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Old 05-04-2018, 02:46 PM   #2
sick472
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Join Date: Jul 2015
Location: Sedalia Mo.
Posts: 1,130
Re: What transmission do I have? 72 Sierra Grande

The TH350 has a square or rectangular pan with a bit of one corner missing while the 400 has a funky shaped one. I can't really explain it's shape so look it up. Part of it kinda looks like the lower half of Texas. I believe the vacuum modulator on the 350 is on the right front while the 400 has it on the right rear. The 350 has a kickdown, cable, the 400 does not, it has an electrical swicth.
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He who is without oil shall throw the first rod. Compressions 8.7:1

1972 C10
1976 C10 (parts truck)
1985 K20
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