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#1
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Tranny cooler working too well?
I have a 24,000 GVW B&M tranny cooler in my car and last night I noticed something strange.
It was about 12 degrees and I was driving along on the freeway at about 80MPH. The RPMs were reading about 3700. I believe that means that the torque converter wasn't locking up. This is the first winter with the cooler installed. Doug
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1992 LS Touring (6/91) - Currently undergoing a five speed swap Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip 1992 LS Touring (6/91) Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler 1994 LSi (4/93) Bordeaux Pearl; 198,000 miles; Mods: Weight reduction. 1969 Mustang GT Convertible 1970 Mustang Convertible 2000 Ford Excursion Sola lingua bona est lingua mortua. My Locker |
#2
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Re: Tranny cooler working too well?
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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 |
#3
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Wow.. 12.. It gets balmy down south!
that sounds like about what I notice when I have to jump on the highway before the car is heated up. Actually, I believe the car won't shift to 4th or engage the torque convertor until the tranny is heated up a bit (somebody correct me on this?), and 3700rpm sounds like maybe it was still in 3rd. Did the revs ever drop (how long were you on the freeway)? |
#4
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Re: Tranny cooler working too well?
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#5
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Y'all could throw a few bucks towards an in-line thermostat. Check out B&M, etc.
Beav |
#6
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Thermostat
Doug,
A thermostat will certainly help, it will stop the oil from being cooled too much, and then release oil to the cooler once past a certain temp. However, in colder weather, this will set up a "cycle". Once the cooler is open, it may have the ability to cool the tranny below lock-up temp again. My suggestion is simpler, use cable ties or wire to blank off a portion of the cooler fins using cardboard or something which will not soften for rain[assuming it is out front] Start with one third blanked, and go to a half if it does not lock up quickly enough. Get it right[one third maybe?] and you can leave it on all year round and forget about it. 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 |
#7
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Doug,
Repipe the ATF hose to split the ATF flow so part of the flow goes to the auiliary cooler and part goes to the original SVX radiator cooler/heater. Put a valve in the line to the original radiator cooler/heater. That way you can easily split the flow in cold winter and send it all to the aux. cooler in the summer. Good Luck. Larry III |
#8
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If slow warmup is a problem, a short stall test will bring the temp up ok. Harvey. (ps. Y'"all complain about the cold!. It's 102degs here and the bushfires are rageing.)
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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. |
#9
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Slow flow
Hi Harvey!
happy new year. I was presuming Doug has piped in the cooler in parallel, and original still in place. Most of my worries in the matter of extra coolers relates to what changes in flow rate and pressure are caused by putting extra pipes in, or indeed, restricting the pipes that are there. And of course it will be 102 degrees down under if you got people setting fire to the place! Keep safe, and I hope you and yours escape any damage. 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 |
#10
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my case
i've two little coolers installed in front of my radiator as the 'v'-shape. i don't know what GVW is. (it came with the car) there's not too much delay in shifting to 4th.(when is abt 35F). recently is about 13F, i noticed that the car took 1,2 mins longer to warm up. usually, i drove after a while, it'll shift to 4th naturally.
PS:it's indeed from the same family. weather's getting lower and cold as 12F, my 'brake light' sometimes couldn't go off and came on. eh, it's not a big deal. didn't pull the brake, back wheels didn't lock up.
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-SSSVX 92 LS-L TEAL since Aug '01 92 LS-L YELLOW since Mar '05 |
#11
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Let me back up here a little. Is there a negative side to this delayed shift into 4th? I know the engine RPMs will be up while driving highway speeds in 3rd (but not too much).
My question, though, is assuming you keep your speed reasonable during this time. |
#12
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Try: http://www.bmracing.com/noflash/prod...moControl.html Beav |
#13
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my car does this too.....
probably more annoying than damaging. inside five minutes the car begins shifting normally. honestly for me it is a little comforting because it means my cooler is doing its job.
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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!" |
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