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Discussion Starter · #1 ·
found on GM site HD trucks,


Reduced front 8.25 4WD axle lube levels from 1600 mL to 1430 mL (testing has verified reduction will not affect performance)
 

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Discussion Starter · #6 ·
I wasn't sure what size front we have but this spec is listed under all the pick up trucks even the 3500 ?


How about this change,


Reduce diameter of propshaft from 5.75" to 5.00" on K25/35 with M74 transmission.
 

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I've always added fluid until it started coming out of the inlet hole. Once it stopped seeping out then I put the plug back in and was good to go.
 

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JimWilson said:
I've always added fluid until it started coming out of the inlet hole. Once it stopped seeping out then I put the plug back in and was good to go.




This is what I did, and it held 2 full quarts.
 
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