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Old 07-19-2017, 04:09 PM   #261
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Join Date: May 2009
Location: Columbus Ohio
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Year: 1991
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Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
im using the built in radiator loop cooler.. and so far the new 1000 runs lots cooler than the 545 did..

the program im running in my TCM keeps the converter locked pretty much all the time so it seems not to make much heat..

CAC and I dont see eye to eye on locked converter in 2nd gear.. I want it locked partially through 3rd and then all the way up.. they lock it going into 2nd..

thus far even in the hot heat and me driving it on the freeway i havent seen it go above 194.. and im running transynd synthetic fluid which is good up to a much higher heat than regular fluid.. transynd isnt cheap but every allison person I talked to said thats what should be used.. and for what the $$$ transmission, a little extra in fluid didnt hurt..
-Christopher
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Old 07-19-2017, 04:35 PM   #262
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The thing you were using is called a fin comb, usually used to straighten out bent fins on the coil
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Old 07-19-2017, 04:52 PM   #263
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yeah and i used it very gently so i didnt straighten the squiggly fins.. just to get me started peeling the dirt off...
-Christopher
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Old 07-19-2017, 04:52 PM   #264
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Nothing on my rad to tie into but glad to hear yours is running cool. And ditto the TranSynd. That is what's in mine. Way out in front of conventional fluids based on what I have read. But I still want some extra heat relief so I guess it will be an aftermarket rig with a fan. I will probably have to hang it somewhere under the bus so I'm thinking that having the fan blowing straight down might help slow the build up of crud on the fins. Might ought to wait until my CAC/Rad package arrives (hopefully Friday) and see if there is any room left up front.

Also need to check what size lines come off the tranny before ordering anyway.
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Old 07-19-2017, 05:12 PM   #265
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my 1000 with SAE3 bell has #12 O-ring Boss fittings on it.. the normal for GM bell is #10 O-ring boss..

are hou using an SAE3 bell to your 4BT?

I used a fitting that took the #12 ORB down to a #10 flare so i could use the radiator trans cooler.. #12 is overkill for what we are doing with these transmissions.. the cooler fittings are in the bell so im guessing allison uses that bell on multiple models..

-Christopher
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Old 07-19-2017, 06:19 PM   #266
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The bell is an SAE3 but I haven't even taken a look at the fittings yet. Need to crawl under and take a peek but it's tricky trying to guess hydro fittings. I might out to contact Allison to see what it came with.
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Old 07-19-2017, 08:08 PM   #267
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Join Date: May 2009
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you probably have the same fittings as I do.. according to CAC, the SAE3 bell for 1000 / 2000 are the same thing.

I know one thing it sure is nice to have lockup.. it was 96 degrees eventually here today and I ran the bus on the freeway.. the only time I ever saw my engine temp hit 206 was only because the fan was not running.. and it reaches 205 / 206 and turns on the fan.. and would get all the way back to 195 and shut off... that NEVER happened with my AT545.. with that trans i wouldve been running 210-215 with my fan on continuously.. and my oil temp wouldve been 216-218.. today my oil temp was 196 - 202.. never higher..

my cooling problem appears to be SOLVED!!
-Christopher
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Old 07-19-2017, 10:30 PM   #268
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My at545 has cooling lines out the top. Can not see them from below, at least not easily.

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Old 07-20-2017, 12:51 AM   #269
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Based on what I am seeing online, the 1000 & 2000 have the in & out lines at the front on the passenger side on bottom, right across from the external filter.
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Old 07-20-2017, 04:41 AM   #270
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Correct, the 545 has the lines on top as #10 o ring boss, my 1000 has them on bottom as #12 as tango describes. Next to filter.

The filter on a 545 is an external setup going in series with the cooler lines.

On the 1000 the spin on filter port is part of the bell.
Christopher
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