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#1
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Fyi
From the Hayden Trans cooler website FAQ:
Q. Can you over cool the transmission fluid? A. Transmissions are not highly sensitive to cool operating temperatures. However, in sub-zero (20-30° F) weather conditions transmission fluid can actually gel up in an external cooler and cease to flow, causing damage. Use of the radiator cooler actually helps warm the fluid under these conditions. It is critical in extreme cold conditions to use the original equipment cooler in series with the auxiliary cooler and allow the vehicle to warm up before driving. Just food for thought Beav |
#2
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Re: Fyi
Quote:
-Mike |
#3
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Supercooled tranny
Putting them in series does obviously make sense in this very cold climate context. Most of us being used to overheating trannies, we tend to think of the matrix in the radiator as a cooler. It is in fact a liquid/liquid heat exchanger. When the air temp is v. low, the oil is kept warmed to the temp of the engine coolant in the rad.
However, this does not take into account that all the older SVX radiators, I am talking '92 to '94 here, but correct me please if I am wrong, have a 'turbolator' at the oil inlet. This is meant to cause turbulent flow and increase the efficiency of heat transfer. Unfortunately, it also gets clogged with gunge and debris from the tranny, and reduces flow through the matrix, and so has the opposite effect. Putting an additional cooler in line or in series with one that is causing reduced flow does not seem a sensible option to me. However, if you run your car in very cold temperatures, you should consider a series setup if installing an extra cooler. But don't connect it in until you have had the agent conduct a flow test after the rad cooler to ensure you have not got a clogged or badly restricted OEM cooler. Remember, you will get the same low temperature heating effect by fitting the additional[in parallel] cooler sandwiched between the rad and the air-con matrix, plus you will ensure that clogging of the 'turbolator' at some future time will not cook your tranny. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#4
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Re: Fyi
Quote:
I would think, especially in the SVX's case, that parallel would be the better path to take (in the 92 anyway), with the 92's propensity for clogging up the stock cooler. If you're in series, you risk a "no path" problem if the stock cooler clogs, whereas, in parallel, you at least have a pathway around the clogged stock unit. Some say flow rate is affected by the parallel path, but, others say it is negligible and should not be a detriment. Just wondering.
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Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI |
#5
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for me the risk of my tranny fluid geling...
is one that i am willing to take. i live in memphis and it is almost never below zero here. in the winter we average around 40 degrees. the problem here is heat and clogging. an extra tranny cooler that runs parallel to stock works for me. i took that a step further and said to hell with the stock cooler. i run b&m only. i simply keep it maintenanced. i have no worries.
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1994 SVX, true dual Magnaflow exhaust, K&N filter, 17" Enkei RS6 wheels, Bridgestone Potenza RE730 225/45/17 rubber, zinc plated cross-drilled rotors with yellow painted brake calipers. B&M tranny cooler rated at 19,000 GVW. GC springs and Koni strut inserts installed and the car is lowered two inches all the way around!! "Too much fun to drive!" |
#6
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My mech also said the same thing, when mine was installed. He also said that the tranny will not shift into 4th untill the tranny fluid gets to temp.
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