727 pan gasket

[moweepea]

Tomorrow morning I'm going to put one of those hard pan gaskets on my 727...so I don't mess up what is the correct way to install one of these? In my later years I have been known to do it wrong and then I pay and pay... Thanks

 

[Garys1969RR]

I am doing the same thing next Saturday, but my trans is out of the car. Once you get the pan off, clean it thoroughly inside and out with solvent. Then remove all old gasket material with a scraper and a wire wheel. Clean it again, as well as all the bolts. I like to apply black RTV silicone to the pan rail, lay the gasket on there , then insert each pan bolt into place from the top down to align all the holes and hold the gasket in place. While the sealer is drying, clean the bottom of the transmission where the pan attaches. Scrape off all the old gasket material. Also remove the filter by removing the 3 attaching screws. Put on a new filter. This is also a good time to adjust the 2 bands. The low/reverse band adjustment is only accessable with the pan off. Then remove all the bolts you put on the pan rail earlier. By now the gasket should be held in place with the silicone. Install the pan with 2 bolts to align it, then put the rest in and snug them down evenly. I think torque to the bolts is 15 ft lbs. Hope this helps. Not a difficult job, just take your time and do it right. Refill with Dexron/Mercon. I buy mine from Wal Mart for $12.00 a gallon. Good luck!

 

[moweepea]

so Gary you are saying with the new hard gasket put silicone on it? Reason I ask, is some guys say not to use silicone on the hard gasket...I just want it not to leak!!1

 

[Garys1969RR]

so Gary you are saying with the new hard gasket put silicone on it? Reason I ask, is some guys say not to use silicone on the hard gasket...I just want it not to leak!!1

Well I usually use the black rubber/neoprene gasket. Never used the hard one, or heard of it. Can you give a part # and manufacturer? I will look at one. Ok Thanks

- - - Updated - - -

And I DONT like the cheap cork gasket. Tighten the bolts too much and you get a huge leak! Lol. The one I wrote about, you don't use silicone on the tranny side, just the pan side. Then when you take it apart, it stays with the pan and can then be re installed with little work. And I take mine apart all the time. He He

 

[Pistol Pete]

I have one on the 2500 and it's been off and on several times now and I've never used any kind of sealant.

 

[coloradodave]

I concur; nothing or a little bit of Gask-A-Cinch to hold it in place on the pan side. Also, turn the pan upside down on a hard, flat surface and tap over the bolt holes with a flat ended hammer or an upside down socket and a hammer to flatten the area around the holes in case someone over tightened the bolts at one time. Torque to 15 ft. lbs.

 

[67 coronet]

no sealant.trans fluid is very heavy with solvents and most sealant wont stand up to continued exposier.you will start to get seepage after a while.just bolt it in after a good cleaning of both sufaces.check the pan with a strait edge,just to be sure.if it looks a bit beet up,place it on some wood and tap on the pan bolt holes with a ball peen hammer.hit them from the trans side of the pan.