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so i want to do the 1-2 part of the jmod but im confused. on the 1-2 accumulator, am i removing the bottom spring all together or replacing? which spring would i replace it with?
Install the new 1-2 accumulator assembly with the new springs, and lubricate them slightly with a small amount of clean Mercon V fluid. I elected to leave the bottom spring out to firm up the 1-2 shifts. Push the entire assembly, including the retainer, up into the cylinder bore. You may need to use one hand to hold the assembly up high enough to re-install the snap-ring.
Install the new rubber bonded accumulator piston (F7AZ-7F251-AA) and use the blue return spring on the top (F75Z-7F284-AA). Do not install the original spring on the bottom of the piston. Leaving the spring out will firm up the 1-2 upshift. Re-install the accumulator retaining cover (7F247) followed by the snap/retaining ring (7384). The orientation of the accumulator cover can be confusing if your not paying attention when it?s removed. Always look for the marks in the spring perch inside the cover, to tell you which end is up. Obviously, the marks mean the spring was rubbing and that end is up. There is also a part number stamped into the cover, the p.n. goes down. Use the snap/retaining ring pliers to re-install the snap ring.
