Transmission cooler install....
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Joined: Aug 2003
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From: Houston, TX
Transmission cooler install....
Having finally decided to bite the bullet and install a cooler for my tranny on a 91 Ext 3.0. Initial thought was to run the fluid first through the cooler and then through the radiator. My thoughts were to send cooler fluid to the radiator and that way kill two birds with one stone....cooler tranny and cooler engine. Then talked to a couple of mechanics and they suggested to only use the new cooler and completely bypass the factory one in the radiator. Supposed results: tranny runs cooler and so does the engine....anyone with any thoughts on this?????
Thanks,
Klaus Cook
Houston, Texas
Thanks,
Klaus Cook
Houston, Texas
Last edited by cookkd; Oct 4, 2005 at 11:37 AM.
Elder User
Joined: Jul 2005
Posts: 560
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From: Houston,TX
your mechanics are right. chances are after being cooled out front in the fresh air, fluid will likely be reheated by running back through the rad. it will negate the benifits of the tranny cooler you just spent cash and time to install. if you do want to run through the rad, just go from the trans to the rad then the cooler letting that nice cool fluid flow directly back to the trans.
Post Fiend
Joined: Apr 2005
Posts: 5,720
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From: Washington state
best to bypass cooler in radiator, too many high mileage radiator tranny coolers develop leaks and leak antifreeze coolant into tranny, sudden death and total tranny rebuild, expensive.
go to at least an 11"x11" plate and fin cooler in front of radiator with an inline filter added.
both the A4 and 4R series trannys have an internal thermostat bypass valve that shuts off tranny fluid flow to external coolers until fluid reachs operating temp, abt 150-160d F.
go to at least an 11"x11" plate and fin cooler in front of radiator with an inline filter added.
both the A4 and 4R series trannys have an internal thermostat bypass valve that shuts off tranny fluid flow to external coolers until fluid reachs operating temp, abt 150-160d F.
Last edited by 96_4wdr; Oct 4, 2005 at 01:47 PM.
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