Transmission cooler system for all seasons

[injuhneer]

On another note; I have read mention of an external AT filter that was fitted to later cars.

When did that begin and where is that external filter mounted if it has been retrofitted?

-Mike O

[svxcess]

The ATK-50 campaign, as it was called, only affected certain 1992 SVX's

http://members.tripod.com/quick_svx/.../42748095.html

The filter was mounted on the driver's side below the battery tray.

After they removed the ATF mesh screen from the cooler inside the radiator and other upgrades, the filter was not installed in later years.

It may still be available from Subaru

31099AA370....Use 31099AA031
$12.35




.

[injuhneer]

Originally Posted by svxcess

The ATK-50 campaign, as it was called, only affected certain 1992 SVX's

The filter was mounted on the driver's side below the battery tray.

After they removed the ATF mesh screen from the cooler inside the radiator and other upgrades, the filter was not installed in later years.

It may still be available from Subaru

31099AA370....Use 31099AA031
$12.35

.

Thanks. I was curious about the location. My car doesn't have it (built 12/93) so I'll go about my business of doing this cooler install.

If I did add a filter it would be a spin on for a motorcycle. Honda and Yamaha both have filters with very small particulate filtering compared to most auto filters. I will be doing a flush on the AT this week in prep for the cooler install so maybe I'll send the fluid off to Blackstone to see what's what then decide about the filter.

-Mike O

[oab_au]

Originally Posted by injuhneer

Thanks. I was curious about the location. My car doesn't have it (built 12/93) so I'll go about my business of doing this cooler install.

If I did add a filter it would be a spin on for a motorcycle. Honda and Yamaha both have filters with very small particulate filtering compared to most auto filters. I will be doing a flush on the AT this week in prep for the cooler install so maybe I'll send the fluid off to Blackstone to see what's what then decide about the filter.

-Mike O

Mike there is very little pressure in the cooling circuit, about 10psi, so a fine filter will restrict the flow a lot.
The campaign filter was just a strainer.

Harvey.

[dbarnblatt]

Originally Posted by oab_au

Mike there is very little pressure in the cooling circuit, about 10psi, so a fine filter will restrict the flow a lot.
The campaign filter was just a strainer.

Harvey.

Is the campaign filter kit any benefit? Meaning would it be a good addition to any years SVX, or is it only for those early in the production? Would it be good to add this to a 1997 or 1996 SVX.

I happen to have one of these kits with all hoses and brackets new in the box that I acquired with a bunch of other parts.

[oab_au]

Originally Posted by dbarnblatt

Is the campaign filter kit any benefit? Meaning would it be a good addition to any years SVX, or is it only for those early in the production? Would it be good to add this to a 1997 or 1996 SVX.

I happen to have one of these kits with all hoses and brackets new in the box that I acquired with a bunch of other parts.

It wouldn't hurt to put it on, but it is not needed.
They were only to trap, the lock-up clutch lining peices, that come off the early clutches.

Harvey.

[injuhneer]

Originally Posted by oab_au

Mike there is very little pressure in the cooling circuit, about 10psi, so a fine filter will restrict the flow a lot.
The campaign filter was just a strainer.

Harvey.

Good point. The idea is unqualified at this point. The filter I have in mind is from a low pressure system. I suppose my only concern would be the bypass and it's activation pressure.

Alternately a full flow filter from a hydraulic application would work nicely. Lots of heavy equipment and aircraft hydraulic filters available but that defeats the purpose of being able to go to a FLAPS or bike shop to get a filter.

Maybe I should combined the two and use a cartridge filter in a finned canister to double as a cooler.

-Mike O

[processengr]

Originally Posted by oab_au

Mike there is very little pressure in the cooling circuit, about 10psi, so a fine filter will restrict the flow a lot.
The campaign filter was just a strainer.

Harvey.

Hi Harvey!
Do you feel the add on ATF filters such as the Perma-cool which use a large oil filter have too much restriction?

