Log in

View Full Version : Mag Hytec 727-DD Transmission Pan Install


004x41500
10-18-2010, 02:51 AM
(Cut from the lower portion of the Sonnax Sure-Cure Install DIY)

Legal disclaimer- South East Mopars and myself are NOT RESPONSIBLE FOR ANY SCREW UPS, BROKEN PARTS/TOOLS, PROBLEMS, INJURIES AND/OR DEATHS. YOU ARE DOING THIS AT YOUR OWN RISK. Just because I did this myself, does not always mean that you can, I still recommend PROFESSIONAL installation. ALWAYS use proper equipment, safety precautions and jacks/jackstands that are rated for the weight of the vehicle or higher.

At this point I elected to install a Mag Hytec 727-DD pan. It had a spacer I needed to install that lowers the filter into the pan a bit deeper. You can see that here:

http://i518.photobucket.com/albums/u348/mjnagel/transpics019.jpg

Here's a comparison of the old pan and the Mag Hytec pan (ignore the mess in the garage):
http://i518.photobucket.com/albums/u348/mjnagel/transpics017.jpg
BEEFY!

Inside of the pan, the plug in the bottom is magnetic to catch fine clutch debris and when it's removed, it leaves a flush hole to get ALL the old ATF out. Much nicer than the old way!
http://i518.photobucket.com/albums/u348/mjnagel/transpics016.jpg



And finally installed:
http://i518.photobucket.com/albums/u348/mjnagel/transpics022.jpg

Put a new gasket on top of the pan and position the pan over the VB and attach it with the ˝” bolts. Torque the pan down to specs using a cross hatch pattern. My pan instructions said about 14 ft/lbs. Which is 168 inch/lbs. I cut that in half and completed the cross hatch pattern twice: once at 84 inch/lbs and then again at 168 inch/lbs to ensure a good seal. Recheck all bolts.

Reinstall the gearshift linkage first (the one without the spring) make sure it sits flush at the bottom of the transmission case or it’ll have some play in it that will cause it to not shift firmly into gear, especially D, 2, and 1. A squirt of WD-40 will help it slide on nicely. The arm should attach solidly with little or no wiggle at all. Tighten the 7/16” bolt in the back. Install the throttle linkage and tighten down as well. Make sure you install the spring before you install the arm. It’s just easier that way. The top notch is “D” shaped so you must install it in the proper orientation. There should be a little of the mounting shaft sticking out of the top if you have it on correctly. Pull the spring to the far mounting point with your needle nosed pliers and then set it in place. Reconnect the 9/16” throttle linkage guide brace to your right. Plug sensors back in.

Get the small funnel and put 6 quarts of ATF +4 into the dipstick tube. Check the level. Put more in if necessary. Start engine in park and wait. I had a little clunking sound that scared the crap out of me, but I believe that was air escaping the system. Check ATF levels again and add more as the empty circuits will fill back up with ATF. Remember, the new Sonnax valves will lube the converter and other components in Park now, so the level will drop even though you haven’t cycled to neutral. Then slowly cycle through P, R, N, D, 2, 1 stopping for at least 30 seconds on each. Then check levels one last time. Button her up and close the hood and head on out to the parts store to either return the unused ATF or buy more if you're a little low.

Happy driving!


Thanks to aim4squirrels at DF for this DIY.