DieselDog5.9 Posted June 10, 2022 Share Posted June 10, 2022 (edited) So we pulled a 6 speed out and put a 12 speed in 3-4 years ago. The hired driver, (nice guy, just young and inexperienced) had to drive the old R model while the Granite was out of commission for a few days........ Well now 4th gear is noisy in high or low, so thoughts? I think there are 2 versions of this 12 speed, one for off highway trucks a little lower geared and a highway version, we have the highway version. Edited June 10, 2022 by DieselDog5.9 spelling error Quote Link to comment Share on other sites More sharing options...
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