[E30_fan]

I am preparing to change the fluid in the ZF8, transfer case and diffs. Diffs & transfer case is straight forward, but I'd be grateful if someone could proof read my notes/planned procedure for the gearbox.

I'll be filling the gearbox with a helper from the engine bay with a funnel & long piece of hose.

Car jacked up, level, with 4 wheels off the ground.

Undo fill plug, remove drain plug, leave to drain & remove pan, leave to drip a little while longer.

Reinstall new filter/pan, 4nm + 45 deg torque, moving in a star pattern from corner to corner around the pan.

Fill until dripping out of fill plug with engine off.

Start engine, wait until fluid is 40-50c, shift from D to R & back, with foot on the brake. Shift through all gears (1-8) at 2000 rpm to fill TC.

With the engine still running, top-up the gearbox.

Thanks in advance

[charlie fairmont]

I'm sure someone has a bmw-specific process but this is something I grabbed off the net.

[F32Fleet]

Originally Posted by E30_fan

I am preparing to change the fluid in the ZF8, transfer case and diffs. Diffs & transfer case is straight forward, but I'd be grateful if someone could proof read my notes/planned procedure for the gearbox.

I'll be filling the gearbox with a helper from the engine bay with a funnel & long piece of hose.

Car jacked up, level, with 4 wheels off the ground.

Undo fill plug, remove drain plug, leave to drain & remove pan, leave to drip a little while longer.

Reinstall new filter/pan, 4nm + 45 deg torque, moving in a star pattern from corner to corner around the pan.

Fill until dripping out of fill plug with engine off.

Start engine, wait until fluid is 40-50c, shift from D to R & back, with foot on the brake. Shift through all gears (1-8) at 2000 rpm to fill TC.

With the engine still running, top-up the gearbox.

Thanks in advance

Attached is the official procedure from ZF. Per ZF there's no torque angle on the plastic pan bolts and it's 10nm.

https://aftermarket.zf.com/app/contr...505690da53.pdf

[Grateful_Newt]

You've got the procedure correct. Do it exactly as you have noted, and you're in business. I did mine in September, and it's not a bad job. I am NOT a mechanic.

[AspektUSA]

Meyle has a great video on it: