Rear main Seal-Again
Thread Starter
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Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
Rear main Seal-Again
The rear main seal on my '94 F150 5.0 is leaking.
I am not able to do this job myself right now and have spoken with a man at a local repair shop about doing it for me and he feels that I would be better off waiting, if I can until my transmission fails to change the seal due to the labor cost, he feels that most certainly my transmission will fail around 150k miles (it has 119k now) I have no indication of failure right now as in poor shifting, leaking, or any weird noises at all, I know the overdrive automatics aren't known for longivity, but I think mine, taken care of will easily go over 200k without trouble-I haven't even had to put the Mercon V fluid in yet.
He told me about a think called a crankshaft saver that would most likely need to be slipped over the end of the crankshaft BEFORE the new seal is installed-anyone heard of this?? he said more than likely the old seal has caused a grove in the crank, and if the crank saver is not installed the new seal will most likely leak as well.
He told me that this new type one piece seal that Ford uses now can be accessed by removing the flywheel and there is no need to remove the oil pan in order to change the seal-is this true?? I hate oil leaks!!!!! any comments/suggestions?? Thanks!!
I am not able to do this job myself right now and have spoken with a man at a local repair shop about doing it for me and he feels that I would be better off waiting, if I can until my transmission fails to change the seal due to the labor cost, he feels that most certainly my transmission will fail around 150k miles (it has 119k now) I have no indication of failure right now as in poor shifting, leaking, or any weird noises at all, I know the overdrive automatics aren't known for longivity, but I think mine, taken care of will easily go over 200k without trouble-I haven't even had to put the Mercon V fluid in yet.
He told me about a think called a crankshaft saver that would most likely need to be slipped over the end of the crankshaft BEFORE the new seal is installed-anyone heard of this?? he said more than likely the old seal has caused a grove in the crank, and if the crank saver is not installed the new seal will most likely leak as well.
He told me that this new type one piece seal that Ford uses now can be accessed by removing the flywheel and there is no need to remove the oil pan in order to change the seal-is this true?? I hate oil leaks!!!!! any comments/suggestions?? Thanks!!
Senior User
Joined: Jul 2005
Posts: 226
Likes: 0
From: PA
You're looking for an oil seal sleeve. The biggest brand name is called Speedi-sleeve, although for automotive applications it could be a different brand or trade name.
IMO, if you've kept your auto tranny well cooled under heavy load, and kept the fluid clean and changed out, it could last quite a long time. Unfortunately many people don't do any of that kind of maintenance, and bring down the lifespan significantly.
Dave
IMO, if you've kept your auto tranny well cooled under heavy load, and kept the fluid clean and changed out, it could last quite a long time. Unfortunately many people don't do any of that kind of maintenance, and bring down the lifespan significantly.
Dave
Thread Starter
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Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
I keep my transmission well maintained and do not tow often.
My '94 F150 SuperCab has the factory auxillary transmission cooler plus the one in the radiator so I feel its kept plenty cool, I happen to know the history of my truck before I bought it and it was always well maintained.
I have a Nephew that has a '93 E150 van and his trans lasted 225K and was used to tow a travel trailer most of the time before he bought it and HE didn't ever do any maintenance on it.
Anyway my thinking is to have a reputable shop remove the trans (and install new seals IN IT front and rear while its out AND replace the rear main in the engine with the addition of the crank saver thing and be done with it.
I am going to start anouther thread to ask what the best type/brand of shift improver kit would be good for my setup. Thanks!
My '94 F150 SuperCab has the factory auxillary transmission cooler plus the one in the radiator so I feel its kept plenty cool, I happen to know the history of my truck before I bought it and it was always well maintained.
I have a Nephew that has a '93 E150 van and his trans lasted 225K and was used to tow a travel trailer most of the time before he bought it and HE didn't ever do any maintenance on it.
Anyway my thinking is to have a reputable shop remove the trans (and install new seals IN IT front and rear while its out AND replace the rear main in the engine with the addition of the crank saver thing and be done with it.
I am going to start anouther thread to ask what the best type/brand of shift improver kit would be good for my setup. Thanks!
Cross-Country
Joined: Oct 2005
Posts: 91
Likes: 1
yes,
You can access the rear seal without removing the oil pan. Pull the tranny back, remove fly-wheel and replace rear seal. Don't forget to replace the front seal in the tranny now that it is pulled. Are you sure its the rear seal? The intake mainfold at the rear may be leaking or the valve cover gaskets?
You can access the rear seal without removing the oil pan. Pull the tranny back, remove fly-wheel and replace rear seal. Don't forget to replace the front seal in the tranny now that it is pulled. Are you sure its the rear seal? The intake mainfold at the rear may be leaking or the valve cover gaskets?
