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Fluid Capacity/Fluid Recommendations

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Old Aug 3, 2011 | 12:55 AM
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Default Fluid Capacity/Fluid Recommendations

This is the first time I've pulled the tranny. Needless to say I had to drain it, I did this the hard way as most of it ended up all over the garage floor.

I was wondering what the capacity is on the t-56, I thought I read somewhere that its 4 quarts, is this correct? Also what brand/type of fluid is used?
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Old Aug 3, 2011 | 04:14 AM
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dextron 3 is what i used.
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Old Aug 3, 2011 | 03:52 PM
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Been doing some more reading/searching, it seems the capacity is 3.8 quarts, can I just dump 4 in and be done with it or will .2 of a quart make a difference?
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Old Aug 3, 2011 | 05:09 PM
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Just open the fill plug and fill it till it start coming out the fill hole
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Old Aug 3, 2011 | 05:18 PM
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All I can find locally is castrols dex/merc fluid will this suffice. It says it's for pre 05 gm automatics?
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Old Aug 4, 2011 | 01:31 PM
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just dump 4qts in through the shifter hole. i run royal purple and have also had good luck from mobil 1 atf
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Old Aug 6, 2011 | 11:57 AM
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Will castrol dex/merc work it's all I can find?
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Old Aug 6, 2011 | 12:02 PM
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Any Dex III ATF will work. Add fluid until it starts to come out of the fill hole.
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GM Synchromesh fill to over flow.
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Old Aug 9, 2011 | 09:31 PM
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Redline ATF in my transmission.

Unbolt the fill plug on the drivers side of the tranny and dump all 4 quarts down the shifter opening. Bolt the fill plug back in place once the .2ish quarts finishes spilling out.
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