LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Major problems past 4000rpms. HELP!

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Old 09-19-2003, 08:00 AM
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Angry Major problems past 4000rpms. HELP!

My car is really starting to become a pain in the ***. Over the past few days every time I give it gas past 4000rpms its almost like it goes into neutral. It makes absolutly no power and revs much faster than normal up to 5900rpms.Up to about 3300 rpms that car acts perfectly normal though. It seems like the engine is operating fine but the tranny or something is not able to get the power to the rear wheels. Can someone help and tell me what this could be?
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Old 09-19-2003, 09:03 AM
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From your desciption,it sounds like the trans is slipping.Check the level and condition of the fluid.Have it tested.
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Old 09-19-2003, 09:08 AM
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I agree it sounds like the trans try pulling it down into first gear and then manually moving it into second. See if it still does it. Could be the OD sprag is hosed or that the line pressure is down. Pulling it down to 1st should up the line pressure and keep it from putting pressure on the OD sprag.
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Old 09-19-2003, 10:12 AM
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I just checked the tranny fluid and its seems just fine. Do you guys think it could be something else? Thanks!
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Old 09-19-2003, 10:42 AM
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Is it only when the car is under load that this happens? If so you can rest assured it's more than likely your tranny. How many miles on the car?
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Old 09-19-2003, 11:18 AM
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There are 87k miles on the car but the tranny was rebuilt at 68k. It only happens when you get the rpms to about 3500-4000.
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Old 09-19-2003, 11:48 AM
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Check the fluid level first along with color condition. Black fluid=bad tranny

But if its slipping under load its probbaly a clutch pack barely hanging on for life.
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Old 09-19-2003, 12:02 PM
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Tranny fluid is light brown. But if it was the cluth pack wouldnt it be bad during every shift even at low rpms?
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