Seems like my gearing changed?? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 04-10-2006, 12:06 PM   #1
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Default Seems like my gearing changed??

Ok, most of you are gonna call me nuts for making a post like this, but oh well.

Yesterday, I took a trip to Bathurst, 3 to 4 hours away.

Right now, I'm guessing I have the tall gears, 3.33. When I am driving like normal everyday, the TCC engages at 80 KPH, like normal. It brings the engine RPM down to 1200-1300. 100 KPH, the engine spins at 1500 RPM. 120 KPH, the engine spins at 2000 RPM.

Now, while I drove for a couple of hours, and comming back, it seemed my gearing changed. When I was going 60 KPH, the TCC would engage, and rpms would be 1200. At 80, it would be at 1500 RPM. at 100, it'd be at 2000 rpm.
Can anyone explain this?

Another question. I was driving in sorta mild weather. It seemed the car had not as much power as it should. Passing people required me to bury the throttle pedal. Going up hills was a little slow, and required me to yet, bury the pedal. I am absolutly sure I revved it to 5000 rpm alot of times. Any solutions for this? Or is it normal, and I should junk my beloved 3800 and 4t60 for a Supercharged 3800??

LAST question! Is it normal for oil pressure to be at 250 KPA in idle? Also, I noticed whenever I coasted the engine, (remove foot from throttle) the oil pressure guage fell back a bit, and when it neared 275 KPA, it flickered, and then rested arounds that area. That normal?

I am going to fill up my car today, i'll let everyone know how many liters it took, but I can tell you, I put 570 KMS on a tank of gas, going there and back. (not including the gas its going to take to get to the gas station.)

Anyways, had a good trip, car worked very well, and it took all 6 of us, so I don't think the mileage is that bad!! Its awesome!
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Old 04-12-2006, 10:22 AM   #2
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Overdrive not engaging? Any difference if you move the shift between Drive and Overdrive?

How many miles on it? I seem to recall that was one of the first signs of my trans failing.
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