Dec 11, 2008 · This fluid is the new service fill and factory fill specification for all Hydra-Matic GM transmissions. It will be used as a factory fill for all 2006 MY Hydra-Matic automatic transmissions starting on April 4, 2005, and it will be mandatory service fill by January 2007.

Aug 12, 2012 · Total capacity will be up around 12-14 quarts, but this would be a dry system with no fluid in the converter, coolers, or lines.

Jul 23, 2012 · What's involved in flushing the transmission? Is it really all that it's cracked up to be, or is it just a way for shops to get your $$$. How much does it cost on the 4L80E? How often should it be done?

Jul 7, 2009 · Hey gents, been searching around and cant find any info readily available, here, or elsewhere. Anyone added a temp gauge for their 4L80E, where did you put the sender? Dont have the scratch for an aftermarket pan just yet, or I'd put it in the drain plug there. Wondering if there's a preferred...

Jul 5, 2021 · Is Valvoline Maxlife synthetic ATF ok for use in the 4L80E? How many gallons will I need to do a full flush?

Aug 10, 2011 · Additive advice 4l80E 98 Suburban K2500 The Suburban sat for at least a week. It didn't move forward or back without revving up a significant amount. It has over 200,000 miles on it now. Tonight I checked the fluid. It read way over full sitting not having been run or running. I...

Oct 5, 2009 · It really appears that my tranny is leaking in the back by the bracket towards the transfer case right wehre the main wire harness goes in. I didn't want to touch it and make it worse until I learned about it more. What type of seal is this?

May 27, 2018 · OK I have a 2003 lifted silverado 2500hd crew cab 6.0 vortec, 4L80e trans that has always shifted pretty hard if I don't let up into 2nd gear. So I have mostly always left off the gas just in time for the shift. the rest of the gears seemed …

Feb 24, 2009 · 3 & 4. trans pans can help, but longer fluid is heated, longer takes to cool. replaced stock aux cooler with one rated for 28k lbs, relocated stock to secondary location under truck, Turbinedoc also runs similar setup, he probably b4 me. works very well on cooling. too cold and high viscosity could damage seals. thermostat and fans work very ...

Oct 5, 2020 · Ok, I'm new to the forum. I came across this thread looking for insight to the 4L80E in my 1999 K3500 454 4x4 with 103,000 miles losing overdrive only after it gets to operating temperature. I've changed the ETC, all the solenoids, TPS, fresh fluid and filter.