General Information, Meritor Range-Shift
Refer to the Meritor website for additional information, www.meritor.com.
9-Speed RM, RMO, and RMX Models
Meritor 9-speed transmissions have a 5-speed front section, and a 2-speed auxiliary section. The low gear in the front sections of the "A" and "B" ratio transmissions is used only as a starting ratio. The high gear in the front section of the "R" ratio transmissions is used only as the top gear. The remaining gear positions of the above transmissions are used once in the low range and once in the high range. See Fig. for the shift patterns.
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All RM and RMX Transmissions
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All RMO Transmissions
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All RMX-R Transmissions
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High Range
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Low Range
Fig. 1, Meritor 9-Speed RM, RMO and RMX Model Transmissions Shift Patterns
Note: The 3rd/7th and 4th/8th shift positions in the RM and RMX (direct ratio) are opposite of the RMO (overdrive ratio) transmissions. The RMX-R ratio transmissions have the 1st/5th shift positions where low is in the A and B ratio transmissions. The top gear in the RMX-R ratio transmissions is called 9th gear.
10-Speed RM and RMX Models
Meritor 10-speed transmissions have ten evenly-spaced forward ratios. Each transmission consists of a 5-speed front section, and a 2-speed auxiliary section. The ten forward speeds are obtained by twice using a 5-speed shift pattern: the first time in low range; the second time in high range. See Fig. for the shift pattern.
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All RM and RMX Transmissions
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All RMO Transmissions
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High Range
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Low Range