What all does the latest dealer reflash change on the CRD?
My trans shifts to 5th and locks at 60 mph, under load it will drop down to 50 and lug unless you floor it to down shift, will the f37 flash help?
Will the GDE tune work with the f37 flash?

Have you tried using the OD lock out button on the LH side of the shifter in those instances below 55 mph ?

Most people don't want the F37 because it changes the engine torque and hp too (lowers it in both cases).

Maybe this will help
http://www.greendieselengineering.com/f ... st/20.page

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Dennis
Considering sound advice, invent your own solutions
CRD