Engine/Transmission Cooling
Thread Starter
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Elder User
Joined: Aug 2003
Posts: 624
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From: Houston, TX
Engine/Transmission Cooling
I'm having my tranny pulled next week to replace the front and rear transmission seal. Once that is done, I want to add a transmission fluid cooler. I also want to get rid of the stock engine cooling fan and replace it with an electric unit. Can anyone recommend a transmission cooler and an electric cooling fan?
Thanks,
Klaus Cook
Houston, Texas
Thanks,
Klaus Cook
Houston, Texas
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
PartsAmerica has a wide selection for Aero with pictures, sizes and fan speeds.
http://www.partsamerica.com/
Bulk Transmission Parts has a wide selection and best prices I've found for tranny aux coolers. get a plate and fin type rather than tube and fin, better fluid flow rate-important and more cooling efficiency. largest size that will fit in front of a/c condenser radiator.
http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=2&Category_Cod e=coolers
keep list posted please, I am interested in replacing the viscous clutch fan on mine with electric fan type.
http://www.partsamerica.com/
Bulk Transmission Parts has a wide selection and best prices I've found for tranny aux coolers. get a plate and fin type rather than tube and fin, better fluid flow rate-important and more cooling efficiency. largest size that will fit in front of a/c condenser radiator.
http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=2&Category_Cod e=coolers
keep list posted please, I am interested in replacing the viscous clutch fan on mine with electric fan type.
Freshman User
Joined: Nov 2004
Posts: 41
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As far as an electric fan goes, if your willing to shell out for it, Flex-a-lite makes a fan for bronco II's and rangers that looks like it'd fit perfectly. I ordered it earlier this week and haven't gotten it yet, but it's better than the current electric fan I have.
store.summitracing.com/default.asp?target=partdetail.asp&part=flx-40
copy and paste..
The current fan I have in now is the same depth and leaves about an inch or so between the motor and the water pump pulley. Also, the radiators in any given ranger/bronco II is the same height as the rad in our aerostars. The fan I have now pulls 1400cfm and when I'm sitting in traffic on a 90 degree day, the temp starts to creep. This fan is rated at 1950cfm, I think I'll be able to run the A/C now, even in traffic, with this much air.
I'll give ya an update on it when I get it and put it in (hopefully monday) if ya want.
store.summitracing.com/default.asp?target=partdetail.asp&part=flx-40
copy and paste..
The current fan I have in now is the same depth and leaves about an inch or so between the motor and the water pump pulley. Also, the radiators in any given ranger/bronco II is the same height as the rad in our aerostars. The fan I have now pulls 1400cfm and when I'm sitting in traffic on a 90 degree day, the temp starts to creep. This fan is rated at 1950cfm, I think I'll be able to run the A/C now, even in traffic, with this much air.
I'll give ya an update on it when I get it and put it in (hopefully monday) if ya want.
Thread Starter
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Elder User
Joined: Aug 2003
Posts: 624
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From: Houston, TX
My cooling system works fine, the only problem is a sticking thermostat. I want to go to the electric fan to take that fan load of the engine and to run it a little cooler. We also are having temps between 95 and 100 currently and sometimes my temp gauge moves to the high end of normal, especially when sitting in a backup on the frwy or at a lite.
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
Get your radiator flushed, and replace the thermostat. Electric cooling fans do not really take the load off the engine, they just transfer the load through the alternator, and place additional load on the electric system. While most vehicles can easily handle the additional load, keep this in mind. What I suggest is installing an electric fan in addition to your existing fan. Have the electric fan kick on at a higher temperature than your normal fan does, this way, if the temp starts to rise, you will get added cooling when you need it.
Post Fiend
Joined: Jan 2000
Posts: 5,860
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From: Metro Detroit (Redford)
Since the Aerostar is prone to excessive heat, I highly recommend you fill that tranny with Redline D4 synthetic ATF.
