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What is the best fluid for L52 Transmission?

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Old Jun 2, 2010 | 01:07 PM
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blackhawks920
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From: Upstate, NY
What is the best fluid for L52 Transmission?
Heard that Red Line makes the best tranny fluid, but I was wondering what viscosity is appropriate for a stock L52 and whether it can handle GL 5. Thanks.
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Old Jun 2, 2010 | 01:37 PM
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83
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From: Montana
It needs GL4. Not sure when you get into the synthetics, but the tranny takes GL4.
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Old Jun 2, 2010 | 02:52 PM
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suncomb1
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From: Downingtown, PA
I use Mobil 1 Gear lube in my Differentials, Transmission and Transfercase. I have it used for years. My truck just turned 27 years old and no problems with any of my running gear.
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Old Jun 9, 2010 | 05:36 PM
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Al's Chop Shop
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From: Portland, OR
do not use GL5, only use GL4. I made the mistake of using GL5 and it seems to be too 'slippery' for the synchro's and now i have to shift it like a bread truck (slow).


GL4

Al
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