Auto transmission

[Slayer7391]

I know ive heard of issues with the manual trans, but I just purchased a 2011 gt with Auto, and when I'm slowing down almost at a full stop. You feel like a bump going into the first gear. If you dont make a full stop as soon as it does this, and you go to accelerate you feel a bump like its getting back in gear.

What would cause this to happen, and is it serious issue with the transmission?

 

[GeorgeInNePa]

You are probably feeling drive shaft slop.

When it's tuned, it's more pronounced. I get more of a clunk, from the middle to the rear of the car.

 

[RedMustang]

You are probably feeling drive shaft slop.

When it's tuned, it's more pronounced. I get more of a clunk, from the middle to the rear of the car.

what is the fix for this ?

 

[Thereaper]

I have 1000 miles on my auto and the only time I notice anything like that is when the "Grade Assist" is activated.

 

[fdjizm]

what is the fix for this ?

An aftermarket aluminum driveshaft.

 

[BAKnBLK2010]

I know ive heard of issues with the manual trans, but I just purchased a 2011 gt with Auto, and when I'm slowing down almost at a full stop. You feel like a bump going into the first gear. If you dont make a full stop as soon as it does this, and you go to accelerate you feel a bump like its getting back in gear.

What would cause this to happen, and is it serious issue with the transmission?

My wife has a 2010 Sport Track Adrenalin Edition with the same tranny and hers does the same thing. We ask the dealer about it and they said it was normal and there weren't any computer updates available. She has 15,000 miles now with no problems so I would think it's not hurting anything.

 

[fiveoh]

Mine does this too.

 

[jsnyng]

Mine does it, too.

 

[WhiteStang]

I think its normal in these cars, dident get any better with a driveshaft, and was a little worse with a gear change.

 

[Sky Render]

Every 6-speed automatic transmission I've ever driven does this. Heck, my wife's 2008 Dodge Avenger does it, and it's not even a Ford.

 

[KJGT]

With a 4.17:1 1st gear ration in the trans you are going to know when it goes into 1st if the car is moving. More gear in the back will make it worse for sure.

Mine does it now and then, gradually slowing to a stop will really bring it out. I notice it more when I'm stuck in traffic and have to slow down to a stop 50 times a mile.

 

[hydro]

I know ive heard of issues with the manual trans, but I just purchased a 2011 gt with Auto, and when I'm slowing down almost at a full stop. You feel like a bump going into the first gear. If you dont make a full stop as soon as it does this, and you go to accelerate you feel a bump like its getting back in gear.

What would cause this to happen, and is it serious issue with the transmission?

I can relate this to the early 4speed hydramatic transmissions,when the line pressure is operating at a increased line pressure the trans tends to stay in 2nd gear until the car almost comes to a complete stop then abruptly shifts into 1st.That is the bump that you feel as it is in fact downshifting back into 1st gear.The autotrans in the 5.0 with the 412hp eng does have a fairly high line pressure so as not to allow the clutches in the trans to slip.
Is it harmfull? No it is a normal operating transmission.hydro

 

[orgchem]

Mine does this too, except it is VERY pronounced. Does it with stock tune, and is even more pronounced in my aftermarket race tune - so much so, that I don't run the tune for daily driving.

If I slow down almost to a stop but then quickly speed up (such as over a speed bump), I hear a loud 'click' that can also be felt through the pedal. If I stop relatively quickly, you can hear the 'click' going into first.

Took it to a dealer, and they basically shrugged it off to adaptive shift strategy or something (I'm sure that's probably crap)... there's been some instructions online about resetting the 'KAM' memory and then having the car re-learn shifting strategies, but I don't know the validity of it and it requires taking the car back to a dealership to reset KAM.

Not sure I quite understand the mechanics behind it, but every other auto car I've driven does not do this, so that's why I've been worried about it. But from reading these boards, doesn't seem like a big deal. Really does feel like I'm 'hurting' the car though.

I keep toying with the idea of going back to a dealership to see what the deal is, particularly before I get gears installed, but in all honesty it's a big pain to do that. Plus, I can imagine having a mechanic drive the car and not notice it at all.

 

[PBstallis]

pos auto, its gunna blow up into 357 pieces and send the driveshaft to shoot up into your back seat

 

[wbt]

pos auto, its gunna blow up into 357 pieces and send the driveshaft to shoot up into your back seat

Real constructive.....

The auto is better than the MT-82 you and I have. Suck it up and accept it.

 

[Sky Render]

Mine does this too, except it is VERY pronounced. Does it with stock tune, and is even more pronounced in my aftermarket race tune - so much so, that I don't run the tune for daily driving.

