I'm running 11x11x1.5 or so- RCDash was (is?) running one that I seem to recall was a bit bigger than that... Weslutes had a good sized one as well and we have discussed this before too- seems to me all quite a bit larger than 8.5 but perhaps not quite so large as 13 wide (edit- just read above weslutes is that size).

Up where I am we don't get too many REALLY warm days- a few but far between. I find it does take quite awhile for the fluid to warm up- which I could probably fix with a thermostatic controller of some sort (same as my engine oil cooler).

In your warmer environment... I think the limits of your cooler would be in where you have a place for it- moreso than its cooling performance.

 

Thanks, actually I am in Bangkok now, so we never have any cold days haha. I would use a manual transmission but with traffic here that is a no no, so I have to try to get a 5AT built here, not sure there are shops that can help with building the tranny though, so I will see if I can find out how to change the TC and install clutch packs. But I guess for transmission oil cooler, just get the biggest possible then with stainless steel hoses all the way.

 

SS lines seem to rub and chew through everything so I went with just braided lines

 

Yeah, I will just have them sleeved, or do nylon braided for this, how about the size, I am thinking AN10.
I read more about size, and it seems like I should go almost as big as I can, but how much can the pump handle ?? I just ordered a 19 row series 1 from Setrab and I have both 19 and 25 row series 6 on hand. I hope one of them will be good or I have to get some 34 or 40 row and a fan pack to go with that.

 

Has anyone changed and upgraded their clutch packs themselves ?? I am looking for some DIY instructions. Don't really like shipping the tranny to US to have it built so I want to see what I can do here locally or myself.
Anything else that should be changed as well for about 550 rwhp ?? clutch pucks, valvebody and big oil-cooler

 

You don't need big lines for AT fluid. It is very thin (relative to motor oil). 3/8" hose to the trans cooler works just fine. If you have to run hoses a long way, then you may want to upsize, otherwise, not needed.

 

Thanks rcdash, well right now I just have AN10 hose and connectors, so I guess I just go with that. So 3/8 sounds like maybe AN8, yeah that will save some money so sounds good
How about any DIY for clutch packs and tranny upgrades ??

 

I know it's a little late, but it could be the increased shear stress on the fluid at high RPM. Some numbers on a direct J-Matic replacement fluid:

Meets J
• JASO M315 Type 1-A

Suitable for use where the following fluid specifications are recommended:
• Honda ATF-Z1
• Mazda ATF M5
• Mitsubishi Diamond SP III
• Nissan Matic J
• Subaru ATF
• Toyota Type T IV


KEY PROPERTIES
Colour Red
Pour Point, °C -51
Viscosity, cP at -40°C 16,500
Viscosity, cSt at 40°C 36.9
Viscosity, cSt at 100°C 7.3
Viscosity Index 165

List of Redline's different ATF:
http://www.redlineoil.com/content/fi...PDS%201-10.pdf

Maybe you can try the high temp ATF as a sort of friction modifier.

 

^ I don't think so, at least not exactly. This appears to be a repeatable phenomenon related to viscosity perhaps but not shear stress as cool down increases the whp range a little bit. I think the pump may not be capable of generating the hydraulic force necessary at higher rpms. With a typical turbo kit where torque falls off at high rpm, there is no issue. Trying to maintain flat 500 wtq past 6k rpms is a problem... BUT as noted I've had the trans hold near 600 wtq in the midrange no problem.

 

it's more of an overall HP limit rather than a simple TQ limit.

 

In my case, changing out the fittings and going with larger lines made a significant decrease in temps.
I also switched out the stock pan for the PML pan at the same time, so that probably helped a bit.

What tranny fluid temps were you seeing at those power levels?

 

I guess I better do some tests when it is time to install, first I need to get some M14 1.5 to AN10 adapters

 

With the big cooler on the passenger side and 3/8" hose, 5AT temps rarely ever exceed 210 F on hot days, even repeated passes down the airstrip or uphill mountain runs.