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Old 07-10-2003, 04:45 PM   #1
d4d4d4d4
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Location: seattle WA
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1990 legacy wgn
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Talking Idea for making AWD 4EAT shift smoother!

I've noticed that the 4EAT doesn't warm up very easily given that such a small engine (mine is a 1990 EJ22, I would imagine the ej18 is worse) doesn't put out enough heat to keep the AWD transmission fluid loose. In driving temperatures below 60 f the transmission has problems making smooth shifts without extra carress from my part. It can be very picky about shifting in different RPM ranges, load weight, going up or down hill. No matter what the temp is outside, if I drive around in 2nd running the engine at 3k-4k for several miles, it warms the 4EAT enough so that it shifts smoothly no matter what situation I give it.


To fix this problem without high reving, I've ordered a rectangular sheet of steel from a freind. He's going to cut and bend the sheet so that it work as a skid plate. I'm making it go from the front fender under the engine and back to just beyond the AT fluid control box. Hopefully the reduced air flow will hold in heat. This should be pretty effective in maintaining a warmer opperating temp for the AT fluid control box. I'll tell you how it works out when I get it done. Until then.... Any ideas I haven't thought of??
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Old 07-10-2003, 06:47 PM   #2
Legacy777
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It'll also improve the areodynamics of the underbody too
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Old 07-10-2003, 06:54 PM   #3
ciper
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I suggest blocking of the left most portion of the radiator. The transmission "cooler" also acts as a transmission heater, bringing the temperature of the fluid up. The radiator fans and thermostat will help to balance the temperature.
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Old 07-11-2003, 12:55 AM   #4
d4d4d4d4
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I never thought about areodynamics underneath the automobile. I wonder how much this will effect my gas milage if the sheet is thin enough? Only one way to know for sure! The engine could be double layered and I could use ultra thin steel from the engine back. Since I go offroad often I would like to protect my oil pan. You guys know how strong the bottom of the tranny is? Would it even help at all to put extra metal over it?
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Old 07-11-2003, 11:10 AM   #5
Legacy777
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The big thing it helps is drag. All the protruding parts catch the air and add more drag, compare that with a flat sheet of metal, the flat sheet will will produce less drag.
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Old 07-12-2003, 02:42 PM   #6
rhdude
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Get some B&M trick shift, use a 50/50 mix of that and Mobil 1 synthetic... tranny shifts smooth as butter, even when cold
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Old 07-12-2003, 02:44 PM   #7
rhdude
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Quote:
Originally posted by d4d4d4d4
You guys know how strong the bottom of the tranny is? Would it even help at all to put extra metal over it?

the tranny pan can be easily dented by a nice rock or even clump of hard dirt... as for the actual tranny itself...


Isn't that strong...

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