Could this be the cause of the trans pump failure?

Man sorry to hear about your problems. Glad you guys were able to get home. I Hope it gets fixed Asap at little or no expense to you. Good luck!
 
Blackened300a said:
Would you still be able to bolt the tranny up? I would think that if its not seated it would stick out too far for the motor to seat.
Click to expand...
Absolutely

If the converter isn't fully seated you'll never be able to fully mate the transmission to the engine, if you try it will also be be seized and won't spin... Basically this is true with any automatic transmission, not just 4R70W... When correctly seated, there is approx a eighth of a inch of free play between the converter and flexplate, if the converter isn't fully seated it will be too far forward...
 
TFB said:
Absolutely

If the converter isn't fully seated you'll never be able to fully mate the transmission to the engine, if you try it will also be be seized and won't spin... Basically this is true with any automatic transmission, not just 4R70W... When correctly seated, there is approx a eighth of a inch of free play between the converter and flexplate, if the converter isn't fully seated it will be too far forward...
Click to expand...

I have gotten several transmissions from people who have tried to pull the trans up with the bolts and broken the housing. As a matter of fact, some pretty reputable shops have done it and I know that for a fact ;)

It's sometimes a real pain to get the converter fully seated on these things and the way to do it isn't by trying to force it with the transmission bolts. That won't work because the reason it isn't seating is because the 'flats' on the converter hub are not aligning with the 'flats' on the pump. Force it and something is going to break.

There was a very recent post about someone having difficulty seating a converter and having to stand it on it's tail and using a dead blow hammer. I can honestly tell you that I have had to do that as well. Sometimes the parts are so tight of a fit across the several pieces that need to mate that it seems like it isn't going to go. The reason for the dead blow isn't to beat the thing into submission, it's to use that blow to help align things so that they will go. Even though the fit might be REALLY tight, you can tell the difference between when it isn't aligned and when it is but doesn't want to go. That isn't something that I would ever suggest for anyone who isn't really, really familiar with what they are doing. Someone in that position might beat on it when it isn't in position and break the hell out of it.

I don't think there is any way that this is because of assembly in this instance. As was stated earlier, when it's put together wrong you won't be driving the car that way. If the clearances are so loose that it can be forced then the real damage is done when they try to start the car.

Darrin
 
Hey Darrin, any idea why it failed? I had a rotating vibration since I got the car back with the new engine and I had a drivetrain vibration at 60-65mph the whole ride to NC. It started whining really loud but it was working. My fluid was fine, no bubbles or burnt smell. I also had the fluid flushed a week before I left and used Castrol Mercon V. It wasnt overfilled and it was shifting fine for over 1000 miles until the whining noise started.
Yesterday when I started the car the transmission was quiet and shifted fine until it warmed up. Then the noise started again. We can also feel a slight chatter when slowly accelerating.
 
Man, there are so many things that it might be. You don't even know at this time if the root cause is in the transmission or not. It's hard enough sometimes figuring out what happened even when you have all the parts on hand. I wouldn't even want to speculate in all honesty.

Darrin
 
Update.....

Today they pulled the tranny pan down and found no metal to speak of on the magnetic pickup or in the filter. Even the lollipop was still in the pan which makes me wonder what the hell the guy who installed the J-mod was doing.

They put a new filter in and topped off the fluid and I beat the hell out of the car for a 1/2 hour with zero noises or issues. We even cut the filter in half to see what would be in the sock and it was immaculate.

I now have no idea what caused the whining noise or what the issue was. I would think clogged filter or even air getting past the filter, but I had no air bubbles in the fluid, no smells and no burnt issues.

We are both stumped on this and have zero clue what happened. Yesterday during the test drive when it warmed up it started whining really loud, today they had it running for a half hour and even took it around the block a few times before I took it for a hard ride and no issues. :confused::confused:

Good news is that all it cost me was a filter and some fluid and not a pump, clutches or even a full rebuild. I plan to drive the car some more to make sure that it don't come back. He even put a dial indicator on the converter and its not wobbling or causing a vibration and made sure it was seated. If it wasn't seated I don't think I would have made it out to Charlotte and then made it 7/8 of the way home before hearing a noise.
 
I wonder if the last guy in there didn't just leave the bobber. I wonder if he left the o-ring from the old filter in there too. That might have caused the problems you were having.

Darrin
 
Darrin said:
I wonder if the last guy in there didn't just leave the bobber. I wonder if he left the o-ring from the old filter in there too. That might have caused the problems you were having.

Darrin
Click to expand...

I had the J-mod done about 4 years ago. Its odd the problem started now. I hope thats the last of my tranny issues.
 
Glad it's fixed. Amazing how good a pan drop is. Funny that the loli was still in there! That gets put in at the factory to keep crap out of the pan from entering via the dip stick hole.

I hope it stays perfect. I like to do a pan drop every year myself. (after of course grenading my last trans in my CV)
 
Paul, I hate to ask this, but since you found the baby-rattle still in the pan, are you SURE the j-mod was even done? Mighty strange someone putting the lollipop back in.

On a second note, it's possible as Darrin suggested that the filter was loose and sucking air...it might have jostled when the motors were being swapped and that's why you never had the problem before.

Anyway, it's always nice when the simple (and cheap) fix works!
 
ea35c81d.jpg


All is still fine with the transmission.
 
You must log in or register to reply here.
Back
Top