Tranny/Diff issues

[gotoakandfreeze]

Hello all...

I took my Titan and TT on it's first "real" journey this week. I have some diff bake, but not too bad. I will check/change the fluid tomorrow. Thank you all for the info! My question is... when I put the tranny in "tow mode" and manual shift it seems to me that it does not have the desired effect on the torque converter. My tranny seeks too often when towing. I am sitting here talking myself out of it, but I am pretty sure it still goes in to OD. The indicator changes from D to 4, but there is no other noticeable change. So it goes OD, 4th, 3rd, 4th, OD on some hills and wind conditions. Not only really annoying, it can't be good for the truck. If it would stay in 4th like it should everything would be dandy. I have also had the tranny temp spike that some one else mentioned, but I was in manual shift and tow mode. As soon as I shifted to 3rd, all was right in the universe... other than the excessive RPMs.

Thanks!

[terryj5815]

How did the change go? We have a Se 4x2; towpkg; etc and we are starting out in mid Sept to Visit Ontario especially Niagra on the Lake w/ our Award 30 classic about 6k. will come out at Detroit via St. Louis to K.c about 2k miles. our T was made in March.

[Steamguy]

Originally Posted by gotoakandfreeze

Hello all...

<snip> My tranny seeks too often when towing. ...it can't be good for the truck. If it would stay in 4th like it should everything would be dandy. ... As soon as I shifted to 3rd, all was right in the universe... other than the excessive RPMs.
<snip>

Goto,

I tow a 6800# Arctic Fox 26J, and went to Colorado a couple months ago, a journey of about 2,700 miles. Here's what I found, after fiddling around a lot (and telling my wife to ignore my muttering):

Tow in Manual, 4th. You can use cruise and all, the tranny won't hunt, but you will have to 'tiptronic' it down a gear for the long hills when you lose more than about 12 MPH. When you hit the top, just toggle it up. You can't go into Drive while in Manual except by pushing the button on the shifter (at least on my column shift). So if the sun's in your eyes, you don't have to worry, just toggle it up a couple of times.

If you slam the gas, the trans will shift down, engine will scream, and away you go. When you let up, it won't go up past the gear you have selected in Manual.

Nugget:
I found NO difference between Tow mode and Standard mode in Manual. Notice I say in MANUAL. The shift points were the same. The trans did hunt a LOT when in D, Tow mode or Standard. 'Way too much.

Nissan needs to work on this firmware a LOT. Tow mode shouldn't really let you hit 5th unless it's going to stay there. Otherwise, I have found it to be useless.

...Nissan, are you listening??

[gotoakandfreeze]

AMEN!

I so wish that it would not hit 5th or OD... whatever it's called. That is my only gripe!

Funny story! I changed my rear diff fluid...

I drained it and it was BAKED. the good news was that it was full. It stunk BAD. After 15 mins I looked around and there were fire trucks everywhere! The neighbors had called them because they thought my diff fluid was a natural gas leak. It makes me wonder what in the heck they use for fluid from the factory. Also... there were NO metal shavings on the magnet or in the fluid. Yipee!

Later!!!

[PrerunnerGreg]

Usally the tranny will have the tourque converter locked-up when cruising at a steady pace, and when you shift into another gear it will unlock the converter then lock it after a few moments. It will feel like two distinct shifts but it is really in the same gear. Most modern trannys will only lock the highest gear selected, 5th, if drive is selected, or 4th, if its "locked" in 4th. But it won't go into lockup in 4th if 5th is selected. I hope I haven't confused anyone. BTW, for those not familiar "lock-up" is not in the trans itself but in the convertor, when "locked" there should be no slip between the motor and trans.