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Home » Public Forums » GMCnet » Link to a great explanation of the hydraulic operation of a TH400 transmission (Applicable to the TH425 as well)
Link to a great explanation of the hydraulic operation of a TH400 transmission [message #355878] Fri, 19 June 2020 08:41
RF_Burns is currently offline  RF_Burns   Canada
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Registered: June 2008
Location: S. Ontario, Canada
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I was googling around last night searching for info on my random no auto shift from first to second gear.

I came across a great article explaining how the various valves work together to control the operation of the Turbo-hydramatic transmissions, so it applies to the th425 as well.

http://www.ckperformance.com/Files/112573/VOLUME%201%20CHAPTER%206.pdf

I'm still working on the Honey-do list, so I haven't been able to work on the Murray's transmission issue yet.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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