My aunt's 94 CS 3.4, runs at high rpm's

[ZoomZoomFan]

When she is cruising on the interstate at about 75, it's turning at about 4k, or at least that's what the tach says. Doing about 45 or 50 on a backroad, it is still at 3k rpm. It's done this ever since she got it a few years ago. It doesn't seem to effect the car much, so.......is it normal for those engines to do that? This is the first 3.4 I've been around for a while. :oops:

[pitzel]

Sounds like your TCC isn't working properly. Either that, or somehow the tranny is shifting into just Drive, and not Overdrive (D).

 

More of a transmission problem than anything. Don't know much about the 4T60-E, surely someone else can chime in.

[MoTox8410]

4k seem high even in just drive

[jdcutty]

with the 4t60e, at 75 it should be running around 2500 rpm. Again, sounds like the TCC isn't working properly.