Hey Folks! Long time anonymous lurker, first time poster.
I have a 2005 Dodge Magnum RT, totally stock with the NAG1 transmission and 131K miles. Daily driver, no track or mods. Car shifted fine 99% of the time, except in prlonged and heavy stop and go NYC traffic where I'd get a hard 1-2/2-1 shift. I purchased the car back in '09 with about 75K miles on it and decided it would be a good time to do fluid/filter swap. While in there, I decided I'd drop the valve body and proactively do a Sonnax Overlap Control Valve sleeve kit. Since I was going that far, I picked up the Transgo 722.6 kit as well, and installed their "updated" Pressure Regulator Valve and Lubricating Regulator Valve.
I reassembled the valve body, torqued everything to spec, added my ATF+4, used my Autoenginuity scan tool to pull temp and added fluid to hit level recommended on the curve. The car shifted smooth as silk, even better than before.......except for third to fourth. Keeping my foot on the throttle with all shifts up to 4th, the transmission seems to go to neutral, RPM's rev up, then lands relatively smoothly in to 4th all in about 1-2 seconds. 3-4 shifts (with the autoshifter) with my foot of the gas are smooth.
Thinking I fudged something, I pulled the valve body again. I replaced the o-rings on the 3-4 solenoid and confirmed resistance on the solenoid against spec. I also pulled all four of the 3-4 valves, looking in each hole for any debris, scoring or anything that jumped out at me. Nothing.
I'm at a bit of a loss on next steps. I dont think its the K3 since I didn't have any 3-4 problems before the fluid swap, but may be the fluid swap made the clutches angry?
I had considered pulling the valve body and splitting it open to clean out the channels. A bit gunshy to do this though since I may create more problems.
Also considered pulling the transgo parts, but having smooth shifts except for the 3-4 seems to rules those out as faulty.
Wanted to reach out to the audience and see if y'all had any ideas. Thoughts, comments or feedback are appreciated! Thanks in advance!
-A
I have a 2005 Dodge Magnum RT, totally stock with the NAG1 transmission and 131K miles. Daily driver, no track or mods. Car shifted fine 99% of the time, except in prlonged and heavy stop and go NYC traffic where I'd get a hard 1-2/2-1 shift. I purchased the car back in '09 with about 75K miles on it and decided it would be a good time to do fluid/filter swap. While in there, I decided I'd drop the valve body and proactively do a Sonnax Overlap Control Valve sleeve kit. Since I was going that far, I picked up the Transgo 722.6 kit as well, and installed their "updated" Pressure Regulator Valve and Lubricating Regulator Valve.
I reassembled the valve body, torqued everything to spec, added my ATF+4, used my Autoenginuity scan tool to pull temp and added fluid to hit level recommended on the curve. The car shifted smooth as silk, even better than before.......except for third to fourth. Keeping my foot on the throttle with all shifts up to 4th, the transmission seems to go to neutral, RPM's rev up, then lands relatively smoothly in to 4th all in about 1-2 seconds. 3-4 shifts (with the autoshifter) with my foot of the gas are smooth.
Thinking I fudged something, I pulled the valve body again. I replaced the o-rings on the 3-4 solenoid and confirmed resistance on the solenoid against spec. I also pulled all four of the 3-4 valves, looking in each hole for any debris, scoring or anything that jumped out at me. Nothing.
I'm at a bit of a loss on next steps. I dont think its the K3 since I didn't have any 3-4 problems before the fluid swap, but may be the fluid swap made the clutches angry?
I had considered pulling the valve body and splitting it open to clean out the channels. A bit gunshy to do this though since I may create more problems.
Also considered pulling the transgo parts, but having smooth shifts except for the 3-4 seems to rules those out as faulty.
Wanted to reach out to the audience and see if y'all had any ideas. Thoughts, comments or feedback are appreciated! Thanks in advance!
-A