ajones115236 Posted 5 hours ago Share Posted 5 hours ago Hi I got a Mack GU713 with a Mack 13 speed in it and the driver says when he preselects high range while in 4th gear the trans shifts into high range. I verified this and found it only does it when it is in 4th gear. First, second, and third it waits till it passes through neutral to shift to high range. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/75727-trans-goes-into-high-range-while-in-4th-gear/ Share on other sites More sharing options...
Joey Mack Posted 3 hours ago Share Posted 3 hours ago Sounds like a worn detent for the shuttle. You say 4th. But over to the right and down is 5th. Before i go too big, what recent work was done to the trans, shift cover for example ? Quote Link to comment https://www.bigmacktrucks.com/topic/75727-trans-goes-into-high-range-while-in-4th-gear/#findComment-578291 Share on other sites More sharing options...
ajones115236 Posted 2 hours ago Author Share Posted 2 hours ago On a Mack 13 speed 5th is on the high side. No work has been done to this unit in a long time. Quote Link to comment https://www.bigmacktrucks.com/topic/75727-trans-goes-into-high-range-while-in-4th-gear/#findComment-578297 Share on other sites More sharing options...
Joey Mack Posted 1 hour ago Share Posted 1 hour ago Can you post a picture of the shift pattern decal? I have rebuilt enough 2130/2180 tranny's to know a bit, But i am curious... Quote Link to comment https://www.bigmacktrucks.com/topic/75727-trans-goes-into-high-range-while-in-4th-gear/#findComment-578301 Share on other sites More sharing options...
Joey Mack Posted 1 hour ago Share Posted 1 hour ago I want to see what a T-313 looks like.. Quote Link to comment https://www.bigmacktrucks.com/topic/75727-trans-goes-into-high-range-while-in-4th-gear/#findComment-578302 Share on other sites More sharing options...
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