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Old 04-21-2010, 04:45 PM   #1 (permalink)
rieker69
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Allison Transmission Temp

Just curious what my temp should run at. I have a 02 8.1 with the Allison. Towed my 18 ft boat Sunday and it ran at 200. Not sure what it will do with my enclosed car trailer. Fluid was just flushed as well. Is this ok? What is safe operating temp? Would like to add a deep pan, just not affordable right now.
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Old 04-21-2010, 05:44 PM   #2 (permalink)
7902sc
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Check fluid level, too high they will run warm? make sure has allison spin on filter,some after market filters can restrict flow with magnet installed!! Just towed my rig, 03 4500 and 30' inclosed car trailer to pheonix and back, my trans never got over 150. Mine has deep pan and big factory cooler stock!!!
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Old 04-21-2010, 05:49 PM   #3 (permalink)
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Quote:
Originally Posted by 7902sc View Post
Check fluid level, too high they will run warm? make sure has allison spin on filter,some after market filters can restrict flow with magnet installed!! Just towed my rig, 03 4500 and 30' inclosed car trailer to pheonix and back, my trans never got over 150. Mine has deep pan and big factory cooler stock!!!
I can get a 1" deeper pan from Allison for $50. Takes 3.5 extra quarts. Not sure if I want anything to hang down any lower.
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Old 04-21-2010, 08:09 PM   #4 (permalink)
Detox
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Never flush an allison just drain it

Flush is not recommend by allison and thus can damage the transmission
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Old 04-21-2010, 09:38 PM   #5 (permalink)
rieker69
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Quote:
Originally Posted by Detox View Post
Never flush an allison just drain it

Flush is not recommend by allison and thus can damage the transmission
Only flushed because 2 different transmission shops recommended it.
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Old 04-21-2010, 11:18 PM   #6 (permalink)
jake111
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Your local transmission shops with flushing machines may recommend flushing, but Allison does not. Take your pick.

Since they didn't know what Allison recommends, it's likely that they "overfilled". The proper fill level is:
- less than 1/4th of the way up in the hot hashed area at 160*F.
- less than the top of the hot hashed area when over 200*F.

If it is filled more than this, it will likely run hot.

If the outside air is hot (over 100*F) then you'll probably see trans temps around 200*F.

If hot-running is still a problem, then the general advice is:
- run Transynd or other TES-295 fluid.
- consider a larger fluid cooler up front.

Oh, and you might check to see what fluid they installed. Dex-VI is not recommended (I'll let you search to see why). They should have used a fluid "equivalent to the specification formerly known as Dex-III". Best choice is Transynd/TES-295. Second best is synthetic for "older GM", like Mobil 1 Fully Synthetic ATF.
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Old 04-21-2010, 11:43 PM   #7 (permalink)
rieker69
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Quote:
Originally Posted by jake111 View Post
Your local transmission shops with flushing machines may recommend flushing, but Allison does not. Take your pick.

Since they didn't know what Allison recommends, it's likely that they "overfilled". The proper fill level is:
- less than 1/4th of the way up in the hot hashed area at 160*F.
- less than the top of the hot hashed area when over 200*F.

If it is filled more than this, it will likely run hot.

If the outside air is hot (over 100*F) then you'll probably see trans temps around 200*F.

If hot-running is still a problem, then the general advice is:
- run Transynd or other TES-295 fluid.
- consider a larger fluid cooler up front.

Oh, and you might check to see what fluid they installed. Dex-VI is not recommended (I'll let you search to see why). They should have used a fluid "equivalent to the specification formerly known as Dex-III". Best choice is Transynd/TES-295. Second best is synthetic for "older GM", like Mobil 1 Fully Synthetic ATF.
What about the 1 inch deeper pan?
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Old 04-22-2010, 12:31 AM   #8 (permalink)
DURAtotheMAX
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200* is perfectly normal/safe for an allison, in my own opinion.
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Old 04-22-2010, 02:51 AM   #9 (permalink)
Detox
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Flushing might have damaged it and if so I would be throwing a bitch fit at the idiot who told you to flush it
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Old 04-22-2010, 04:01 PM   #10 (permalink)
rieker69
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Quote:
Originally Posted by Detox View Post
Flushing might have damaged it and if so I would be throwing a bitch fit at the idiot who told you to flush it
It was flushed using the "hoot" method. I did my self. I think some of my problem is I got a little to full. I think the spin on filter I got the transmission shop is a knock off allison. Just order a deep pan and have a Allison filter to put on as well. The temp was the same before I flushed it as well.
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