engine RPM @ 70mph
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engine RPM @ 70mph
I was just curious, can anybody tell me why engine RPM'* would run a little higher at 70MPH while everything'* still cold (around 2200rpm) and then it soon settles down to around 1900rpm when its up to Temp. All the while it is in high gear, because if I manually pull it into a lower gear it jumps up to 2400rpm or so.
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The transmission won't go into overdrive until it sees the proper temperature of the transmission fluid. I've had normal engine temps, but it still hadn't gone into overdrive. Once the tranny fluid warms up, it will go into overdrive, and the rpms will drop.
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Originally Posted by Archon
The transmission won't go into overdrive until it sees the proper temperature of the transmission fluid.
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Switch to a good synthetic engine oil (if you haven't already) and watch your cruising RPM'* drop another 100 or 200, reducing wear and saving fuel .
#7
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I meant to check today but I thought the transmission goes into 4th instead of 3rd fairly quickly after starting out cold but it'* that torque converter lockup that'* still allowing a higher speed for the motor.
As for adding synthetic oil to the motor that is not going to have any effect on the transmission shift points.
As for adding synthetic oil to the motor that is not going to have any effect on the transmission shift points.
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BoneZ. You're right for correcting me on the terminology. Lockup was what I was attempting to describe, rather than overdrive. I guess while we're at it, it doesn't really go into "lockup" the way the older transmissions do. There'* a precisely controlled amount of slip built in.
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Alot of people get overdrive and lockup confused and i was just trying to set the record striaght. No hard feelings Archon and certainly no offense.
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Originally Posted by imidazol
As for adding synthetic oil to the motor that is not going to have any effect on the transmission shift points.