working on the right)
Cleaned in the wheel wells.

What else do you all recomend?

What typ of coolant does everyone use? I don't want to get the wrong stuff.

It seems all I do is ask questions.

[bldavis11]

Standard recs are Castrol TWS 10W60 for the tranny fluid. Purchase 3L from your local BWM dealership. You'll use 2.2 or so. Loosen the fill plug before the drain plug. It requires a 17mm Hex.

I would also change the differential fluid if it hasn't been done recently.

Get the regular green stuff for the coolent. No DexCool.

[rogerzr1]

Originally Posted by bldavis11

Standard recs are Castrol TWS 10W60 for the tranny fluid. Purchase 3L from your local BWM dealership. You'll use 2.2 or so. Loosen the fill plug before the drain plug. It requires a 17mm Hex.

I would also change the differential fluid if it hasn't been done recently.

Get the regular green stuff for the coolent. No DexCool.

Is there a specific fluid for the differential? Is there anywhere else I can get the tws 10w60 besides a BMW dealer?

[bradslt5]

roger, on the engine coolant ,PLEASE make sure it has gm 1825 on the label . using the wrong stuff will blow head gaskets. Napa has the correct stuff . on the rear end I use royal purple 75-90 and add 4 oz of limited slip . hope this helps

[rogerzr1]

Originally Posted by bradslt5

roger, on the engine coolant ,PLEASE make sure it has gm 1825 on the label . using the wrong stuff will blow head gaskets. Napa has the correct stuff . on the rear end I use royal purple 75-90 and add 4 oz of limited slip . hope this helps

I am looking in the manual, but can't find how much of the royal purple I will need for the rear?

[bldavis11]

You don't HAVE to have RP. A bunch of folks, I dare say most, run Mobil1 that you can pick up from the local parts store. It's the standard weight gear lube 75/90. You'll need 2 containers and will use most of two with some slop left over. Be certain to pick up 2 bottles of differential additive from the GM dealer. I don't have the part number though. They'll know what it is.

The rear fill plug is a 10mm hex BTW.

[32valvZ]

why 2 bottles of lmtd slip addative?

[bldavis11]

Other than being spec'd by Gordon to do so, I'm not certain. I think it's an anti-slip rather than a limited slip deal. There are a number of gear lube that have anti-slip additives already in them. Maybe these were not available when the vehicles were manufactured?

It's a friction modifier. Typically I will only add two bottles on a 4:10 equipped car.

[bradslt5]

just curious , why 2 bottles in the410s. to make sure the clutches lock up?