5spd auto problems HELP
Thread Starter
1st Gear Member
Joined: May 2007
Posts: 111
From: long island, NY
5spd auto problems HELP
ok, first problem started awhile ago, when coasting (decelerating due to 4.10 gears), it would slam into its downshift gear. dont know which one.
had the 30k flush and fill done, and now it does not do that anymore, it sometimes "slips"... meaning if im decelerating and then punch it, or sometimes (rarely) from a stop, it will rev up, and then slam into gear. not LOUDLY but enough that the tires spin.
maybe the tech used the wrong fluid? not enough? i saw him do it, and it looked like it all went in...
i took it to ford under warranty and removed the aftermarket intake and tune, problem is it threw an ABS code and was about 20mph off due to the gears, and threw codes from the 02 sensors because of my LT headers w/ hi-flo cats...ford wont pay to have the dealer tear apart the tranny until these codes can go away, and i cant make them go away without installing things that will obviously void the warranty. so im abandoning that idea.
help, im freakin BROKE i cant afford to pay thousands of bucks for a new tranny!!
had the 30k flush and fill done, and now it does not do that anymore, it sometimes "slips"... meaning if im decelerating and then punch it, or sometimes (rarely) from a stop, it will rev up, and then slam into gear. not LOUDLY but enough that the tires spin.
maybe the tech used the wrong fluid? not enough? i saw him do it, and it looked like it all went in...
i took it to ford under warranty and removed the aftermarket intake and tune, problem is it threw an ABS code and was about 20mph off due to the gears, and threw codes from the 02 sensors because of my LT headers w/ hi-flo cats...ford wont pay to have the dealer tear apart the tranny until these codes can go away, and i cant make them go away without installing things that will obviously void the warranty. so im abandoning that idea.
help, im freakin BROKE i cant afford to pay thousands of bucks for a new tranny!!
6th Gear Member
Joined: Jan 2008
Posts: 6,716
From: North Pole
my 93 rx-7 had the same problem described. it was 10 years ago exactly when I had the problem. turned out to be the torque converter, low transmission fluid and something else internally. Costed me about $1,500 to fix. That's not bad considering the TC was included.
Yours could be a simple tune problem though..
Yours could be a simple tune problem though..
2nd Gear Member
Joined: May 2008
Posts: 359
From: Los Angeles
Well, I am not surprised. At the very least switch to a new tune...Brentspeed is good but there are a number of good options out there. Hopefully your trans isn't too far gone. If you have another car you can use, order another tune and don't drive your Mustang again until you get that tune on there.
It's funny, I was thinking about making a thread about these problems (transmissions failing with Bamachips tunes) when I saw your post. I'm not one to go on the internet and bash companies, I just want people to be well informed about the tunes they're buying. I've found it interesting that EVERY car I've read about on various forums having these problems with the 5R55S, which inevitably lead to rebuilds, are using Bamachips tunes. It stops being just a coincidence after a while.
Anyway, change that tune and take the car to a reputable shop and have them drop the pan on the transmission, then you'll have a better idea about what kind of shape it's in. Are you getting any trouble codes or lights coming on?
It's funny, I was thinking about making a thread about these problems (transmissions failing with Bamachips tunes) when I saw your post. I'm not one to go on the internet and bash companies, I just want people to be well informed about the tunes they're buying. I've found it interesting that EVERY car I've read about on various forums having these problems with the 5R55S, which inevitably lead to rebuilds, are using Bamachips tunes. It stops being just a coincidence after a while.
Anyway, change that tune and take the car to a reputable shop and have them drop the pan on the transmission, then you'll have a better idea about what kind of shape it's in. Are you getting any trouble codes or lights coming on?
6th Gear Member
Joined: Jan 2008
Posts: 6,716
From: North Pole
Well, I am not surprised. At the very least switch to a new tune...Brentspeed is good but there are a number of good options out there. Hopefully your trans isn't too far gone. If you have another car you can use, order another tune and don't drive your Mustang again until you get that tune on there.
It's funny, I was thinking about making a thread about these problems (transmissions failing with Bamachips tunes) when I saw your post. I'm not one to go on the internet and bash companies, I just want people to be well informed about the tunes they're buying. I've found it interesting that EVERY car I've read about on various forums having these problems with the 5R55S, which inevitably lead to rebuilds, are using Bamachips tunes. It stops being just a coincidence after a while.
Anyway, change that tune and take the car to a reputable shop and have them drop the pan on the transmission, then you'll have a better idea about what kind of shape it's in. Are you getting any trouble codes or lights coming on?
It's funny, I was thinking about making a thread about these problems (transmissions failing with Bamachips tunes) when I saw your post. I'm not one to go on the internet and bash companies, I just want people to be well informed about the tunes they're buying. I've found it interesting that EVERY car I've read about on various forums having these problems with the 5R55S, which inevitably lead to rebuilds, are using Bamachips tunes. It stops being just a coincidence after a while.
Anyway, change that tune and take the car to a reputable shop and have them drop the pan on the transmission, then you'll have a better idea about what kind of shape it's in. Are you getting any trouble codes or lights coming on?
is it because it shifts very aggressive??? The bama race tune blows away the Brenspeed tune IMO. The brenspeed launches hard, but I can rip off the line like a **** with the bama tune..
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3rd Gear Member
Joined: Dec 2006
Posts: 944
From: Colorado
I have seen several 4.6 threads about this issue as well. I read on one of them that Dougs shift pressures are just set to high. I'm not throwing as much horsepower into the 5R55S as you guys are, but still after reading these threads, I reduced all my shift pressures by 25%.