Transmission Leak

Katen · January 12th, 2008, 11:27 PM

K so i rebuilt my c4 last year round this time. Any who i found out that it is leaking again. so i think it is on the transmission pan which leads me to think that the guy i got it off originaly gouged the mating surface on tranmisssion where the pan bolts to. sorry to sound stupid or patrinize others but just want to get the idea accrossed where it is at. now can i just get that milled down or do i say screw it an buy a 1200 tranmission from jegs or summit? Please give your thoughts an ideas thanks

Keith

BigBlockFairlane · January 12th, 2008, 11:38 PM

Honestly it would have to be pretty smashed in not to seal.
I'd fill any grooves with JB weld.

More likely the pan screw holes are puckered and need to be peened flat or its not leaking at the pan but at the input shaft bushing. The pump seal is important but that bushing is what takes full pressure. On a rebuild that needs to be replaced. I have 2 cars that leak like freakin crazy now that need it done.

Katen · January 12th, 2008, 11:44 PM

See i replaced all of that when i rebuilt it. an i did flaten out the tranmission pan. but instead of a cork gasket i used rtv do you think that might be it

69fastback · January 13th, 2008, 09:29 AM

Use 2 gaskets.

Katen · January 13th, 2008, 03:29 PM

you dont duble gasket anything bro. that will actualy make it leak more so. plus i think i am just going to get a new transmission so it can hold more ponnys.

460brevill · January 14th, 2008, 08:40 AM

get a good b@m and foget it.

Mustero · January 14th, 2008, 01:46 PM

Reseal the pan with a single cork or even a silicon or composit gasket & some good rtv,but also check your dipstick/filler tube & make sure it is not the problem.I usually like to use rtv along with the o-ring to make sure theres no leaks there.

nba1341 · January 14th, 2008, 02:01 PM

took us 5 tries to seal the rebuilt c4 in my car and 2 diffferent pans + a trans cooler

460brevill · January 15th, 2008, 08:03 AM

if you use your trans,get an aluminun pan from jegs.it will seal better.

nba1341 · January 15th, 2008, 02:19 PM

Originally Posted by 460brevill

if you use your trans,get an aluminun pan from jegs.it will seal better.

+1 finally got a trick flow aluminum pan

Katen · January 16th, 2008, 01:05 AM

well the rtv didnt work the cork gaskets didnt work when i used them to. so i think i will try the tranny pan from jegs. if that does not work i will get a new transmission

460brevill · January 16th, 2008, 07:11 PM

i did a c4 leak today.it was the accumalater cover making it look like the pan was leaking.

7DMACH1 · January 17th, 2008, 05:09 PM

More than likely it's not the pan leaking. The lever seals are famous for leaking. This is the seals on the levers right above the pan. They leak and it looks like the pan is leaking. Just my .02

WAR-PARTY · January 17th, 2008, 06:17 PM

Originally Posted by Katen

you dont duble gasket anything bro. that will actualy make it leak more so. plus i think i am just going to get a new transmission so it can hold more ponnys.

Friggin flyboys, never double gasket anything, the fluids just squirt out between them. pull the pan clean every bit of fluid / oil off of the mating services. Put on the new gasket with RTV and lightly tighten, let set 24 hours and torque as specified.

460brevill · January 19th, 2008, 10:47 AM

they have a dye you can put in your trans and ride around the block.check it with a black light and you can see where it is comeing from.

68mustang · January 29th, 2008, 12:50 PM

Originally Posted by WAR-PARTY

Friggin flyboys, never double gasket anything, the fluids just squirt out between them. pull the pan clean every bit of fluid / oil off of the mating services. Put on the new gasket with RTV and lightly tighten, let set 24 hours and torque as specified.

do you know what the torque specification is fot an '68 c4 automatic

January 12th, 2008, 11:27 PM	#1
Katen Regular 1973 Coupe Mustang as fast as the restoration is going Join Date: Jan 2007 Location: Defiance, Ohio Posts: 142 iTrader: 0 reviews	Transmission Leak K so i rebuilt my c4 last year round this time. Any who i found out that it is leaking again. so i think it is on the transmission pan which leads me to think that the guy i got it off originaly gouged the mating surface on tranmisssion where the pan bolts to. sorry to sound stupid or patrinize others but just want to get the idea accrossed where it is at. now can i just get that milled down or do i say screw it an buy a 1200 tranmission from jegs or summit? Please give your thoughts an ideas thanks Keith

