I'm to lazy to repost the pictures on here but here is the link from Nissan Club that I posted.

http://www.nissanclub.com/forums/eng...ml#post3818636

 

Nice! Too bad the 6th Gen Maxima has a heatsink type cooler.

 

Nice......wish we could take advantage of that mod.

 

Holy freaking hell. Resize your pictures.

 

My Transmission was replaced in March and started leaking recently. My car is on extended warranty until Nov. 2010. The car was at the dealership Friday August 7th and it's leaking again in the front at the cooler. I'm pissed off that they did not fix the leak.

 

Danger Will Robinson! Danger!

Dude, you are restricting the coolant flow to your tranny! All that extra hose and the cooler create extra pressure drop.

 

^ Well fill me in then because there are others with Altimas that have done this, one being an auto with nitrous just like me and it has helped him, I have noticed a diffrence already in the way the car shifts which is better than it was.. So please fill me in on your thoughts please.. Not knocking you or trying to be a smart *** I just wanna know where your coming from..

 

the pictures arent big enough

 

^^^ I agree, the damn pictures are not big enough...^^^


LOL

whoa , wait never mind...they got resized by the browser...i think...

 

explain this .........



i am about to call you a tool.........................




we are waiting...........

 

Holy crap the Maxima God has spoken. 21 thousand posts? I definitly agree this guy does not know what he is talkin about. It's pretty hard to restrict fluid unless you install incorrect.

 

Ha.... i have about 6-9k posts deleted so........

well. i have seen no explaination.......

 

you should let me photshop that stewie for you and put a nissan logo on the shirt and change the colors of clothes.

 

Not the 2004!!!

 

How is pressure dropped in a closed loop system???

 

Great job, on my list of things to do!!!

 

Fluid flow, just like electrical flow follows the path of least resistance. Your coolant flow has 2 paths to take here-one to the transmission heat sink, and other one your traditional engine cooling path. When you increase the length of hose and add the cooler, it adds more resistance to that path. Even using a full size hose, pressure drop (think flow resistance) increases with every unit length of hose in addition to the pressure drop accross the cooler. Without going into a full discertation on fluid flow dynamics, trust me that the above is true even if we disagree on the results of the cooler. Thus adding resistance to one path, will increase flow to the other path. If you want to know more about fluid flow, Google "Bernoulli's Principle".

My statement above was based on the fact that you will be slowing down the flow to your transmission somewhat. Generally speaking faster fluid has a higher "Reynold's Number" (Google it if you want) which gives you better heat transfer coefficients due to higher turbulent effects. However....

I could be wrong about the end result. There have been some cases I have ran into where fluid flow has been too fast so that even with a higher heat transfer coefficient, there was not enough residence time for optimum heat transfer. In plain english: the coolant might go through the heat sink too quick with the stock setup for it to do its job. In this case then slowing it down is a good idea, not to mention you're cooling it a few degrees. The fluid would REALLY have to be hauling a** for this to be the case, and the engineer who designed the system should throw his/herself on their sword. Stranger things have happened...

Reading about all the tranny problems on these cars, I wanted to add a cooler. I did not for the above reasons. I don't know enough details about the pump, heat sink, and radiatior design to do the fluid flow calcs to be 100% sure. So, I figured I wouldn't risk hurting an already fragile tranny. If history and experience show that this mod helps, then I stand corrected and will probably add one myself. So, right or wrong I am not being a tool-I had my reasons. Let us know how things go long-term.

 

Some do (5 spd), some don't (4 spd). My 2004 does.

 

I have a 5spd AT and it does not have a heat sink?

 

For real? Mine does...<shrug>.

 

Does it have Traction Control???

 

Mine is a 5 sp and not TC or any of that nonsense. It does not have the heatsink type cooler. Also that path of least resistance crap is just that crap. When you install a tranny cooler you have to add more fluid to start with, not to mention the fluid in the system is pressurized when it heats up. So path of least resistance doesn't make sense in this arguement. The tranny cooler is taking the fluid from the tranny out and pushing it in through the radiator before it goes back into the tranny. The system is closed loop. take a look at the hoses that you will be connecting the cooler to, they are the same size in diameter. The cooler does not provide flow resistance due to the system being pressurize allready.

 

Thank you, same here no TC but also a 5Spd, and what he said ^ ^ ^. And also not all laws of Electrical power apply to Fluid Power since there are different affects (Ventura, viscosity, temperature, etc) can change the characteristics of how fluid flows.

 

Thanks Chris..

 

Call it crap all you want. I don't see a valid argument saying why I could be wrong with the exception of the possibility that I introduced.

It doesn't matter if it's closed loop or not or if you increased the total volume of fluid. If you increase the length of the flow path, then you increase flow resistance. It takes a bigger pump to flow a gallon/minute through a foot of line than a 100 foot of line or a mile of line. Try to drink a soda through a 5 ft long, straw size tube. You will find it much more difficult than drinking through a regular length straw even though they are the same size.

I also didn't say that all laws of Electrical Power apply to fluid flow, I was trying to make an analogy to explain my point. The properties do behave similarly in a number of ways and this analogy usually works when I need to explain something.

I perform fluid flow calculations and heat transfer calculations as part of my job on a regular basis. I deal with viscosity (kinematic and dynamic), venturi effects, and temperature, so I am perfectly aware of their effects.

Juiced SE-R, I must commend you for a good clean install. I wish your car the best, I was just voicing the concerns that I had when I considered doing the same. I hope you know I was not trying to dis you in any way.

 

Do you realize that this cooler that he installed does not cool the tranny fluid, but the coolant going to the tranny? Take a look at the diagram he created.

 

Cooler coolant to the tranny = cooler tranny.