Never use your cooler lines to remove fluid from your transmission by starting the engine or in and attempt to flush by catching fluid in a pan while adding fluid to the dipstick. Anything thats in your cooler or lines will end up in your Valve Body, Bushings and Planets. The fluid coming from the Pump or converter does not and any debris from these will certainly end up in the cooler. Fuel line will not work and will break down in Transmission fluid. Generally the transmission will run cooler this way and additionally this may take some of the load off the radiators job of cooling the engine. Here are some hints. Never over tighten clamps to the point of the rubber oozing through or being cut this will cause a failure too.

The cooler itself is a restriction of flow and this restriction while not a problem for the cooling or lube to the trans can cause excessive pressure inside the converter. Always use line thats at least as large as the inlets in the cooler, Avoid extreme twist or turns in them particularly with rubber lines. When installing rubber cooler lines to metal lines its a good idea to put a small flair at the end of the metal line. If you must place the cooler in and area with little air flow a FAN is a must. From my experience and expensive brand name or a generic unit appear to do the same job. I once had a car where the transmission temps would sky rocket when the car was being run hard and couldnt understand why. I did a test once with two coolers in parallel one round tube and one flat with a laser thermometer to determine this. Not too big because you will tear the line on the inside during install. This would super heat the fluid when the headers got hot.

Temp sending units- The best place for these is in the pan since that will give the best average temperature which is whats important, using the pressure port is ok however you will show temps 10 to 20 degrees higher average than you would in the pan. Always be sure that the metal lines coming from the Transmission under car do not contact the headers or exhaust. A stopped up or severely restricted cooler or cooler lines can do the same. I have found the stacked plate (Flat tube) Types when measured inlet to outlet temp drop tend to be more efficient in the same dimensional sizes with a greater temperature drop.

I after some looking around found that the cooler lines in and out were pinned against the headers. When Installing coolers make sure lines are clear of anything that can rub them and always use line thats approved for transmission/hydraulic fluid. This will assure adequate cooling while reducing the wear to the engine thrust bearing. Type and brands of coolers; I really have no preference here as far as brand. This can force the converter against the flex plate more so than normal and cause wear to the engine thrust bearing.

Also roughening up the outer surface of the metal line with very coarse sand paper in area ceramic chemical pumps where clamp will ride will help assure a good seal and reduce the possibility of blow off. I do not suggest placing temp senders in either the inlet or outlet from the cooler as they will increase cooler restriction and increase the odds of a leak.Many of you add aftermarket coolers to your cars and this is allways a good idea. A can of cooler flush which most transmission shops and or transmission parts suppliers should have followed by a blow out with air is the correct way to do it. Allways mount the cooler in a place that has good air flow and if mounting in front of the radiator always make sure the fin's in the cooler are parallel with the fin's in the radiator to avoid restricting air flow to the radiator. When this is done no lube is being sent to the planets and bushings and they can go dry and melt down very quickly destroying or significantly shortening the life of your transmission. Whats TOO HOT? Well ideally you want you average temp to stay under 190 degrees however I would not get to concerned till the temps get at and or over 230 degrees. Moved them away and the problem was solved, So always keep trans cooler lines factory or otherwise as far away from the exhaust as possible. When hooking up multiple coolers several things should be noted. Heat can damage a trans but with the exception of extreme heat 250 or higher this damage is a long term killer by breaking down fluid and causing rubber seals to harden and break. Where a Transmission internal failure is unlikely to put debris in the cooler since all fluid coming from transmission must travel through the trans filter. A cooler cannot be properly cleaned simply by blowing air through it. So when installing more than one cooler its advised to put them in parallel with each other, This means one line from the trans is split with a Y and one line run to each cooler then out of each and into a Y back to a single line running to the trans.

Posted by: ceramicacids2018 at 08:16 AM | No Comments | Add Comment
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