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drgrcr1156 · 01-13-2016, 01:28 PM

Unfortunately, the TH400 release is slow with the cast iron valve bodies due to the passage lengths the fluid has to go through. You should be able to leave good with a .500 tree though. The new CNC machined aluminum valve bodies are much quicker since they reroute the passages and other upgrades with internal solenoids. I race a TH400 in SG and have a Griner Valve body which was one of the first to offer machined aluminum and is the only way to go with a .400 tree. Still not as fast as a poweglide but some of that may be the car set up.

Bob

01-13-2016, 01:28 PM	#2
drgrcr1156 Junior Member Join Date: May 2010 Location: Massachusets Posts: 91 Likes: 0 Liked 2 Times in 1 Post	Re: Slow Trans Brake Release Unfortunately, the TH400 release is slow with the cast iron valve bodies due to the passage lengths the fluid has to go through. You should be able to leave good with a .500 tree though. The new CNC machined aluminum valve bodies are much quicker since they reroute the passages and other upgrades with internal solenoids. I race a TH400 in SG and have a Griner Valve body which was one of the first to offer machined aluminum and is the only way to go with a .400 tree. Still not as fast as a poweglide but some of that may be the car set up. Bob