[injuhneer]

Originally Posted by processengr

Hi Harvey!
Do you feel the add on ATF filters such as the Perma-cool which use a large oil filter have too much restriction?

It really comes down to flow (volume) at a given pressure.

The fluid flow can be calculated for the external components. As long as the filter exceeds the needed flow volume it won't impair the fluid.

-Mike O

[oab_au]

This cooler flow is not huge, fast or high pressure. It is the flow from the torque converter's regulated flow. As this is where all the heat is produced, so it goes to the cooler. From there it goes back to the box to feed into the main-shaft to cool and lube the gear sets and bearings.

You could use a strainer filter, if you want as long as it has adequate flow. The box manufactures fit a strainer on the pump pick-up, so they must think that this is all that is needed. The later box use another spin-on filter, but I don't know what type, or where it is situated in the flow circuit.

Harvey.

[injuhneer]

Originally Posted by oab_au

This cooler flow is not huge, fast or high pressure. It is the flow from the torque converter's regulated flow. As this is where all the heat is produced, so it goes to the cooler. From there it goes back to the box to feed into the main-shaft to cool and lube the gear sets and bearings.

SNIP

Harvey.

That being the case I may reconsider the oil-oil exchanger. I need to figure the heat transfer.

Do you know the average operating temp of the ATF in these 4EATs?

Maybe install a temp probe and take some data.

-Mike O

[processengr]

Originally Posted by injuhneer

That being the case I may reconsider the oil-oil exchanger. I need to figure the heat transfer.

Do you know the average operating temp of the ATF in these 4EATs?

Maybe install a temp probe and take some data.

-Mike O

I monitored the temp in our Silver 92 about a month ago, using laptop, jecscan, evoscan cable to SSM1 diagnostic port...
This was on a 26 mile run to work, involving hills and highway...outside temp was 68F. Bypassing the radiator cooler, using hayden plate cooler (without internal orificing for temperature control) installed in wing, 8" pull through SPA fan, 180F switch.
Average was 194F, went to 204F speeding up long 10% grade.
I'll post a pix if I can...

[injuhneer]

Originally Posted by processengr

I monitored the temp in our Silver 92 about a month ago, using laptop, jecscan, evoscan cable to SSM1 diagnostic port...
This was on a 26 mile run to work, involving hills and highway...outside temp was 68F. Bypassing the radiator cooler, using hayden plate cooler (without internal orificing for temperature control) installed in wing, 8" pull through SPA fan, 180F switch.
Average was 194F, went to 204F speeding up long 10% grade.
I'll post a pix if I can...

Nice. That is exactly the kind of data I am interested in. That was from the regular sensor on the trans, correct?

Do you have a photo you would be willing to share of your Hayden cooler install?

-Mike O

[processengr]

I am sure I have a photo somewhere...cooler specs:
- Manufacturer: Hayden - Manufacturer Part: 1678 - Brief: 7-3/4" x 11" x 3/4" - 22k GVW Description Special Internet Pricing Only Hayden Transaver Plus Trans-Cooler - 22,000 LBS. GVW - Heavy Duty Driving, heavy duty towing pick-up trucks with 5000 lbs. towing. Class "C" motor homes, travel trailers to 24 ft. Hayden Transaver Plus coolers provide: Exclusive Hayden OE design plate and fin design for low pressure drop and extra cooling at low speeds Pressure tested at 150 psi Hayden Transaver Plus Cooler includes: Oil Cooler Hose Fittings and Hardware Steel Mounting Hardware to keep your hot rod or classic car looking great Installation Instructions (no special tools required)

[Tapani]

Just a quick note - cruising at around 50-60 MPH with the ambient -5 C, the TCC will engage and release every 5 miles or so..... i.e. cycling on and off.... does anyone else experience this? The trans cooling is stock 1992 US Spec - no external filter installed (1996 JDM VTD tranny and firmware, though).

I trust this is due to "too much cooling" effect, eh?

Tapani