I run big auxillary coolers on all my cars. The design sends hot transmission fluid to a radiator that is about 180 degrees to cool it. High pressure lines will not be held in place with a spring clamp and are usually threaded. Edited September 23, 2013 by hogwildmike. I'm in the energy industry, specifically natural gas and oil transmission and we use Swagelok fittings quite often as well. I miss my old cherokee.
Keep in mind that the typical hose sections of the transmission oil lines are rated for a burst pressure of roughly 1000 psi and a working pressure of only 250 - 500 psi. If they still read low, or if they are considerably far out of range, your transmission should be checked by a professional. Worse yet running the tranny fluid thru the radiator when the motor is warmed up after it goes thru the auxillary tranny cooler has just defeated the reason for the auxillary tranny cooler because now the tranny fluid is as warm as the antifreeze. It is imperative that you use the correct size fitment to avoid stripping the threads in the transmission line. It is better to strip threads from fitment while attaching the gauge hose rather than trying to attach the hose and fitment into the transmission port, and stripping those threads. Use this simple test to pinpoint the cause of your transmission's misery. I used new hoses for the upper and lower radiator feeds and 2 new hoses for the transmission cooler.
A lot of cars here will not move at -35 if you don't let them warm up a couple minutes at least. I have had no adverse problems with transmissions not shifting properly or premature tranny breakdowns. If it were mine I would flare it at the minumun for peace of mind. That makes sense since i've seen instances where guys have repaired the lines by simply cutting the hose, jamming the line into the hole, and tightening the piss out of one or two gear clamps. Thanks, Scott Gardner yes you can run a hose between the cooler lines, just use a piece of high pressure line.
He suggested that you run the transmission fluid through the radiator if you live in a cold climate. This should help with cooling issues with the motor. I put in the rebuilt tranny filled it up with fluid and found the leak as soon as I started the engine. But remember that doesn't apply as a blanket rule to all cars, and it's good that you thought to check. Testing the line pressure of your transmission is a very easy, relatively inexpensive process, and can save you from a very expensive transmission replacement if one is not needed. I ended up cutting the line and then runn a piece of fuel line on it with a pair of hose clamps.
So if the tube is good to 30000 kpa, so is the fitting. The pressure recorded is your pressure under wide open throttle. As are the guys that have hydraulic hoses made for their trucks as well. Myself and all my coworkers trust our lives to them. I only have regular jackstands - they go pretty high, but not like a lift or anything. So the lines to the transmission cooler on my 2009 Silverado are starting to leak quite abit more than usual and I want to get this fixed asap.
The motor only gets up to about 150 degrees here in Siberia. I believe these hoses are not under high pressure. I've had my 05 Silverado Crew-Cab 5. They have a threaded mandrel 'nut' that clamps the outer sheath of the hose into the fitting, so it can't pull out short of severe abuse - things like a motor mount shearing and the hose tries to hold the engine in the car. The threads can be stripped as well and this will lead to a very expensive repair. I just don't want to go to the other side of the spectrum and do an overly excessive fix on a system that won't ever see insane fluid conditions when in use. There is way to high a percentage of Reattas that have rebuilt trannys in them.
It stands to reason that if your cooling system runs hotter so will your transmission. For me to do the job correctly I need to know if that return fluid goes directly to the oil pan when it re-enters the transmission. The hose ratings should be printed on the side of the hose, and on the package. Tighten the connections where leaks are present and check the pressure reading again. . Cooler kits often come with similar hoses and clamps. The clamp is defnintly on over the bump in the fitting.
My Problem is getting the Tranny cooling lines reconnected. The transmission coolers themselves are only tested to a max pressure of 150 - 200 psi. Removing the transmission line testing port plug. A shuddering transmission can mean costly repairs so you'll want to diagnose it as soon as possible! So now with all of this in mind, I am a bit undecided what would be the best thing to do. Oh yeah, turn those caps off, it looks as if you are yelling at us.
Line pressure testing can help identify any one of these systems. All years had the transmission cooler built into the radiator. I also think I will look into the prom change to kick fans on sooner. I also heard the pre bent are not bent correctly but I have never used them. I may have to find a replacement.