3175375
Senior Member
Ok
Thanks
727 trans pan gasket that doesn't leak??
- Thread starter 1961 dodge
- Start date
Thanks
The A904/A500 pan gasket is P/N 4295875AC. It is used in Dakotas/Jeep XJ's.
ynst
New Member
Aviation gasket cement. Haven't had that leak in 60 years on a slew of transmissions I've changed filters in on multiple occasions.
volaredon
Member
I use either Indian Head or Aviation seal or even Hi Tack on many places but I try to avoid using anything besides a gasket on a trans pan.
Is 02464324AC a substitute? Amazon has that. If not can you suggest a good source for 02464324AD please? Does it need longer bolts than stock? I read that somewhere. Mine is overdue for replacement. Thanks in advance.
Carl
volaredon
Member
No C body "should" have a 904. As heavy of a car as they are they need the heavy duty -ness of a 727.....
3175375
Senior Member
All 3 of the C bodies I own have 318s and 904s.
I bet that almost all of the small block C bodies had 904s.
My question about the 904 gasket is for my A-body Barracuda.
1961 dodge
New Member
there some trick to that mopar gasket? put it in with a new summit cast alum pan and it still leaks.
twostick
Senior Member
I've rarely seen a pan leaking that loose bolts wasn't the reason.
I've lost count of the number of leaking fill tube Orings that drool into the pan rail that make it look like the pan is leaking...
Selector/kickdown shaft seals are a close second.
Kevin
I've lost count of the number of leaking fill tube Orings that drool into the pan rail that make it look like the pan is leaking...
Selector/kickdown shaft seals are a close second.
Kevin
Are you sure that's where it's leaking?
Quite a few of the trans gasket leaks are actually leaks from the transmission shift seal and throttle link seal. That's a bit dependent on the year... Earlier transmissions with the cable shift don't have that shifter seal, but they still have the throttle linkage seal.
TF 727 "How To" shift lever seal replacement
Could be the pan too.
I saw this the other day... (not my pic) and it's a Summit Chevy rear end cover. Note the bolt holes don't match.
Spray everything down with brake cleaner and find a BIG piece of flat cardboard to place under the oil pan, on the floor. That way, you can remove the cardboard to see exactly where the drops were coming from, rather than speculating after moving the car.
The shift shaft seal, along with the neutral safety switch can be lh side contributors. As the filler tube seal/o-ring can be from the other side of the case. In any o-ring seals, IF POSSIBLE, get the OEM part number rather than a generic o-ring from an auto supply. I went through that on the GM side of things, 45 years ago. Any o-rings need to be verified to be compatible with ATF.
After you see the location of where the drips landed, then look at those locations AND trace the fluid patch to its origination. Progress from there to repair the situation.
Please keep us posted on your progress,
CBODY67
The shift shaft seal, along with the neutral safety switch can be lh side contributors. As the filler tube seal/o-ring can be from the other side of the case. In any o-ring seals, IF POSSIBLE, get the OEM part number rather than a generic o-ring from an auto supply. I went through that on the GM side of things, 45 years ago. Any o-rings need to be verified to be compatible with ATF.
After you see the location of where the drips landed, then look at those locations AND trace the fluid patch to its origination. Progress from there to repair the situation.
Please keep us posted on your progress,
CBODY67
twostick
Senior Member
The correct fill tube Oring is actually flat sided, not round. The hardware store round profiled rings pretty much always leak, sometimes worse than the original worn out square profile ones do.
Kevin
Kevin
My '67 Monaco (a Canadian car) came with a poly 318 and a 727. Or at least I've always had the recollection it was a 727. You, and this 2018 Hemmings article, have me wondering:
They say 318's (and 360's) were always paired with 904's. The 904 pan has 14 bolts? And the 727 has - ?
Seems like the 727 could be paired with any /6 or L/LA motor for "HD" or "Fleet" applications? OF course, with the particular bellhousing bolt pattern. Especially in C-body cars.
CBODY67
It's funny, but out of 12 C bodies, I've only had one 904 and it was behind my slant 6, the rest of my C have all had 727s, most behind 318s
3175375
Senior Member
Both have 14 bolts, pans have different shapes. From the b bodies only site:
https://www.forbbodiesonly.com/moparforum/attachments/727904gasket-jpg.455772/
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