I am new to posting here and a long time lurker. Just wanted to say thanks in advance for the input.
I have a 2007 Nissan Frontier -
At 40k miles (where its at now) I smelled a burning smell coming from my engine compartment after driving for about 20 miles. Upon further investigation my transmission was almost bone dry. I went up to Auto Zone and bought 4 or 5 bottles of transmission fluid. The first I poured in seemed darker than I remember but I had just noticed the color of it when almost the whole bottle had been emptied. I started pouring the second bottle and immediately recognized the stark contrast in color between red (second bottle) and blackish (first bottle). Long story short, AutoZone sold me what I can only conclude was dirty engine oil inside of a new transmission fluid bottle.
I naturally went up to Auto Zone immediately (in a different vehicle) and complained, citing that I want them to pay for a transmission flush. I received very poor service, was accused in multiple ways of scamming them etc, etc.... long story short they paid for the transmission flush and I banned Auto Zone.
NOW, moving on... got the flush, new fluid, and noticed the burning smell again, went to my mechanic and it turned out my rear main transmission seal was burnt up and leaking. I baby my truck, but bought it at 38k miles and cannot speak to how the previous owner treated it. Though a burnt seal at 40k seems very odd to me. At any rate, $400.00 later the seal is replaced.
FINALLY my problem for you guys. Now that I got the truck back I drove it for a week and noticed a few very alarming things that were NOT there before.
1. A whining noise through all gears (automatic) when accelerating. And occasionally a louder grinding sort of noise. These noises are present even when my engine is warmed up after driving awhile.
2. It seems that when it comes time for the tranny to shift into 2nd or 4th it is delayed. I keep pressing the gas waiting for it to shift and my RMP's climb up to around 3500 sometimes before it will shift. If I release my foot off the gas and press on it again I can get it to shift.
Again, THESE problems were not there before what was mentioned above. My question is.... does anyone else notice similar problems in the Frontier trannys? How alarmed should I be? If they filled it with the wrong transmission fluid could that be causing the problem? I am probably going to run by the shop today, but as their the ones who changed the seal and didn't notice the problems I am describing I do not exactly trust them.
Any input is appreciated.
You know your truck has a 5 year 60,000 warranty that would cover your transmission.
Did you use the correct fluid?
If Warranty repairs are being done on a transmission listed in the chart on page 2, the listed fluid must be used. A claim to Nissan for warranty, service contract, or goodwill repairs to the transmissions listed below may be denied if Genuine Nissan ATF/CVT/eCVT Fluid is not used as specified by the part number in this bulletin. If Customer Pay service or repair of the transmissions listed below is done, the fluid type listed in the chart on page 2 must be used. Nissan recommends the Genuine Nissan ATF/CVT/eCVT fluid part number listed in Parts Information be used. See this bulletin for further detail.
Sound like you used the wrong type fluid, and your tranmission is beng destroyed.