I believe some of the G900's had a 3 speed amplitorque. Its also important to know that low range can slip or not work at all in these tractors or (any MM) with an amplitorque. Low range is when the lever is pulled back (toward the driver). Also note that the tractor will "free wheel" in low range. We have 3 G900's diesels along with about 30 other MM's. Feel free to email me with any questions.