Tachoblog’s favourite automatic gearbox is gaining a second reverse gear.  This is what it looks like…

k06 allison 4000r hir

As part of an ongoing product optimisation initiative, Allison Transmission is introducing a 2nd Reverse gear on all Allison 4700 and 4800 models for the 2010 model year.

This new feature offers a second ‘deep reverse’ in addition to the standard reverse to provide greater control and engine braking during operation on steep grades. 2nd Reverse will also enable increased manoeuvrability when operating in confined spaces, allowing quicker operation cycles and thereby boosting productivity performance.

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“Customers in construction and mining in particular, will appreciate the provision of a deeper reverse gear,” Larry Love, Allison Executive Director of International Marketing told Tachoblog.  “The shorter ratios of 2nd Reverse will make up and downhill reversing much safer and easier in heavy duty applications, giving drivers additional confidence. This is another reason to specify an Allison fully automatic transmission, complementing features such as our adaptive Electronic Control Systems and integral retarder that aim to improve comfort and productivity for drivers and operators.”

When a vehicle is in 2nd Reverse, it will have a slow creep capability with high engine speeds. With a mechanical ratio of 17.12, it will have an effective torque converter multiplied ratio up to 32.5:1. The new 2nd Reverse feature provides overall better performance and enhanced applicability for a variety of applications. It will be available mid-year 2010.