700r4 pan leak - The 1947 - Present Chevrolet & GMC Truck Message Board Network

UKNOWME · 10-28-2015, 01:16 PM

I cannot get the pan/gasket to seal on my 700r4. I have gone through 2 OE pans and 3 gaskets. It's been suggested that I try an aluminum pan and/or a rubber gasket with steel inlay. Can anyone attest to using either of those? If so where did you get them? Thanks

**1774btcrew** · 10-28-2015, 01:23 PM

I have a 3 quart aluminum 700r4 pan for sale. Send me a PM if interested. It wasn't leaking when I pulled it so that might be a good sign.

beamn7 · 10-31-2015, 02:18 PM

Double check the seal for the TV cable. Seen alot of those leak and mask themselves as a pan gasket leak. Also check the seal for the fill tube....

kalbert · 10-31-2015, 02:45 PM

Agree with abeamn7. Also check the o ring around the selector shaft, and pull the converter shield off and look for wetness, pump seals sometimes disguise themselves as pan leaks too.

Another possibility, my pan gasket leaks but only after sitting for several months, the converter drains back and over fills the case.

UKNOWME · 10-31-2015, 02:56 PM

Quote:

Originally Posted by kalbert

Agree with abeamn7. Also check the o ring around the selector shaft, and pull the converter shield off and look for wetness, pump seals sometimes disguise themselves as pan leaks too.

Another possibility, my pan gasket leaks but only after sitting for several months, the converter drains back and over fills the case.

The selector shaft seal does have a minor leak but you nailed it with the pump seal. We put it on the rack the other day and left it overnight and determined the pump seal was definitely most of the fluid leak. Still trying to determine if my tv needs adjusted properly of if I have an internal problem before pull the transmission. If its internal I'm just gonna wait to do the 5.3/4L60E swap.

10-28-2015, 01:16 PM	#1
UKNOWME Registered User Join Date: Aug 2012 Location: Clovis, NM Posts: 2,705	700r4 pan leak I cannot get the pan/gasket to seal on my 700r4. I have gone through 2 OE pans and 3 gaskets. It's been suggested that I try an aluminum pan and/or a rubber gasket with steel inlay. Can anyone attest to using either of those? If so where did you get them? Thanks __________________ 2018 Audi S5- wife's ride 1980 Chevy Scottsdale http://67-72chevytrucks.com/vboard/s...d.php?t=543511 1981 Chevy Silverado- in pieces 1964 Chevy c10 2017 Jeep Wrangler JKU

10-28-2015, 01:23 PM	#2
1774btcrew Senior Member Join Date: Jun 2009 Location: Phoenix AZ Posts: 4,603	Re: 700r4 pan leak I have a 3 quart aluminum 700r4 pan for sale. Send me a PM if interested. It wasn't leaking when I pulled it so that might be a good sign. __________________ AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck.

10-31-2015, 02:18 PM	#3
beamn7 Registered User Join Date: Oct 2011 Location: Wildomar, CA Posts: 466	Re: 700r4 pan leak Double check the seal for the TV cable. Seen alot of those leak and mask themselves as a pan gasket leak. Also check the seal for the fill tube....

10-31-2015, 02:45 PM	#4
kalbert Registered User Join Date: Jun 2012 Location: Minnesota Posts: 509	Re: 700r4 pan leak Agree with abeamn7. Also check the o ring around the selector shaft, and pull the converter shield off and look for wetness, pump seals sometimes disguise themselves as pan leaks too. Another possibility, my pan gasket leaks but only after sitting for several months, the converter drains back and over fills the case.

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