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Old 07-02-2000, 02:27 PM
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Join Date: Jul 2000
Location: Whispering Pines, NC
Posts: 29
I'm getting ready to rebuild my 3 speed auto tranny. Is there anyway to upgrade to an overdrive unit? I'm tired of driving on the highway at 3,000 RPMs at 70-75!!!! Will a later 4 speed give me better driveability and gas mileage???
Thanks,
Mike
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Old 07-02-2000, 07:44 PM
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Join Date: Mar 2000
Location: Gainesville FL
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Never heard anyone complain about low gear ratio in a 450SL. The normal complaint is that there isn't enough low end pick-up because of the lack of another gear.

The 722.004 tranny is very similar to the 722.1xx series of trannies and could probably be changed with one for four speeds, BUT that wouldn't help because all MB trannies till the 722.5 are 1/1 final drive ratio; no overdrives. The 722.3xx trannies used in 380 and 500SLs are four speeds but all are one to one final drive ratio.

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Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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