Proper fluid in the Allison

Mike L.

Got Sheep?
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Aug 12, 2006
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So I realized I have nearly 50,000 on my fluid in my SCIV :eek: It has Transynd in it

I like synthetic fluid what about Mobil 1 ATF

or should I just go with some conventional
if so what conventional do you recommend

Stick with the TranSynd at this point.
 

FamilyWagon

New member
Jul 7, 2010
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Western Mass
after readibg thru here i think my best bet for a stock LLY Alison 5 speed is Mobil 1 ATF... and some mystery additive?? can anyone clear up my confusion?? Thanks
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
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ZEPHYRHILLS, FL
:rofl:

The Allison filters are so cheap (relative to the "AC Delco" ones, which are Allison filters in an AC Delco box and sold for 250% profit) that you're stupid to NOT use them....

$8.36 fro my local ALLISON dealer. That is less than the parts stores get for there chinese knock-off.
 

Burner

Old Hand
May 6, 2008
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I can't tell you how many times I've seen the magnet tossed. ...then again, it is an Allison.
 
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FamilyWagon

New member
Jul 7, 2010
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Western Mass
one more question on the Mobil 1, if i swap to that as a synthetic, how will it mix with what is leftover in my torque converter?? or is there an easy way to drain the converter thru the pan? or does it completly stay searate?
 

MACKIN

Smell My Finger...
Aug 14, 2006
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Connecticut
Most high performance TC have a drain but the stock one does not.Regardless the cooler and lines retain fluid also. It's ok to mix or you can flush the entire transmission. Best choice,flush
 
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8lug

Escalade HD
Oct 16, 2009
175
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Canada
Sorry to dig up this thread, I am about to do a fluid & filters on my 6 speed StgV I have run Synth Amsoil from new, stick to it or switch it up? Thanks
 
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JD4440

<< Lo-Carb Monster
Feb 27, 2009
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Orlinda, TN
Is there any of the 295 approved on Allisons site to stay away from? I'm about to change the OE fluid @ 100k in my 8.1 ton. We're a Pennzoil, ect. distributor so it'll have to come from there.
 

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
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Fullerton CA
I'm testing some new Lucas fluid with a nontested TES 295 rating. Time will tell. So far IMHO the CITGO is better than anything I've seen.