ATF Cooler...

[cyyoung2000]

First off I wanna thank everyone from Nicoclub.com for all the help!! This is BY FAR THE BEST site when compared to ANY other car forum... Well I'm goin to order an auxiliary ATF cooler for the 91 Q. Just wondering if I'll need anything else to install it, or if the kit comes with everything you need, thanks http://store.summitracing.com/...w=sku

[elwesso]

The only thing you MAY need is some extra hose. But other than that you should be good, whatever you cna get at autozone is fine

[maxnix]

The kit is complete. To mount like I did under the fender in the active cooler location, it helps to have a couple of longer SS bolts.

[szh]

Is the 70264 better than the 70268? As I recall, the 70268 is what I had had installed on my 1995 Q45 - the 70268 seems a bit thinner and might be a better fit in the engine compartment ...(?)

Z

[elwesso]

the 70264 is a little bigger and has a bit more cooling capacity. Either one is a good choice and I dont think the difference is very substantial. The 70268 works very nicely if you place it between the radiator and condenser.

[AlabamaDan]

Where's the best place to install it. I plan to install one in the next few months. Where exactly was the "active cooler location"?

[elwesso]

IMO between the radiator and condenser mounted low is the best place. It will get sufficient airflow at high speeds but not so much that it could cause the trans to get TOO cold.

[lino]

I have the 70268 and the only thing we needed extra was some tie wraps and clamps. For some reason the mechanic said some of the parts provided with the kit I bought were not suitable and so he grabbed some stuff off of his shelf.

The difference between the 2:B&M 70268 SuperCooler rated at 13,000 BTU 11"x7-1/2"x3/4"B&M 70264 SuperCooler rated at 14,400 BTU 11"x6"x1-1/2"

[szh]

The 70268 works very nicely if you place it between the radiator and condenser.

That is where it was on mine.

Z

[Skibane]

IMO between the radiator and condenser mounted low is the best place.

It's a good location, but involves pulling the radiator, belt-driven fan, etc.

So, while you've got the radiator out, you might also consider calling Joe for a fresh set of 4 hoses, fan belts (MUCH easier to install with the radiator out!) and maybe even a replacement for that cracked plastic fan and tired ol' fan clutch. (And BTW, how old is your water pump? )

Obviously, this could turn into a semi-expensive project, but you'd end up with almost all of the most failure-prone cooling system parts replaced.

Also, note that the B&M #70264 is 1-1/2" thick - I'm not sure that it would fit between the radiator and A/C condensor. In this particular mounting location, thinner is better.

[maxnix]

Is the 70264 better than the 70268? As I recall, the 70268 is what I had had installed on my 1995 Q45 - the 70268 seems a bit thinner and might be a better fit in the engine compartment ...(?)

Z

70264 is larger capacity, but I think it is a very tight fit behind the condensor. Have you done your Y34 yet?

[maxnix]

It's a good location, but involves pulling the radiator, belt-driven fan, etc.

So, while you've got the radiator out, you might also consider calling Joe for a fresh set of 4 hoses, fan belts (MUCH easier to install with the radiator out!) and maybe even a replacement for that cracked plastic fan and tired ol' fan clutch. (And BTW, how old is your water pump? )

Don't forget the foam airblocks also. They are crumbling by now.

[szh]

70264 is larger capacity, but I think it is a very tight fit behind the condensor. Have you done your Y34 yet?

No ... not yet.

Hmmm, do I need to? Has anybody looked at doing this on the M45's or the current-gen Q45's?

Z

[elwesso]

I just installed a trans cooler on a 94 Q and I didnt have to pull the radiator. I dont like using those ties that go through the fins of the radiator because its impossible to remove the cooler if you would ever need to. I tried and busted a nice radiator..

[maxnix]

Hmmm, do I need to? Has anybody looked at doing this on the M45's or the current-gen Q45's?

Z

You where there are hills? Do you leave it in D while stopped on a hill?

How long do you want to keep it? Principle is the same although the cars are different. The 5 speed is a lighter duty transmission.
Modified by maxnix at 8:03 AM 7/20/2007

[szh]

You where there are hills?

A few minor ones around here. I always drive in 4th gear setting (i.e., out of D) when I am not on the highway, so these are not taken in 5th gear.

Do you leave it in D while stopped on a hill?

Um ... I try not to stop on a hill if I can avoid it. . If I needed to, I'd put my foot on the brake and keep it there while stopped.

