Doesn't sound too far off, my 1200 used to run around 3600-3700 at 70mph. The 1500s are higher geared by about 500 rpm at 70. Or therabouts. Check your rear caliper, they do occasionally stick and then your brake will drag a bit. It should be free enough to move back and forth a bit with light hand pressure. If one pad is worn a lot more than the other that's a symptom of a stuck caliper.My question is 60mph @ 3000rpm in top gear normal?
Yes...are you sure that something dragging wouldn't cause the motor to run at higher rpms to achieve the same speed?
What was the problem? Dragging brakes would just hold both the speed and the engine revs down. Slippy clutch would bring the revs up.But 3000rpm at 60mphdoesn't sound unusual.
Oregonwinger, those older GM vehicles lock the converter solid when in TCC lock up,, the newer GM vehicles pulse width modulate the converters to allow slight slippage depending on the vehicle speed & load & throttle opening.3k at 60. About right. My Toronado is doing about 1500 at 60. Quite a difference. But at light throttle, it pulses. Very annoying. Put a switch in the lock-up to kill the surge. Hurts mileage, tho, and it runs about 2k w/o lockup.
Oregonwinger, yes, that original low voltage fast rise glow plug system was a real pain as the plugs burnt out quickly. What is your glow time now before cranking?This is a "diesel" Don't laugh. I have it very reliable. What a pain it was in the beginning. None of the fuel system is original, except nozzles, and inj. lines. Cat bolts on the heads, and mains. Had a few of them break. Got rid of the troublesome, unreliable glowplug system. Just have a set of limiting glow plugs, and a return to center toggle switch. So, it's like starting a D-8, or such. Very reliable. Still no power, tho. It does have a EGR. Think that might work on the diesel? I thot about blocking it off. Don't have to do I-M anymore.