Allison 6 speed pushing oil out the breather

Reedy

New member
Aug 16, 2016
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Perth Western Australia
I have a Lbz with an Allison in my 105 series landcruiser , usual mods tune , lift pump , problem is it pushes oil out of the breather . I have checked the level even let it run low incase the dipstick is incorrect as i brought it from a wrecker in the states . I do drive the car hard and do not expect it to last forrever just has me stumped to what is going on . Thanks
 

Mike L.

Got Sheep?
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Aug 12, 2006
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Fullerton CA
Check internal filter for blockage. Look at the round hole at the bottom of the sump filter and see if you can see internal plastic ribs prodru
ding through the paper element.
High fluid level under heat will do this also.
 
Last edited:

bmc1025

Member
Jan 25, 2013
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Big Bone, KY
Measure the dip stick just in case it has been swapped with a shorter 4l60 stick. I chased my tail on one last year and I know it is unlikely but it wont hurt to check.
 

Reedy

New member
Aug 16, 2016
4
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0
Perth Western Australia
Thanks for that , Mike i changed the internal fillter ,oil and spin on fillter and took it for a drive and it still breathed when cool . I will measure the dipstick but if i let it run low it starts to slip .