Moderator: volvite
That does make me wonder what the operating temp would be in say 20 degree weather (I'll be driving it daily in the New England winter). And what the "safe" or "normal" range is supposed to be. I wish there was a Nissan tech on here. I just got my '05 Pathy last month and since hearing about this have been watching the issue closely. So far I've yet to do it.bellwilliam wrote:I've added a transmission fluid temp gauge. along with a fan in front of factory temp fluid cooler. and did a bypass.
cruising on freeway at night, 55F weather, I get 125F
cruising on freeway at day, 90F weather, I get 165F
towing 5k LB on freeway at day, 90F weather, I get 165-190F
towing 5k LB in traffic, 90F weather, I get 210-250F.
I also added an extra fan on the trans fluid cooler, it brings temp down another 5-15F depending on speed.
so the trans cooler inside radiator is to bring temp up when cold, and bring it down when hot. but since radiator operated in ~200F for emission reason, I think that's too hot for trans fluid. bypass is a good idea, imo.
I'm not so sure about this theory. Ever since I've owned mine, the transmission would "jerk" from 2nd into 3rd when cold. I have let mine idle for a very long time to see if it would make any difference, but it didn't. Once I've actually been driving around for a few minutes & everything is at a decent temperature, no more jerking whatsoever. Based only upon my experience, the rad does squat in terms of warming the transmission when at a standstill.jerry6 wrote:From what i read you just have to warm up on a cold day before taking off , they say you cannot cool the fluid to a point where it is detrimental , there is plenty of heat transfered from engine block and from trans internals once you are moving . Will just warm up a few minutes on a -10- -30 day Al Gore and his gulfstreams be damned
Your second paragraph contradicts what your original argument is lol. If the radiator doesnt do squat for the trans (which I agree with), why are you afraid of bypassing?NVSteve wrote:I'm not so sure about this theory. Ever since I've owned mine, the transmission would "jerk" from 2nd into 3rd when cold. I have let mine idle for a very long time to see if it would make any difference, but it didn't. Once I've actually been driving around for a few minutes & everything is at a decent temperature, no more jerking whatsoever. Based only upon my experience, the rad does squat in terms of warming the transmission when at a standstill.jerry6 wrote:From what i read you just have to warm up on a cold day before taking off , they say you cannot cool the fluid to a point where it is detrimental , there is plenty of heat transfered from engine block and from trans internals once you are moving . Will just warm up a few minutes on a -10- -30 day Al Gore and his gulfstreams be damned
I'm going to see if I have time to do the bypass this Saturday, but am a bit worried that it will make the initial transmission shifting even worse than it already is once the colder weather gets here.
In my mind, squat is still better than not having squat. I'm in a unique situation because nobody else on this forum, or others that I've read, have the cold transmission jerky shift into 3rd. Last thing I want to do is make it worse. At least the whole process is easy enough to undo if it does make things worse.Budrbean wrote: Your second paragraph contradicts what your original argument is lol. If the radiator doesnt do squat for the trans (which I agree with), why are you afraid of bypassing?
BNVSteve wrote:In my mind, squat is still better than not having squat. I'm in a unique situation because nobody else on this forum, or others that I've read, have the cold transmission jerky shift into 3rd. Last thing I want to do is make it worse. At least the whole process is easy enough to undo if it does make things worse.Budrbean wrote: Your second paragraph contradicts what your original argument is lol. If the radiator doesnt do squat for the trans (which I agree with), why are you afraid of bypassing?
'07 with 38k miles. One the air temperature hits about 44 & below is when the jerky shift happens. It actually doesn't matter if it's 40F or -15F, as the jerkiness is the same. Not a huge deal-I have myself trained to slow down right before the shift so that it shifts at low RPMs w/out the jerk. It's just really annoying.jerry6 wrote: What year and how many miles ? mines a 2007 I have never noticed jerky shifts into 3rd and I go straight from my house 1/4 mile and hit the highway in -30 during winter .
On an '08+, the hose goes to the radiator cooler, then wraps around the radiator on the driver's side(still hose and not hard line) to the auxiliary cooler, which is on the driver's side instead of the passenger's side like the older models. The piping then enters a hard line that wraps around the front to the passenger's side and back to the transmission.skinny2 wrote:Has anyone made the switch on an '08+? The piping is different on mine and it's not plug and play. Just curious if anyone has throught through this and/or has ideas. I got under mine to make the switch and found the piping totally different and left it alone for now. If I'm the first....I guess I'll have to lay under there and stare at it a bit longer.