How long do you want to keep it? Principle is the same although the cars are different. The 5 speed is a lighter duty transmission.

Point ... I will look into what makes sense to do on the 2003 M45 inre ATF coolers. There isn't much room inside the engine compartment for stuff!

I want to keep it as long as I can, of course. I am doing full transmission flushes every 30k miles (next one is due in 8k miles) for the other normal maintenance. It is much more expensive Fluid J in these transmissions!

Z

[elwesso]

I would think you oculd put one between the radiator and condensor like you do on the G50s.

[szh]

I would think you could put one between the radiator and condensor like you do on the G50s.

I will definitely take a look sometime ... probably this weekend.

Z

[Black stallion]

Wes, or anybody,I just put a $175 oem trans filter on my 94 knowing I was going to add the cooler, but not knowing a couple ppl here said they removed theirs to add the cooler. What are the pros/cons of this or can I still keep the filter in addition to the cooler? - while we're on the subject of atf coolers

[maxnix]

Yes, but you will need to consolidate the two out put lines from the external filter to one input to the ATF cooler.

[Q45tech]

Since you know 10 quarts capacity and the flow is 2.5-3.0 quarts per minute and the 13,000 or 14,400 BTU per hour cooling you can calculate the temperature drop comparisons.

Start with 200F and try some varying heat load numbers.....................if 13,000 btu provides 20F temp drop doesn't 14,400 increase this by 10% ~~22F.

100F ambient air with AC off it different from 130F air ac on.

[qship96]

Wes, or anybody,I just put a $175 oem trans filter on my 94 knowing I was going to add the cooler, but not knowing a couple ppl here said they removed theirs to add the cooler. What are the pros/cons of this or can I still keep the filter in addition to the cooler? - while we're on the subject of atf coolers

WOW- $175.00? I paid about $ 75-80 last time I bought one from Joe-what is yours,gold plated?

[Black stallion]

Platinum edition! Actually that was dealer cost. I never pay dealer cost. It's already high, then my local dealer adds about 5% to that

I manage to get all my oem parts wholesale minus a few bucks

[DrewQ45]

Does anyone know if a transmission filter apparatus from a 95' can easily be transferred to a 90-93 G50? The thought just hit me.

[elwesso]

IMO if you wanted to go with a filter id go with one from summit racing that uses replaceable filters. The kits arent expensive and should slide right in real easy if you already have a cooler.

[qship96]

Does anyone know if a transmission filter apparatus from a 95' can easily be transferred to a 90-93 G50? The thought just hit me.

yes,and it comes with a special bracket formed to bolt right into place!the only mod would be to join the 2 output hoses from filter into 1 input for your single trans cooler built into radiator{or better yet replace rad. with a new model made for 94-96q that has 2 trans coolers built in}

[AlabamaDan]

So now we're talking about two mods, (1) a transmission cooler and (2) an external filter. I thought the cooler was enough.

[Q45tech]

Any filter is better than no filter on a 90-93Q. Since warm oil and even cool ATF are roughly the same viscosity and the average oil flow vs peak ATF flow are about equal.

Unfortunately suddenly deciding to filter ATF after 30-60k means a lot of wear and damage has already occurred.

Do a chemical BG Quick clean flush FIRST to avoid load up a filter needlessly.

In a pinch something like oem gasoline filter might be used for a short time to clean the ATF of particles but the capacity is very very very limited [a day or two] and the cold ATF would be more restrictive than gasoline.

With the cost of super synthetic ATF, a filter would be very cost effective if it allowed you to defer a full ATF replacement from 30k to just every 45k.

Same with a large external heat exchanger to limit degradation rate.

[DrewQ45]

yes,and it comes with a special bracket formed to bolt right into place!the only mod would be to join the 2 output hoses from filter into 1 input for your single trans cooler built into radiator{or better yet replace rad. with a new model made for 94-96q that has 2 trans coolers built in}

Relaced my rad with aftermarket a year ago. I bypass the internal cooler for external B&M.

[DrewQ45]

So now we're talking about two mods, (1) a transmission cooler and (2) an external filter. I thought the cooler was enough.

If you ask me, the external filter is a great mod. Nissan did it so it must be good!!! The clogging of the pan filter seems to be increasingly common nowadays and will do more damage than heat alone. (Temp level of transmission will rise proportionately as blockage increases) Do a search under my ID for transmission filter flush method. If done along with a chemical flush then external filter installed, there would never be a reason to clean/change the pan filter again!

...Drew...