99 GT - Blown Tranny?

[Spidey]

I appear to have no forward gears. The car drives fine in reverse, but when in a forward gear (1-2-D- D+OD) it will proceed to inch forward, as it builds up inertia, it will begin to accelerate.

Anyone have any ideas?

It's a 1999 Ford Mustang GT Automatic.

Does this car have the AODE or 4R70W? Anyone?

 

[Smokeurhonda]

It has a 4R70W. First thing I would check is your fluid. When was the last time you had a tranny service? Look at the fluid, if it hasn't been to long since a change and the fluid looks dark brown black and smells burnt, or if you can see debris on the dipstick good chance you fried it. But start with the basics before you jump to conclusions.

Also not quite sure what you are explaining. WHat happens in gear when you hit the gas?

 

[CobraRed_96_GT]

It's the AODE model "and" 4R70W since it's the electronic form of the AOD (hence AOD-Electronic), yet still a lil different.

but when in a forward gear (1-2-D- D+OD) it will proceed to inch forward, as it builds up inertia, it will begin to accelerate.

what do you mean here? It only inches forward at first under throttle? If it wont go into forward gears it's most likely the clutch packs, if it wont shift out of 1st in 2nd (or it's an overly long shift) or out of 2nd into 3rd (or it's an overly long shift) it's the accumulator housing and piston due to extended wear from the accumulator piston being metal instead of plastic/rubber like it should. If it wont go into 4th then it's a o/d clutch band problem, or the servo gear.
Does it "shimmy" under higher gear/low rpm acceleration?

 

[Spidey]

It's the AODE model "and" 4R70W since it's the electronic form of the AOD (hence AOD-Electronic), yet still a lil different.


what do you mean here? It only inches forward at first under throttle? If it wont go into forward gears it's most likely the clutch packs, if it wont shift out of 1st in 2nd (or it's an overly long shift) or out of 2nd into 3rd (or it's an overly long shift) it's the accumulator housing and piston due to extended wear from the accumulator piston being metal instead of plastic/rubber like it should. If it wont go into 4th then it's a o/d clutch band problem, or the servo gear.
Does it "shimmy" under higher gear/low rpm acceleration?

To answer the previous question up above, the tranny was just serviced. I had shift issues with it (not shifting, hard shifting, dropping shifts, etc). It had a filter kit in and new fluid.

What it does is that when you're in 1st, 2nd, or Drive (with or without OD engaged), it will just inch forward with throttle on for about 10seconds until it builds up enough inertia to go a little bit faster.

 

[CobraRed_96_GT]

To answer the previous question up above, the tranny was just serviced. I had shift issues with it (not shifting, hard shifting, dropping shifts, etc). It had a filter kit in and new fluid.

What it does is that when you're in 1st, 2nd, or Drive (with or without OD engaged), it will just inch forward with throttle on for about 10seconds until it builds up enough inertia to go a little bit faster.

heat deteriorated torque converter sounds like the problem for the initial acceleration, hard or hanging shifts are the accumulator pistons being worn from heat as well. These trannys are heat slush boxes. I hope it isn't too bad in there, mine needed a rebuild - so i just went ballz out and built a Stage II w/ a 3200 stall, most important part being a big trans cooler in front of the condenser

 

[steve_stang2003]

To answer the previous question up above, the tranny was just serviced. I had shift issues with it (not shifting, hard shifting, dropping shifts, etc). It had a filter kit in and new fluid.

What it does is that when you're in 1st, 2nd, or Drive (with or without OD engaged), it will just inch forward with throttle on for about 10seconds until it builds up enough inertia to go a little bit faster.

Did they use Mercon V which is what I believe the 99+ trannies use?

If they used stuff that says Mercon/Dexron then you are screwed because they used the wrong fluid.

 

[CobraRed_96_GT]

Did they use Mercon V which is what I believe the 99+ trannies use?

If they used stuff that says Mercon/Dexron then you are screwed because they used the wrong fluid.

No one puts the Mercon V in unless you ask/pay them to. It can/should go into all 4R70W's and 4R75W's as it prevents some heat break down and torque converter shudder symptoms. I put in Mobil 1 synthetic and it's damn expensive filling up a bare tranny with that stuff, worth every dollar tho.

 

[steve_stang2003]

No one puts the Mercon V in unless you ask/pay them to. It can/should go into all 4R70W's and 4R75W's as it prevents some heat break down and torque converter shudder symptoms. I put in Mobil 1 synthetic and it's damn expensive filling up a bare tranny with that stuff, worth every dollar tho.

I may be wrong but I believe Castrol Mercon V is the only after market brand certified by Ford for Ford's that require Mercon V.

http://www.castrol.com/castrol/sectiongenericarticle.do?categoryId=82915490&contentId=7028223


http://www.mercedesshop.com/shopforum/showthread.php?t=201492&page=2

Scroll down and read the labels CAREFULLY.
One is for the older fluid and one is for the newest version.
Make sure you read the one for the newer version.



I could be wrong on this one though but anytime I see Dexron/Mercon on the same label I wonder.

 

[CobraRed_96_GT]

I may be wrong but I believe Castrol Mercon V is the only after market brand certified by Ford for Ford's that require Mercon V.

http://www.castrol.com/castrol/sectiongenericarticle.do?categoryId=82915490&contentId=7028223


http://www.mercedesshop.com/shopforum/showthread.php?t=201492&page=2

Scroll down and read the labels CAREFULLY.
One is for the older fluid and one is for the newest version.
Make sure you read the one for the newer version.



I could be wrong on this one though but anytime I see Dexron/Mercon on the same label I wonder.

You're right, i know - ford recommend the V formula to prevent the aforementioned problems because it's synthetic, which can handle the heat. But few shops will just put it in there as a default - since in the owners manual it says III cuz V hadn't come out yet. So they will put in whatever is cheaper w/out asking you.

 

[steve_stang2003]

You're right, i know - ford recommend the V formula to prevent the aforementioned problems because it's synthetic, which can handle the heat. But few shops will just put it in there as a default - since in the owners manual it says III cuz V hadn't come out yet. So they will put in whatever is cheaper w/out asking you.

Correct!!!!!

The reason they can get away with it is because by the time the tranny explodes, the last thing the customer will do is blame the shop.

IOW you can use just about any tranny fluid in any tranny and at worst you might get torque converter shudder or maybe delayed or slightly rough shifting and that is worst case.
It will however *work*.

The problem is, it won't work for long and when the seals swell or heat kills things you will be in for a very high bill.

What gets me is Mobil's very deceptive label.

Look on the front and it looks like a perfect low cost alternative for Ford Mercon V.

Read the back and it's a little unclear with no real commitment being made. They start talking about type H fluid etc...

Very confusing IMHO.

They key phrase IMHO is Dexron/Mercon, meaning one fluid for both applications.

I shy away from stuff like that.

Compare to Castrol, which says right on the bottle, approved by Ford for Mercon V applications.

Big difference IMHO...

It wouldn't surprise me to discover that Castrol makes the Mercon V for Ford.
In general when one of these new fluids gets spec'd by a manufacturer, the first OEM to release the product after market is *generally* the company that makes it for the auto manufacturer.
Top secret stuff, but in general.

Chrysler did the same crap with their ATF+3, +4 and now +5 fluid....
Grossly overpriced from the dealer.