Can anyone tell me how to refill the gear box oil on a 991.1 cup? Manual says that it is 3 liters after a rebuild, but how much for a change? Or do you just fill up to top of fill hole?
Thanks in advance.

 

Buy a dip stick from Bill Rader Motorsports

 

If you go until it overflows, you will be overfilling it. If you're in a pinch, use a piece of wire or coat hanger to measure the height of the fluid before you drain it.

 

 

This:

 

Hi
I have just drained the gear box oil ( 991.1 Cup Car ) 2.5 liters can out , i was going refill with 2.5 liters.
Is this the correct procedure ?
Cheers !

 

3 liters

 

3 Liters... And use a knocked out 10mm Hex socket attached to a 10mm torque extender with an extension to torque the fill plug. Drop the hex into the plug, attach the torque extender and extension and easy day to torque it down, Remember, 90 degrees for the torque extender to maintain same torque value.

 

Rader said the correct amount is 75MM down from the top of the fill hole, easy to measure with a stick. Its about 3.5 Liters.

 

Thank you for your reply !
I noticed on the Cosworth dash , it does not show Gear box temperature.
Does the Bosch system send an alarm ( high gear box temp ) to the dash ?

Cheers