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Old 10-31-2004, 01:59 PM   #1
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Default Transmission problems? Torque converter?- Cause found!

Okay, I have searched the entire site and came up empty handed. Please help.

Engine is cold. Starts up fine, put it in drive and you can hear a "scraping sound". Its only when I press the gas. Normally only with a little gas and you can't hear it when you rev the engine. It only effects 1 thru D and all other gears not effected (P, R, N). Transmission fluid is at the right level. It may need a flush but I just bought the car and it has only 36K. The sounds isn't exactly metal on metal, but it sounds almost of a tennis shoe scraping on concrete or paper ripping. It goes away after about a mile. Any Ideas? I out of them. Please help.

On a side note. I am new to the site and you guys have already helped out more than the dealer. Thanks a bunch.
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Old 11-01-2004, 04:36 PM   #2
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Welcome to the forum. Glad to have you with us.

You may have read that the SSEi'* are prone to transmission problems. Mine died earlier this year, but I did not have the symptons you describe. Does the transmission shift OK...no shudders or slips?
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Old 11-01-2004, 05:01 PM   #3
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No, it shifts fine, no shuders, no lunges, no slips, just a sound. Its very faint, unless you are listening for it, you can barely hear it. But to me, its the same as a jackhammer going off outside my window at 2 a.m.
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Old 11-02-2004, 11:40 AM   #4
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Just a thought. Could it be a bad bearing. Only rubbing one way causing the sound?

I also found a TSB subject: 03-07-30-017 A/T - Grinding Noise/No Vehicle Movement in 'D' or 'R'.

If anybody has information on the TSB, please let me know.
Thanks
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Old 11-12-2004, 02:29 AM   #5
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A/T - Grinding Noise/No Vehicle Movement in 'D' or 'R'

File In Section: 07 - Transmission/Transaxle

Bulletin No.: 03-07-30-017

Date: May, 2003

TECHNICAL
Subject:
Grind Noise or No Vehicle Movement when Shifting into Drive or Reverse (Inspect Transaxle, Replace Various Transaxle Components)

Models:
1999-2002 Buick Century, LeSabre, Park Avenue
2002 Buick Rendezvous
1999-2002 Chevrolet Monte Carlo, Venture
2000-2002 Chevrolet Impala
1999-2002 Oldsmobile Intrigue, Silhouette
1999-2002 Pontiac Bonneville, Grand Prix, Montana
2001-2002 Pontiac Aztek
with Transaxle Auto 4-SPD, 4T65-E (RPO MN3)

Condition

Some customers may comment on a grinding noise when shifting into DRIVE or REVERSE or the vehicle will not move in DRIVE or REVERSE.

Correction
Important:
^ If the vehicle DOES NOT exhibit a grinding condition but DOES exhibit shifting concerns, refer to Corporate Bulletin # 00-07-30-002.

^ When servicing the transaxle side cover gasket, refer to Corporate Bulletin # 01-07-30-032.

^ When servicing the valve body spacer plate and/or gasket, refer to informational Corporate Bulletin # 02-07-30-014.

^ When servicing or replacing the transaxle resulting from this condition, the transaxle cooler MUST be flushed. Refer to informational Corporate Bulletin # 02-07-30-052.

Follow the service procedure below for diagnosis and correction of the grinding noise condition.
Important: If metallic debris is found on the transaxle pan magnet, the transaxle must be completely disassembled and cleaned. Failure to properly clean the transaxle case and internal components may lead to additional unnecessary repeat repairs.

1. Remove the transaxle oil pan and inspect the magnet in the bottom of the pan for metal debris. Refer to SI Document ID # 414136.

2. Remove the transaxle from the vehicle. Refer to the appropriate SI document.

Important:
^ Inspect all the transaxle components for damage or wear. Replace all damaged or worn components. The parts listed below should be sufficient to correct this concern.

^ This condition does not normally require replacement or reconditioning of the transaxle completely unless there is extensive damage. Components such as clutches, valve body and torque convertors WILL NOT require replacement to correct this condition.

3. Disassemble the transaxle. Refer to the Transmission Overhaul procedure in Unit Repair, SI Document ID # 633950.

^ (66 Input Sun Gear, P/N 24204098

^ (672) Input Complete Carrier Assembly, P/N 24204430

^ (674) Input/Reaction Carrier Thrust Bearing Assembly, P/N 24205127

^ (675) Reaction Complete Carrier Assembly, P/N 8646504

^ (676) Reaction Carrier/Sun Gear Thrust Bearing Assembly, P/N 8649353

4. Replace the parts listed above to correct this condition. Refer to Unit Repair Manual, Transmission Overhaul procedure, SI Document ID # 417561; Input and Third Sprag Clutches Disassemble, SI Document ID # 38901; and Input and Third Sprag Clutches Assemble, SI Document ID # 60415.

5. When servicing or replacing the transaxle resulting from this condition, the transaxle cooler MUST be flushed. Refer to informational Corporate Bulletin # 02-07-30-052.
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Old 11-14-2004, 07:31 AM   #6
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I found the cause of the sound, and feel like a complete idiot for it.
While under the hood yesterday checking all the pulleys for the cause of belt squeak (narrowed down to the idler pulley on the SC belt), I was telling my brother about the sound. So after each of us taking a turn listening while the other rev'd the engine,
BAM! The problem wasn't the tranny but the black ribbed intake tube. There was a slice on the bottom side. When sucking air through the hole, it was making a very funny sound which was bouncing off the transaxle. Went to the junkyard and $10 later, problem solved . Hopefully this will help with anybody who has this phenomenon happen to them. Thanks for your help guys.
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Old 11-14-2004, 09:50 PM   #7
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This was probably your IAC you were hearing. When cold most people with an airbox of intake of some kind will hear the rasping until the car warms up. In your case you were having air come in from an unbaffled source and so you heard it as well.
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