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Old 05-24-2003, 04:02 AM
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Question 1989 420 SEL no power going up grade

I recently replaced the tranny in my Benz and all of a sudden I don't have a any power when the car is going up grade. Its fine on flat ground, but when I depress the accelerator, going uphill it seems to have no power at all. I've already had a tune up done to the car. Any suggestions.
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Old 05-24-2003, 04:39 PM
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Join Date: Nov 2000
Location: Long Island, New York
Posts: 79
Who did the work on the tranny? Was it a DIY?
2004 E320 Wagon
1989 300SE
1998 Range Rover 4.0 SE
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Old 05-25-2003, 12:50 AM
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The tranny was done by an auto repair shop. It drives great on level ground but when the car starts to climb there is definitly a problem with acceleration. It loses all power. The RPM shows no movement. Appreciate all the help I can get. Thank you
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Old 06-01-2003, 03:49 PM
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Question loses power on highway speed

the fuel pump has also been replaced as well as the gas regulator. What could be next? Car loses power at highway speeds and then picks up. The car in question is the 1989 420 SEL.
Thanks for your help.
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Old 06-01-2003, 04:25 PM
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You can do it
Join Date: Jun 2003
Location: OC S. California
Posts: 120
Try adjusting the Modulator, even though it is for hard or soft shifting of Tranny but I found it to be effecting the pick up of the car. I would assume your car was running Ok before the Tranny chnage, so may be new tranny need adjustment.
Is it a new tranny or rebuild or used?
Did you trid changing the Fuel filter?

I hope it help. Keep us posted.
87 420 SEL
Looking for a nice mid 80's MB diesel.
87 BMW 528e (Sold)
99 TOYOTA 4Runner
1989 Honda Accord (Sold)
1988 Honda Accord (Total)
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