January 12th, 2008, 11:38 PM	#2
BigBlockFairlane Regular Join Date: Oct 2007 Posts: 161 iTrader: 0 reviews	Honestly it would have to be pretty smashed in not to seal. I'd fill any grooves with JB weld. More likely the pan screw holes are puckered and need to be peened flat or its not leaking at the pan but at the input shaft bushing. The pump seal is important but that bushing is what takes full pressure. On a rebuild that needs to be replaced. I have 2 cars that leak like freakin crazy now that need it done. __________________

January 13th, 2008, 09:29 AM	#4
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,572 iTrader: 0 reviews	Use 2 gaskets. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

January 14th, 2008, 08:40 AM	#6
460brevill Hardcore Enthusiast Join Date: Apr 2007 Location: Farmville VA Posts: 1,327 iTrader: 0 reviews	get a good b@m and foget it. __________________ i sixing 200 six with 300 hp.

January 14th, 2008, 02:01 PM	#8
nba1341 Banned 1965 Mustang Fastback Join Date: Apr 2007 Location: Los Angeles, Cal Posts: 24,982 Posts: 2,194 iTrader: 0 reviews	took us 5 tries to seal the rebuilt c4 in my car and 2 diffferent pans + a trans cooler __________________ I'm a good boy now. [COLOR=red][B]slow car club - crew member 7 of 9 [COLOR=White]Mood: Cool :cool: [/COLOR][/B] [/COLOR]

Transmission Leak

Transmission Leak

trans leak

torque specs

January 12th, 2008, 11:44 PM	#3
Katen Regular 1973 Coupe Mustang as fast as the restoration is going Join Date: Jan 2007 Location: Defiance, Ohio Posts: 142 iTrader: 0 reviews	See i replaced all of that when i rebuilt it. an i did flaten out the tranmission pan. but instead of a cork gasket i used rtv do you think that might be it

January 13th, 2008, 03:29 PM	#5
Katen Regular 1973 Coupe Mustang as fast as the restoration is going Join Date: Jan 2007 Location: Defiance, Ohio Posts: 142 iTrader: 0 reviews	you dont duble gasket anything bro. that will actualy make it leak more so. plus i think i am just going to get a new transmission so it can hold more ponnys.

January 14th, 2008, 01:46 PM	#7
Mustero Newbie 1966 Mustero 12.50 Join Date: Jan 2008 Location: Northern California Posts: 40 iTrader: 0 reviews	Reseal the pan with a single cork or even a silicon or composit gasket & some good rtv,but also check your dipstick/filler tube & make sure it is not the problem.I usually like to use rtv along with the o-ring to make sure theres no leaks there.

January 15th, 2008, 08:03 AM	#9
460brevill Hardcore Enthusiast Join Date: Apr 2007 Location: Farmville VA Posts: 1,327 iTrader: 0 reviews	if you use your trans,get an aluminun pan from jegs.it will seal better. __________________ i sixing 200 six with 300 hp.

January 16th, 2008, 01:05 AM	#11
Katen Regular 1973 Coupe Mustang as fast as the restoration is going Join Date: Jan 2007 Location: Defiance, Ohio Posts: 142 iTrader: 0 reviews	well the rtv didnt work the cork gaskets didnt work when i used them to. so i think i will try the tranny pan from jegs. if that does not work i will get a new transmission

January 16th, 2008, 07:11 PM	#12
460brevill Hardcore Enthusiast Join Date: Apr 2007 Location: Farmville VA Posts: 1,327 iTrader: 0 reviews	trans leak i did a c4 leak today.it was the accumalater cover making it look like the pan was leaking. __________________ i sixing 200 six with 300 hp.

January 17th, 2008, 05:09 PM	#13
7DMACH1 Newbie 1970 Mach1 11.42 Join Date: Jan 2008 Location: Phila. Posts: 49 iTrader: 0 reviews	More than likely it's not the pan leaking. The lever seals are famous for leaking. This is the seals on the levers right above the pan. They leak and it looks like the pan is leaking. Just my .02

January 19th, 2008, 10:47 AM	#15
460brevill Hardcore Enthusiast Join Date: Apr 2007 Location: Farmville VA Posts: 1,327 iTrader: 0 reviews	they have a dye you can put in your trans and ride around the block.check it with a black light and you can see where it is comeing from. __________________ i sixing 200 six with 300 hp.

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