Thread: NP440 MY6 help
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Old 02-11-2024, 12:45 PM   #7
birdistheword
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Join Date: Apr 2011
Location: Tacoma, Washington
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Re: NP440 MY6 help

I did this swap in my 69 C10 probably like seven years ago. I found a complete one with shifter. I rebuilt it and it was way more fun to drive compared to the SM465. The only issue I had was when shifting out of reverse it would sometimes bring 1-2 with it. I should've rebuilt the shifter or installed bronze bushings in the shifter linkage. I thought it was odd they took ATF instead of the normal 80w90, but liked the fact the gear ratios were nearly identical to a 700R4.
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Erik
1969 Chevy K20 6.0L/4L80E/NP205
1971 Chevy C30 Cheyenne Longhorn 454/TH400
1979 Chevy K30 dually currently in pieces
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