tranny oil

1972madison · June 19th, 2007, 01:36 PM

I have a tranny oil leak, would could be leaking ?

American Lead · June 19th, 2007, 06:52 PM

on my 55, The side cover, pan, and selector shaft seal were all leaking, sometimes a good service manual can give you some good ideas of what to look for, good luck and let me know how it goes, Next time I am out I will ask some people.

redoldsman · June 19th, 2007, 08:06 PM

Is it leaking from the front or the back of the transmission. You may need to put some clean paper down under it to see. If it is dripping from the front, it is probably a front pump seal. The seal is not expensive but you have to pull the transmission to change it. If it is near the rear, it would be the tailshaft seal. Then you just have to pull the driveshaft to replace it. It has been my experience it will more than likely be the front pump seal.

Good luck.

1972madison · June 19th, 2007, 10:01 PM

Well its leaking near the middle of the car.

joe_padavano · June 20th, 2007, 12:30 PM

Quote:

Originally Posted by 1972madison

Well its leaking near the middle of the car.

There are a dozen different leak paths, not counting an unlikely crack in the case. I'm afraid you'll need to be more precise than that if you expect any useful responses. When the question was asked about the front or back, that meant the front or back of the TRANSMISSION, not the front or back of the car.

It would also help to know the type of transmission (and please don't just say "automatic") since different GM transmissions have different leak points. Potential leak points are the input shaft/torque converter seal, cooler line fittings, shift linkage shaft, kickdown cable, electrical connector plug, dipstick tube, pan gasket, modulator, governor cover, speedometer cable, trans oil pan gasket, and ouput shaft.

And just be be certain, we're talking about reddish ATF, not black oil leaking past the rear main seal, right?

1972madison · June 20th, 2007, 02:59 PM

yes pink/red oil

American Lead · June 21st, 2007, 03:08 PM

The best thing to do is to clean your transmission with a pressure washer or rags, then wait over night, and get under the car and see if you can find a path of trans fluid on the trans, and figure out where it is leaking from. If it is an abnormally large job to fix, it may be easier to dump some Lucas transmission fix and see what happens.
Let me know how it goes for you

1972madison · June 21st, 2007, 03:31 PM

sure ill let you know what happens with it, its in the shop right now and i told them too look at that,

June 19th, 2007, 01:36 PM	#1 (permalink)
1972madison Member Join Date: Jun 2007 Posts: 36	tranny oil I have a tranny oil leak, would could be leaking ?

June 19th, 2007, 06:52 PM	#2 (permalink)
American Lead 2Blue 55 Join Date: Dec 2006 Location: Nova Scotia, Canada Posts: 455	on my 55, The side cover, pan, and selector shaft seal were all leaking, sometimes a good service manual can give you some good ideas of what to look for, good luck and let me know how it goes, Next time I am out I will ask some people. __________________ Classic cars are my drug of choice

June 19th, 2007, 08:06 PM	#3 (permalink)
redoldsman Proud Viet Nam Veteran Join Date: Dec 2006 Location: Rowlett, TX Posts: 469	Is it leaking from the front or the back of the transmission. You may need to put some clean paper down under it to see. If it is dripping from the front, it is probably a front pump seal. The seal is not expensive but you have to pull the transmission to change it. If it is near the rear, it would be the tailshaft seal. Then you just have to pull the driveshaft to replace it. It has been my experience it will more than likely be the front pump seal. Good luck. __________________ redoldsman

June 21st, 2007, 03:08 PM	#7 (permalink)
American Lead 2Blue 55 Join Date: Dec 2006 Location: Nova Scotia, Canada Posts: 455	The best thing to do is to clean your transmission with a pressure washer or rags, then wait over night, and get under the car and see if you can find a path of trans fluid on the trans, and figure out where it is leaking from. If it is an abnormally large job to fix, it may be easier to dump some Lucas transmission fix and see what happens. Let me know how it goes for you __________________ Classic cars are my drug of choice

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June 19th, 2007, 10:01 PM	#4 (permalink)
1972madison Member Join Date: Jun 2007 Posts: 36	Well its leaking near the middle of the car.

June 20th, 2007, 02:59 PM	#6 (permalink)
1972madison Member Join Date: Jun 2007 Posts: 36	yes pink/red oil

June 21st, 2007, 03:31 PM	#8 (permalink)
1972madison Member Join Date: Jun 2007 Posts: 36	sure ill let you know what happens with it, its in the shop right now and i told them too look at that,