69SSC5

700r4 auto transmission. i changed the filter and the pan gasket. bolted the bolts to spec. two days later i look under the car and the pan gasket is leaking around one of the bolts. So I went out and bought a new steel transmission pan and a new rubber gasket. I want to make sure it doesn't leak this time. do you guys use a gasket or do you guys use sealer on the pan instead of a gasket? any tips for installation are appreciated... thanks guys

94z07fx3

IMO it's not a good idea to use sealer there. I fear an RTV booger will form and fall off and get into one of the million little passages.

Are you 100% sure that you got all of the old gasket off?

BTW for pans I start each bolt before I snug any bolt. Then I snug every bolt before I torque any bolt. Then I torque the bolts. Cork or rubber I haven't had a leak before.

PLRX

Yes I use a gasket and I use my wrist as a torque wrench on that one. The auto transmission gasket I used is made out of rubber and I ensured it was tight.

No leaks.

Try to stay away from the cork gasket.

pricesgarage

gasket only unless tour working on a mopar fwd tranny or imports but for 700r and 4l60e use a gasket i use a fiber gasket from transtar at my shop if wouldnt hurt to use a thin bead of sealant on the pan side if your using a rubber or cork gasket never on the case side the band release port is can get plugged and burn 2nd gear and 4th out in a hurry

summerst

I used the rubber gasket that comes with the Pro-King Filter kit (Part Number FK-171) which includes the gasket and filter on my 1990 and 1991. You can find it at Advance Auto Parts. My mechanic liked what he saw when he opened the box and found the gasket. Too bad its made in China.

TorchRedlt4man

Torquing the bolts properly is what will keep the gasket from leaking. Very easy to tighten them too tight and that is when the leaks occur.

I would never use any RTV or sealer when replacing a transmission pan gasket.

As mentioned earlier, way too easy for a small piece to enter your transmission.

C4boy

Part of the problem is the short tranny pan bolts and they are only supposed to be torqued to about 8-12 ft/lbs, IIRC. I've used cork in the past with just enough RTV or Indian Head to hold the gasket in place.

69SSC5

thanks for your help guys... i put the new pan on with a new gasket. I think the gasket was rubber or cork/rubber, the gasket came flat on a piece of cardboard and look like it was really good quality. No leaks as of yet...

Cliff Harris

I just installed a new pan gasket (Farpak) and torqued to 96 in-lbs. After sitting overnight (without running) I torqued again and found that it took about 1/8 turn to get back to 96 in-lbs. The Farpak gaskets are weird items, but they sure do seal well, even when soaked with trans fluid. Recommended by Dana Wilkes of ProBuilt Transmissions.

I always retorque my trans pan bolts after a few heat/cool cycles.

Drew1Down

i have used both the cork and the rubber gasket in my 4L60's but before i reinstall the pan i get a punch and fits in the holes and tap the holes down (from the transmission side) so when i put the pan on and torque it down i know im getting a firm seal around the impressions inbetween the bolt holes around the pan.

FYI, overfilling the transmission can cause the pan to leak around the seal