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Old 04-21-2016, 03:32 AM   #107
MTCK
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Join Date: Dec 2009
Location: Fairbanks, AK
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Re: 1987 R20 Suburban LQ4 4L80E swap

You are probably up to speed on this, but do you have the right fittings at your trans to maintain flow? I can't recall what year they went to the different style but there is a deep fitting on the supply or return that if not used will cook your trans right away.
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1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's
1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow
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