Its function is to bypass the external cooler so that the transmission can come up to temp. In cold climates, without the bypass, it may keep the fluid too cool and the transmission would not work the way its designed to work.
Originally Posted by Ramsey
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
huuum
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
my experience with cold (and i mean damn cold here. it has been getting -45 during winter) even with stock coolers, winterfronts are almost a must have. obviously i dont have a problem with heat during winter. i say get the 40 and if you have a problem put a winterfront on it, and be happier with it when it gets warmer.
09 kawasaki teryx-monster sport
08 kx450f
08 mega lite toyhauler
04 ccsb 6.0
04 polaris 800 sled
00 polaris 800 sled
98 caravelle 209 br
96 trans am(black_lt1)
83 girlfriend
Below is part of the ad about the cooler.
"Here's how Low Pressure Drop (LPD) technology works to protect your transmission:
When Automatic Transmission Fluid (ATF) is cold it is viscous. The unique Tru-Cool design allows the colder, thicker ATF to flow more efficiently through two open bypass channels positioned at the top of the cooler.
As operating temperatures increase, the ATF becomes hotter and thinner. It's directed through the core where it is cooled.
Tru-Cool's highly efficient cooling technology combines improved protection against lube system failure with optimal heat transfer. "
That is built in the cooler. Tryed to find a pic. on the web to show you.
Tru Cool allso has an external bypass --one that looks like a " H " you plumb in the lines going to-from the cooler.
Hope this helps
Last edited by metalchips; 04-28-2009 at 05:30 PM.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
I found the box--took a pic--of the internal bypass.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
Thanks
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
Glad to help.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
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