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Former ******
Joined: Nov 2004
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From: Salt Lake City, Utah
REdline sounds excessive, and what makes the Aerostar more prone to excessive heat than any other vehicle? I recommend a tranny cooler, since not even the most expensive tranny fuild is going to reduce heat.
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Post Fiend
Joined: Apr 2005
Posts: 5,720
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From: Washington state
syn. ATF does reduce tranny operatine temp and thus engine temp by reducing friction, auto trannys by their nature; torque converter, friction bands, fluid pump, planetary gears, produce far more heat than a manual in same application, does not shear out as badly as dino fat oil, less shearing=less friction. auto trannys waste about 10% of horsepower in as friction and heat.
Aero's especially with air cond., 4L, auto tranny and AWD are the Space Shuttle version of vans as far as the design of the cooling air flow around the propulsion package.
Take your shoes off on a 90+ day and put the bare feet on the firewall angled surface while pulling a long hill.
I am interested in finding out if the alternator will stand up to the high 15-20 amp contiuous draw during hot weather from a radiator electric fan cooling system and what cfm electric fan is required.
Aero's especially with air cond., 4L, auto tranny and AWD are the Space Shuttle version of vans as far as the design of the cooling air flow around the propulsion package.
Take your shoes off on a 90+ day and put the bare feet on the firewall angled surface while pulling a long hill.
I am interested in finding out if the alternator will stand up to the high 15-20 amp contiuous draw during hot weather from a radiator electric fan cooling system and what cfm electric fan is required.
Post Fiend
Joined: Jan 2000
Posts: 5,860
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From: Metro Detroit (Redford)
I don't think Redline is excessive in the tranny, rear end, or power steering, if it meets spec for the application. In all three cases, the fluid is in for a long time, so the cost of the Redline is minimal. Redline in the crankcase of the engine would be excessive.
Posting Guru
Joined: Jun 1999
Posts: 1,642
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From: Northern California
Also, my $.02, in many cases. A transmission that is running "HOT" can and will cause a normally running engine to run either noticeably "HOT" or even overheat. Many overheating engines, especially in long driving times, hill climbing, stop and go traffic, in high 90 degree + high humidity summer weather, is not the fault of the engine. It's source is a running hot a4LD transmission! Hence, a proper AT cooler, and especially synthetic auto trans fluid, is well worth the added cost. Especially, the ATF, synthetic fluid just might be the ticket for keeping your Aerostar from running hotter than usual, or even overheating. Also, if you notice your coolant boiling and bubbling in the platic overflow container during it's shut down "heat soak" time (from 1-10 minutes immediately after shutting your Aerostar off, from a long freeway drive, towing, or stop and go driving on a scorcher hot afternoon) this usually is a sign you might have a small radiator blockage for coolant flow, or a thermostat not opening fully. Regardless, a full cooling system flush is in order.
Post Fiend
Joined: Apr 2005
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From: Washington state
if money is not a limiting factor, then the French Motul lubricants are the best on the world retail market. they manuf. the lubricants for the European, Russian and Chinese space programs and many of commercial jet engines in worldwide service.
Former ******
Joined: Nov 2004
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From: Salt Lake City, Utah
I think a tranny cooler is still the way to go here, regardless of fluids. And yes, higher grade fluids are the way to go, but they won't save you under an extremely heavy load, and if it does get hot, the better fluids can't protect the seals and other parts that may be stressed to their limits.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
Originally Posted by khantyranitar
I think a tranny cooler is still the way to go here, regardless of fluids. And yes, higher grade fluids are the way to go, but they won't save you under an extremely heavy load, and if it does get hot, the better fluids can't protect the seals and other parts that may be stressed to their limits.
put it in the return tube tranny line, last cooler before tranny in hot climate where min. winter temps are +20d F.
put in line to radiator tank if in cold winter climate areas with min temps below +20d F. Or buy one of the thermostat plate types such as Tru-Cool (tm).
Last edited by 96_4wdr; Aug 11, 2005 at 01:40 PM.