TH400 rear mount spacers
- Thread starter Dave M
- Start date
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- First Name
- Andy
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- '77, '78, '79, '84, '88
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- K5 thru K30
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- 350-454
Weird. I don't remember seeing those before. I wonder if my '78 has them.
Matt69olds
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- GMC 1/2 ton
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- 455 Olds
I have removed several from core transmissions over the years. I’ll try to remember to grab a couple tomorrow for measurements
Ricko1966
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- 350
I hope I can explain this so it makes sense, the actual measurement isn't really that important, what is important is that the tailshaft of the transmission and rearend pinion are on the same plane.So if your tail shaft is level with the ground your pinion needs to be level to the ground.If the pinion is canted up 2 degrees the tailshaft needs to be canted down 2 degrees. You can get an angle finder app for your phone check the angle on the rear yoke and raise the end of the transmission match it.
