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Discussion Starter #1
2006 4x4 CC Automatic Transmission

I have always had the fluid changed at the Nissan dealership… once at 30k and then again at 65k.

I currently have 77k on the truck and there seems to be a hesitation in shifting when going from 1st gear to 2nd gear. And because of the known issue with ATF contamination from the radiator I am super sensitive to any anomalies in the transmission. All other shift points or transitions seemed to be fine. It just seems that it should engage a little quicker between 1st and 2nd gear.

Couple of questions
Is there an easy way to determine if there is any contamination in the fluid? I have used the dip stick for the ATF and it looks fine.. not cloudy or white-ish. I rather not pull the tranny plug.
Does the computer adapt to your driving style and shift accordingly? If so can that be reset so it “relearns” your behavior?
 

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If it is cold, the shifts will be a bit harsh at times.

Did the dealer do a power flush or just drain/fill? If they flushed it, that may have caused issues.

If you are really worried, you can always do a drain/fill of your own and check the old fluid. It only uses 4-6qts so it isn't extremely expensive.

Also, the computers do learn your driving habbits so if you want to reset them, just disconnect the negative overnight or just touch it to the positive for a few minutes and you should be good to go.
 

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Thanks for the reply.... not sure if they did a drain and fill or a flush.

The issue is that it is not harsh... almost drags or delays engaging 2nd gear. The only what to explain it is if you were driving a manual transmission and were shifting from 1st to 2nd and depressed the clutch slowly... The RPMs would remain steady but the clutch would engage slowly.

I have also noticed that my MPG has gone from a very consistent 18.5 to 17 mpg. But that may be related to the colder weather.


Thanks, I may try resetting the computer.
 

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How does the fluid look? Is it bright red or brick red? How does it smell?

Are you feeling slipping or just slow engaging?

It could be worn out disks/clutches but I doubt that. It could also be crap in the valve body but that may be a bit extreme.

I would check your recipt to see what they did. Flushes usually cost more then the drain/fill but it should be clearly noted on your bill.
 

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Discussion Starter #5
How does the fluid look? Is it bright red or brick red? How does it smell?

Are you feeling slipping or just slow engaging?

It could be worn out disks/clutches but I doubt that. It could also be crap in the valve body but that may be a bit extreme.

I would check your recipt to see what they did. Flushes usually cost more then the drain/fill but it should be clearly noted on your bill.
Thanks for the reply.... It is bright red almost pink. I didn't smell it so not really sure.

No slipping, just slow to engage.

I will check the receipt and see what it says.

Thanks
 

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regular non-reverse flow flushes from new will NOT give you problems, flushing a 100k transmission which has never been flushed before will give you problems
 

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The issue is that it is not harsh... almost drags or delays engaging 2nd gear. The only what to explain it is if you were driving a manual transmission and were shifting from 1st to 2nd and depressed the clutch slowly... The RPMs would remain steady but the clutch would engage slowly.

I have also noticed that my MPG has gone from a very consistent 18.5 to 17 mpg. But that may be related to the colder weather.


Thanks, I may try resetting the computer.
Hi Frontier LE,
My '06 has been doing something very similar for the past seven months or so. It first really became noticeable last August around 35K; the truck has never been abused, towed with or hauled over 400lbs. It seemed sluggish in general but the more I paid attention it seemed to be a result of being very slow to shift, exactly like you said being slow with clutching and shifting, primarily 1-2 but to a lesser extent 2-3 also. 3-4 and 4-5 are just like new and seamless. Also found that when slowing down from 40 or so to 20-25 and then accelerating again as you would in traffic, it felt like it was between gears and would finally engage harshly. But, when shifted manually it appeared to shift quickly and normally. Also, like you I found that gas mileage had dropped easily a few points.

I did a drain and fill with Matic-S and really found no difference. Made an appointment with the dealer and they said there were no stored codes and no SES light so there were no problems, "nothing's wrong, just drive it." But why did it change so noticeably after 3+ years?

I reviewed the FSM and thought that maybe it was something "learned" that needed to be erased. Nissan states that the battery must be disconnected for 24hours to fully clear any learned habits in the ECU. I tried that over Thanksgiving and while there was a slight difference in performance it really wasn't any better.

I stopped by the dealer again and asked if there was a chance that the ECU wasn't fully erased by disconnecting the battery, they said no that would have done it and any learned habits were cleared and it should be like new. They did a check for TSB's and said there was nothing and that the one for 08's and reflashing the computer only applied to 08's with a specific issue and they wouldn't do it to mine. I did get to drive an '08 with 40K+ on it and it seemed "normal" to me; but the dealer still said mine was fine and to just drive it.

So recently, colin123 posted a link on how to reset the ECU and recalibrate the accelerator and throttle position w/o disconnecting the battery, How to:ECU Reset,Throttle & Accelerator Position Learning - Nissan Titan Forum. This link stated that there is really no way to know how much data is erased and how quickly by disconnecting the battery and that to fully erase the data and recalibrate everything the proper procedure should be followed. I gave it a try and it did make a notable improvement. Truck was very peppy again and the shifts were quicker and smoother. With the very slightest of pressure on the accelerator you could feel the power build and you would move right out almost like new; the past seven months it was nothing like this. But, after a week and a half of driving the shifts were getting sluggish and delayed again. I just went through the procedure again last night and everything is good again but for how long?

I'm not sure what's going on. If it's learned response, why did it take three years to show up the first time? I'm wondering if something is malfunctioning and the computer is compensating for it?
 

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Had cross contamination, dip stick was fine but purple vasoline looking gunk on my radiator cap, drained the atf and found purple looking atf, did the by pass refilled and no more slipping.
 

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2006 4x4 CC Automatic Transmission

I have always had the fluid changed at the Nissan dealership… once at 30k and then again at 65k.

I currently have 77k on the truck and there seems to be a hesitation in shifting when going from 1st gear to 2nd gear. And because of the known issue with ATF contamination from the radiator I am super sensitive to any anomalies in the transmission. All other shift points or transitions seemed to be fine. It just seems that it should engage a little quicker between 1st and 2nd gear.

Couple of questions
Is there an easy way to determine if there is any contamination in the fluid? I have used the dip stick for the ATF and it looks fine.. not cloudy or white-ish. I rather not pull the tranny plug.
Does the computer adapt to your driving style and shift accordingly? If so can that be reset so it “relearns” your behavior?
Mine does what sounds like the same thing, although I'd describe mine as kind of "hanging on to 1st for too long" - it just seems that the shift is more delayed - the shift it self feels fine, no slipping, and the rest of the shifts are great... Mine also took about a year or two to show up, and resets don't help, maybe slightly at first I guess...

Fluid is good, although it is due for a change. I think I'm going to drop the pan, wipe everything down, clean out the bottom of the pan and then do a flush on it.
 
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