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#16
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Re: Have had tranny cooler for over a year...
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but, if a customer wants something done a particular way, and its not an obvious problem I will defer to their wishes.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#17
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Re: Have had tranny cooler for over a year...
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The cooler circuit is only from the Torque Converter, where 90% of the heat is generated, to the cooler then back to the mainshaft, to cool and lubricate the gear train, and I can assure you that the drillings and passages in the mainshaft have more resistance, than the flow through the water cooler, has. Quote:
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#18
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Re: Have had tranny cooler for over a year...
Harvey,
This is where is gets ambiguous or down right maddening. You say the restriction in the radiator cooler is not relevant but others on here, including some well respected folks like yourself, have said that the restriction in the radiator cooler is excessive. <---That's me screaming On the high gearing, I have taken the advice and drive in 3rd around town or, really, at any speed below 60MPH/100KPH. But I will admit that the statement you made about the torque converter generating more heat because of the high gearing is a little confusing, given the picture I have in my mind on how it is working. I can see that being true if the high gearing causes low efficiency but it isn't clear to me yet why that would be the case. I can see why engine torque level would be higher to get a given HP output at the lower RPMs but it isn't obvious how the high engine torque, or high gearing in general, would hurt efficiency. However, I like that the water pump runs harder at the higher RPMs of 3rd gear and keeps the engine cooler during city driving. So I always figured there was at least that benefit if not the additional potential benefit to the tranny. Once the tranny starts failing, I can certainly believe any tranny will start running hotter and start a downward spiral. I'm just not seeing how a perfectly good tranny would necessarily run hot. Some people have even said that this tranny is actually a well designed one, if not abused and well maintained. Lots of conflicting messages........ For those who are interested in testing your used ATF or engine oil, I have been told that polarislabs.com is the most reliable and also reasonably priced. For example, for $28 you can get the following data for engine oil: Elemental Metals by ICP (will tell you about contamination from say, a dirty air filter, wear and leaching) Water % by Crackle or FTIR Viscosity @ 100C (ASTM D445) (will tell you how badly your oil is being sheared) Fuel Dilution % by FTIR Soot % by FTIR Total Base Number (ASTM D4739) (will tell you if you changed your oil too soon, too late or about on time) Oxidation/Nitration So there will be no guessing. You will know if the oil is a good match for your engine/tranny and if you should be changing it sooner or later than you did for this test.
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#19
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Re: Have had tranny cooler for over a year...
my trans is newly rebuilt and never sees high temps except in the mountains. i have monitored the trans temp using an infrared thermometer on the trans pan. before the cooler it would run about engine temp but above 200 in the mountains. after installing the cooler it runs about engine temp but below 200 in the mountains. it really didn't change the temperature much during regular driving (hooked in series with radiator cooler/warmer). of note is that the engine also runs cooler in the mountains, it never got hot but would run above 1/2 which it doesn't do anymore.
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#20
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Re: Have had tranny cooler for over a year...
My car ran out of tranny oil while driving at 120kmph because one of the hoses that goes to the radiator cooler went broken. Now, with new syntetic oil again, 3rd and 4th slip like if the car goes to neutral. it feels like in Power all the time. Some transmission shop recomends "Lucas" to reduce slip but it did not work. I wonder what happen if the transmission oil becomes too thick? or if I replace the ATF by engine oil SAE30? Does someone have any idea of what could went wrong on my transmission? any ideas?
Jose Carlos. |
#21
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Re: Have had tranny cooler for over a year...
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#22
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Re: Have had tranny cooler for over a year...
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It's not just a river in Egypt, yaknow.
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2009 Volvo C70 T5 2008 Volvo S80 V8 2006 Range Rover Sport 2001 Audi S8 |
#23
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Re: Have had tranny cooler for over a year...
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What would you recomend to clean the engine and the engine bay once the motor is out? I normally use diesel mixed 50-50% with gasoline... with compressed air. btw, what doest jaknow means? Thanks nate. Your straight answer. Last edited by THE NEW GUY; 01-31-2012 at 06:51 AM. |
#24
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Re: Have had tranny cooler for over a year...
Denial ( the Nile ) is not just. A river in Egypt . YaKnow ( you know)
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#25
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Re: Have had tranny cooler for over a year...
i use dish soap to clean an engine and empty engine bay. you risk messing things up cosmetically if you use diesel/gas, not to mention it's not too safe.
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#26
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Re: Have had tranny cooler for over a year...
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The top gear overall ratio of your SVX is 2.4:1, the converter can lower that ratio to 4.6:1 at stall. So every time you push the throttle at low speed in D, the converter will lower the ratio and produce a proportional amount of heat. The more this is done, like in heavy traffic the hotter the ATF becomes, if it is in hot weather, the ATF gets even hotter. This is where the extra air cooler will help to lower the oil temp. Quote:
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__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#27
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Re: Have had tranny cooler for over a year...
@ SVX files. How on earth do you manage to stay awake for 27 hours at 60 mph? Hats off to you.
Just to throw my amateur opinion in here, in the UK we don't experience high temperatures that often. My SVX, left in 'D' at WOT changes gear with uncanny smoothness. It makes me suspicious because there must be some heavy clutch slipping involved to enable this IMO. My XJ8 also changes as smoothly but has more gears and lower final drive ratio and therefore seems happy. In my bike experience clutch temperature causes swelling and the increase of free play at the lever, therefore it drags. Presumably, when an SVX high gear clutch suffers the same fate the operating system can't accommodate this expansion and compounds the problem, leading to failure. I reckon that any sort of cooler won't stop this happening, or rather won't cool it fast enough. Driving the old girl in 3 till 80mph has worked for me so far, and the added engine braking inspires confidence. Plus the motor usually isn't far off it's magical 4500rpm+ transformation which is handy for overtaking/fun. |
#28
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Re: Have had tranny cooler for over a year...
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Left on Sunday around 3:00 PM Texas time. Spent a short night is the nastiest hotel that I have ever been in in Arkansas. Stopped out of my way on Monday night at my brother Marks place in Cincinatti Ohio. And got home dead tired on Tuesday. Yea, I'm old.
__________________
www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
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