automatic transmission noise - HELP!!!
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Joined: Apr 2003
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automatic transmission noise - HELP!!!
I'm new to this forum, so take it easy...
I have a stock '98 Maxima SE with 59,700 miles, that I bought from a reputable dealer a few years ago. I have always maintained it well and never had any major problems. I have been in 2 fender benders, that were professionally repaired, but nothing major.
Recently, when I accelerate hard from a stop I have been hearing a strange sound coming from what sounds like the transaxle. Everything is fine until the car gets to about 1800 - 2000 RPM, then it sounds very rough, almost as if something isn't lubricating properly. It is a mechanical sound that coincides with engine RPM. I think the problem is only in 1st gear in this RPM range because when I accelerate slowly, the sound doesn't occur, I think because the car shifts out of 1st gear before it hits those RPMs. I don't think its the engine, since the sound doesn't happen when I rev the engine in park.
I changed the engine oil (Castrol GTX) and transmission fluid (DEXRON III / MERCON). I didn't do a complete tranny flush, but I did get almost 6 quarts out of it. This seemed to help a little, but the problem is still there and has me worried. Would a full flush with Amsoil fix this, or at least help?
Has anybody ever had a problem like this or have any suggestions? My car is almost at the 60,000 mile mark, should I bring it in to a dealer before then to check it out? (since the power-train warranty runs out 60,000 miles, right?)
On what I think is an unrelated note, when starting the card in the morning (cold start), it sounds like the starter stays on for a half second or so after the engine turns over. I think this is unrelated, but any ideas? RPM sensor?
Thanks in advance,
Erik
I have a stock '98 Maxima SE with 59,700 miles, that I bought from a reputable dealer a few years ago. I have always maintained it well and never had any major problems. I have been in 2 fender benders, that were professionally repaired, but nothing major.
Recently, when I accelerate hard from a stop I have been hearing a strange sound coming from what sounds like the transaxle. Everything is fine until the car gets to about 1800 - 2000 RPM, then it sounds very rough, almost as if something isn't lubricating properly. It is a mechanical sound that coincides with engine RPM. I think the problem is only in 1st gear in this RPM range because when I accelerate slowly, the sound doesn't occur, I think because the car shifts out of 1st gear before it hits those RPMs. I don't think its the engine, since the sound doesn't happen when I rev the engine in park.
I changed the engine oil (Castrol GTX) and transmission fluid (DEXRON III / MERCON). I didn't do a complete tranny flush, but I did get almost 6 quarts out of it. This seemed to help a little, but the problem is still there and has me worried. Would a full flush with Amsoil fix this, or at least help?
Has anybody ever had a problem like this or have any suggestions? My car is almost at the 60,000 mile mark, should I bring it in to a dealer before then to check it out? (since the power-train warranty runs out 60,000 miles, right?)
On what I think is an unrelated note, when starting the card in the morning (cold start), it sounds like the starter stays on for a half second or so after the engine turns over. I think this is unrelated, but any ideas? RPM sensor?
Thanks in advance,
Erik
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