I've tried searching the web and GT40's but cannot find this info. Anyone know whats recommended. I did find the OEM capacity is 2.85 quarts but wasn't sure when the transaxle is reoriented. Also would Shell Spirax 75-90 but the best fluid?
Just shy of a Gallon. Mobil Delvac. We ran this for all the 25 hr races. When we would use 1 gallon it would always puke a little into the catch can. If I remember correctly. use a tie wrap and stick down side fill hole on drivers side. 65mm from bottom seems to be the magic volume.