If I slow down almost to a stop but then quickly speed up (such as over a speed bump), I hear a loud 'click' that can also be felt through the pedal. If I stop relatively quickly, you can hear the 'click' going into first.

Took it to a dealer, and they basically shrugged it off to adaptive shift strategy or something (I'm sure that's probably crap)... there's been some instructions online about resetting the 'KAM' memory and then having the car re-learn shifting strategies, but I don't know the validity of it and it requires taking the car back to a dealership to reset KAM.

Not sure I quite understand the mechanics behind it, but every other auto car I've driven does not do this, so that's why I've been worried about it. But from reading these boards, doesn't seem like a big deal. Really does feel like I'm 'hurting' the car though.

I keep toying with the idea of going back to a dealership to see what the deal is, particularly before I get gears installed, but in all honesty it's a big pain to do that. Plus, I can imagine having a mechanic drive the car and not notice it at all.

Try loading the race tune, disconnecting the battery for 10 minutes, and then drive the car.

pos auto, its gunna blow up into 357 pieces and send the driveshaft to shoot up into your back seat

What transmission was having all the problems? Oh, that's right. It was the manual one.

 

[orgchem]

Try loading the race tune, disconnecting the battery for 10 minutes, and then drive the car.

Might give that a try today.

Not to spread voodoo, but here's a service message floating around regarding harsh downshifts (looks like it's for the 6R60 auto transmission)... not sure if it's applicable in our case or not, but just FYI:


----------------------------
Clear TCM keep alive memory (KAM) and adaptive tables.
Using IDS:
Open Toolbox.
Choose Powertrain.
Choose Reset KAM.
Then Choose TCM.
Using PDS:
Choose all Tests and Calibrations.
Scroll down the menu and Choose Reset TCM KAM.
NOTE: FOR PDS, RESET TCM KAM IS NOT THE SAME AS CLEAR TRANSMISSION ADAPTIVE TABLES, WHICH IS UNDER THE POWERTRAIN - TRANSMISSION MENU TREE.

NOTE: UNHOOKING THE BATTERY WILL NOT CLEAR THE TCM KAM. IT IS CRITICAL THAT TCM KAM BE CLEARED PRIOR TO RELEARNING THE ADAPTIVE TABLES FOR THE TRANSMISSION.

NOTE: DO NOT CLEAR THE PCM KAM.

Verify that the transmission fluid temperature (TFT) PID is above 175° F (80° C). If it is not at 175° F (80° C), drive unit approximately 3 miles (5 Km) to reach temperature.
NOTE: TFT MUST BE AT 175° F (80° C) OR ABOVE BEFORE PROCEEDING TO STEP 5.

NOTE: PERFORM ADAPTIVE SHIFT STRATEGY LEARN ON LEVEL SURFACE ROAD.

Drive unit to perform adaptive shift strategy learn.
a. Accelerate from rest with light throttle to 15 MPH (24 Km/h), remove foot from accelerator pedal.
b. Brake very gently to a complete stop (allow at least six (6) seconds).
c. Repeat steps (a-b) five (5) times in the dealership parking lot or similar setting.
d. Accelerate from rest with light throttle. The 1-2, 2-3, and 3-4 shifts occur at engine
speeds between 1700-2000 RPM.
e. Continue to accelerate gently to 50 MPH (80 Km/h) or the 5-6 upshift.
f. Brake gently to a complete stop and hold foot on brake for at least ten (10) seconds.
Repeat Steps (d-f) a total of three (3) times.
NOTE: THE HARSH BUMP FELT WHILE BRAKING TO A STOP WILL BE IMPROVED. HOWEVER, SEVERAL DAYS OF DRIVING MAY BE REQUIRED FOR THE TRANSMISSION TO FULLY ADAPT.

WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATION DESCRIPTION TIME
082404A 2006-2008 Explorer, Mountaineer 2007-2008 Explorer Sport Trac 6R60 Transmission: Check DTCs, Reprogram The PCM And TCM, Includes Time To Clear KAM And Perform Road Tests, Authorization Decal Not Required (Do Not Use With 12650D) 1.0 Hr.

 

[PBstallis]

Real constructive.....

The auto is better than the MT-82 you and I have. Suck it up and accept it.

never

 

[kdanner]

Might give that a try today.

Not to spread voodoo, but here's a service message floating around regarding harsh downshifts (looks like it's for the 6R60 auto transmission)... not sure if it's applicable in our case or not, but just FYI:

Whole different deal with those trucks. Mustangs don't have a TCM, the trans is controlled by the PCM.

 

[orgchem]

Whole different deal with those trucks. Mustangs don't have a TCM, the trans is controlled by the PCM.

So it is voodoo . I'm glad you pointed that out. I'd look pretty stupid taking that into a dealer and asking them to 'fix' my car based on it.