My 90 350 sdl will run between 71 and 75 mph at a constant 3000rpm. It isn't a rise and fall but differs from am to pm.
Is there that much slip in th TC or are my guages slacking?
The car runs smoothly and MPG has not changed.

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82 300D....went to MB heaven
90 350 SDL....excercising con rods

speedo. you could check it by the mile markers.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Are you one flat road (not accending or decending a hill) for both readings?

I see a couple hundred RPM change from cruising a constant 60 mph, to accellerating without a down-shift.

Jeff Pierce

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Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F

AM = uphill, PM = downhill?

The torque converter never 'locks' like some cars, so you can get 100-200 rpm difference at 70mph, before it changes speed much, by playing with the pedal.

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