Need to know Engine RPM for 722.5 Trans. at Hig way speed please? - PeachParts Mercedes-Benz Forum

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Need to know Engine RPM for 722.5 Trans. at Hig way speed please?

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10-20-2009, 01:53 PM

fiat

fiat is offline

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Join Date: May 2007

Location: Canoga Park CA.

Posts: 55

Need to know Engine RPM for 722.5 Trans. at Hig way speed please?

Hi Guys, I want to swap in a 722.5 5 speed trans for my 91 300se. I need an extra overdrive gear to boot up the gas mileages and lower the RPM. Please can any one of you tell me what is the RPM you guys at about 75mph for a 722.5 trans with overdrive on. Right now I have a 722.351 4 speed in it at 75mph it read about 3650RPM or more, incredible high!
Hope you guys share some data for me to compare the beneficial between two trans. Thanks
(BTW, FYI, my trans NOT SLIP, run good just paid $1500 for rebuilt.)

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