HWYSPEEDER
New member
I have a 2002 Pontiac Grand Prix GT 2 door with a 3.8 liter v6 and 93,000
miles. 2 wheel bearings, 2 tires, tune-up, and transmission fluid change
was done, and I keep having the same issue. Basically under slow
acceleration, the transmission shifts and performs without issue. Under
moderate to full acceleration, like when getting onto the highway, the
car won't shift, and will hold itself in gear at 4500 and the engine just
continues to make raise loudly until I let off the accelerator slightly, and
it shifts. I used to only notice the issue under full acceleration, but now
the issue is becoming more noticeable under moderate conditions, such as
merging onto a freeway, which is becoming slightly dangerous.
My mother drove the car, and she said the experience was similar to a
1.6 liter Hyundai Accent she drove, which felt powerless and difficult to
drive on the highway. Today when I was merging onto a bypass, I floored
the car at about 30 mph and the engine made a loud grating, sound,
similar to putting cards in the spokes of a bicycle. I heard the same sound
when the engine blew in a 3.4 liter v6 Grand am. I let off the gas and
pulled over and the engine was running quietly, and the temperature of
the engine appeared normal. The engine starts and runs very smoothly,
and the spark plugs and wires, as well as the air filter had been replaced
recently during the tune-up. At one point when I was travelling at 50 mph
I floored the gas and watched the car take approximately 20 seconds to
accelerate to travel to 70mph.
We once had a Chevy Venture Minivan with the same engine and at about
134,000 miles, the trans started going and it had trouble shifting on the
highway. I'm wondering if this is possibly the same issue, and the trans is
on its last lap at 93,000 miles. I'd appreciate some of your input, thanks.
miles. 2 wheel bearings, 2 tires, tune-up, and transmission fluid change
was done, and I keep having the same issue. Basically under slow
acceleration, the transmission shifts and performs without issue. Under
moderate to full acceleration, like when getting onto the highway, the
car won't shift, and will hold itself in gear at 4500 and the engine just
continues to make raise loudly until I let off the accelerator slightly, and
it shifts. I used to only notice the issue under full acceleration, but now
the issue is becoming more noticeable under moderate conditions, such as
merging onto a freeway, which is becoming slightly dangerous.
My mother drove the car, and she said the experience was similar to a
1.6 liter Hyundai Accent she drove, which felt powerless and difficult to
drive on the highway. Today when I was merging onto a bypass, I floored
the car at about 30 mph and the engine made a loud grating, sound,
similar to putting cards in the spokes of a bicycle. I heard the same sound
when the engine blew in a 3.4 liter v6 Grand am. I let off the gas and
pulled over and the engine was running quietly, and the temperature of
the engine appeared normal. The engine starts and runs very smoothly,
and the spark plugs and wires, as well as the air filter had been replaced
recently during the tune-up. At one point when I was travelling at 50 mph
I floored the gas and watched the car take approximately 20 seconds to
accelerate to travel to 70mph.
We once had a Chevy Venture Minivan with the same engine and at about
134,000 miles, the trans started going and it had trouble shifting on the
highway. I'm wondering if this is possibly the same issue, and the trans is
on its last lap at 93,000 miles. I'd appreciate some of your input, thanks.
