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Tranny slipping


buckethead

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Well, for the past month, when I start my car in the morning, my tranny slips for the first minute or so. I take off, and when the car goes to shift from first to second, it doesn't grab. It's like it just goes into neutral instead. I let off on the gas and wait untill it grabs again and i'm able to drive it out onto the main road. by the time i get there it's gone and runs completely normal with no slippage at all. It only happens when my car's been sitting over night or for other long periods of time. What could be causing this?

 

The fluid level is fine, but i did recently have a problem with a leaking tranny pan... it was a while before i noticed it. I tightened all the bolts on it, and topped off the fluid. I was considering completely changing my transmission fluid and filter, but someone told me not to do this because it could cause problems if it's never been done before. it has 92,000 miles on it and i bought it with 79,000. I have no idea if it was ever changed before i bought it. I'm really hoping it's a simple/cheap fix, cause if it's gonna cost me a grand to fix it, that spells goodbye to the car.

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Change the filter and fluid. If there's no mechanical problems to begin with, the fluid/filter change isn't going to hurt anything or cause problems. DO NOT perform a flush, however. Those are the things that fuck high-milage trannies over.

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It's not cold at all in the morning when i start my car.... I live in florida, so lately, the coldest it gets at night is only in the low 70s. I'm getting some info from a coworker on a place that does tranny flushes... she said that she brought her car there and they not only flush the tranny fluid, they clean it with another fluid, and then put some special restore fluid in it as well.... she said hers came with a 50,000 mile warantee. then again, her car is a mercedes and didn't have any existing problems, so who knows if i can get the same deal.... She's working on getting a price for me right now.

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If they will offer to do a flush, and then use the restore stuff, and also give you a warrantee, than I would Take it there. Just make sure that they will honour their warrantee, and that the tranny will work when they go to pull it into to the shop. Then if there are still problems, take the car in for warrantee work.

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i had the same exact problem back in december. I live in buffalo so you know the weather here is cold. dumped a bottle of mechanic in a bottle in, and within 15 miles of driving it shifts like new again. after a nice flush and fill with new filter runs like a champ. my guess to the problem would be a varnish and gunk buildup on a valve or something. the motor would rev like it was in neutral and then when pressure would build in the tranny it would grab and then go.

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well I got the fluid flushed out this past weekend.... cost me $90 at a mobile lube express. I was in there for an oil change and he looked at my tranny fluid... dabbed it on a piece of paper for me... "see your tranny fluid is supposed to be a healthy pink color... this here is brown!" So he hooked it up to his machine and flushed the system for me. I guess if there were any mechanical damage to the tranny, you would have seen some metal flakes going through the clear inlet tube on the machine, he told me there wasn't any so it was probably just burnt fluid.

 

Anyways, long story short, it runs like a champ now... no slipping, plus the shifing through any other gears is way way smoother.

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So he hooked it up to his machine and flushed the system for me. I guess if there were any mechanical damage to the tranny, you would have seen some metal flakes going through the clear inlet tube on the machine, he told me there wasn't any so it was probably just burnt fluid.

 

Anyways, long story short, it runs like a champ now... no slipping, plus the shifing through any other gears is way way smoother.

 

Did they do the filter also? Many of the quicky shops just hook up in line with the tranny cooler lines and exchange the fluid...but do not do the filter. I had a quicky shop tell my wife that it cleans the filter as it exchanges the fluid...it is ABSOLUTELY IMPOSSIBLE to clean the filter by exchanging fluid! :roll:

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So he hooked it up to his machine and flushed the system for me. I guess if there were any mechanical damage to the tranny, you would have seen some metal flakes going through the clear inlet tube on the machine, he told me there wasn't any so it was probably just burnt fluid.

 

Anyways, long story short, it runs like a champ now... no slipping, plus the shifing through any other gears is way way smoother.

 

Did they do the filter also? Many of the quicky shops just hook up in line with the tranny cooler lines and exchange the fluid...but do not do the filter. I had a quicky shop tell my wife that it cleans the filter as it exchanges the fluid...it is ABSOLUTELY IMPOSSIBLE to clean the filter by exchanging fluid! :roll:

 

 

Actually, he did tell me that. He said that the shop stopped replacing filters because it voided the warantee on some newer cars, plus they were prone to leaks afterwards.... I thought it seemed strange as well. He did tell me though that the way the machine worked was it moved the tranny fluid in the opposite direction and that pushed any of the debris out. Seems to make sense to me because the fluid would force any of that debris off the other side of the filter. At any rate i'm happy with the job he did because the car runs perfect now, way better even than when i first bought it.

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So he hooked it up to his machine and flushed the system for me. I guess if there were any mechanical damage to the tranny, you would have seen some metal flakes going through the clear inlet tube on the machine, he told me there wasn't any so it was probably just burnt fluid.

 

Anyways, long story short, it runs like a champ now... no slipping, plus the shifing through any other gears is way way smoother.

 

Did they do the filter also? Many of the quicky shops just hook up in line with the tranny cooler lines and exchange the fluid...but do not do the filter. I had a quicky shop tell my wife that it cleans the filter as it exchanges the fluid...it is ABSOLUTELY IMPOSSIBLE to clean the filter by exchanging fluid! :roll:

 

 

Actually, he did tell me that. He said that the shop stopped replacing filters because it voided the warantee on some newer cars, plus they were prone to leaks afterwards.... I thought it seemed strange as well. He did tell me though that the way the machine worked was it moved the tranny fluid in the opposite direction and that pushed any of the debris out. Seems to make sense to me because the fluid would force any of that debris off the other side of the filter. At any rate i'm happy with the job he did because the car runs perfect now, way better even than when i first bought it.

 

 

How many miles does your Buick have? I dont know if I should do this or drop the pan and change the fluid filter myself without the flush.

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It has 92,000 miles on it.... still a little young to have a tranny go on it. If your gonna drop the pan and replace the filter, i think you should go ahead and flush your whole tranny out. I think that mixing old and new fluid is gonna cause more issues than replacing it all.

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It has 92,000 miles on it.... still a little young to have a tranny go on it. If your gonna drop the pan and replace the filter, i think you should go ahead and flush your whole tranny out. I think that mixing old and new fluid is gonna cause more issues than replacing it all.

 

Really? Mines just about 100k and have heard some horor stories about it. My friend got his tranny flushed in his old Mazda and it was gone less than a month later. But my dad does suggest a flush as well :shrug:

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It has 92,000 miles on it.... still a little young to have a tranny go on it. If your gonna drop the pan and replace the filter, i think you should go ahead and flush your whole tranny out. I think that mixing old and new fluid is gonna cause more issues than replacing it all.

 

Really? Mines just about 100k and have heard some horor stories about it. My friend got his tranny flushed in his old Mazda and it was gone less than a month later. But my dad does suggest a flush as well :shrug:

 

Well, I'm no mechanic, but flushing worked for me (so far anyways). Like someone else said on this board, if it goes after a flush, it was gonna go anyways.

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Hoken just drop the pan, it's cheaper and you don't have to worry about any possibly transmission failure. Plus you get a new filter, and can see if there is shit on the bottem of the pan and clean the magnet. With a flush you could have a pound of metal shavings on the bottem but never know...

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Hoken just drop the pan, it's cheaper and you don't have to worry about any possibly transmission failure. Plus you get a new filter, and can see if there is shit on the bottem of the pan and clean the magnet. With a flush you could have a pound of metal shavings on the bottem but never know...

 

Yea . And hey does anyone have that link to Turbo(something i forgot) writeup on how to do this with pics and everything?

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