727 problem

[pandamarie]

Today I took my 69 charger out to my in laws and when I got ready to leave the car started fine  put it in gear and nothing, after sitting there idling for about 2 minutes it kicked in gear(manual valve body) but felt like it was locked between 1st and reverse, put it in 2nd and it took off for about 100 feet then did the same thing. once it got back into gear I left it in 2nd and drove home while it was making a noise like the converter bolts had backed out.
After letting it cool a bit I checked the converter bolts and they were all tight, started the car up and nothing, no forward or reverse.
This trans is only a little over a year old and probably has less than 1000 miles on it.
Manual valve body 3000 stall converter, large pan and external filter setup with extra large trans cooler. anyone have a guess as to what might be the problem?
go to yank it out next week after im back from a wedding.  This trans has worked perfect for the time it been installed till today.

[tactransman]

Is it a reverse pattern manual valve body? It sounds like you lost the low sprag (major trouble)
Drop the pan first before you take it out to see what is in it.

[pandamarie]

No its a forward shift manual valve body. will the sprag make eveything just quit? I checked the end play on the crank and found only.005 play so thats good, I was thing I might have ruined the thrust bearing and ended up tearing the pump up. Is the bolt in sprag worth the money to put in? This car is a 550HP daily driver and gets down shifted alot and slammed around corners along with some straight line juants when not just driving around from point A to B.

[tactransman]

Does it have low band apply?

[tactransman]

After reading your first post again I see that you did not have reverse either. Drop the pan, it will tell you if you have big trouble.

[tactransman]

will the sprag make eveything just quit?

No, it will bind things up though. It will not effect reverse at all.

[ShelbyDogg]

Be carefull, if that rear sprag is out, a hard launch could blow your trans up.   Any auto parts store can get the replacement sprag parts or better yet, the bolt in sprag. 

PS. Never do a water burnout in 1st gear. Heavy cars should start in 2nd then go to 3rd. Light cars, like mine, started in 3rd gear.   Watch the water box at the race track, all of the Mopar racers know how to come out of the water, if they don't want to shock the sprag.

Rob

[pandamarie]

It does have low band apply. I have never done a first gear burnout in this car as I dont take it to the track it just one of my daily drivers, it will smoke the tires  when I do a little street racing now and then if I dont pedal it. The car is stuck in the driveway blocking my 6 pack challenger in so it will be a pain to drop the pan. what should I be looking for in the pan if the sprag is shot and if thats the problem who makes the best bolt in sprag?
After the first time it wouldnt move and then decided to work enough to get me home it wouldnt go down into 1st without locking up and I had no reverse just 2nd and 3rd.

[ShelbyDogg]

If it's the sprag, the tranny has to be pulled and completely taken apart to get to it. It is the last part in the case before the tailshaft. The bolt-in sprag (replacement) is just a drilled and tapped stock piece that the tranny warehouses sell but an aftermarket bullet proof one can be purchased that has double the amount of rollers in it.

Once you pull out all of the drums, if the sprag popped, you'll see rollers and springs all out of order in the race.

Something must have gone wrong the last time you put it away. Anything come to mind?

[pandamarie]

Ive had this trans in the car for a little over a year and have had no problems with it at all. the only thing that I can think of that has happened latly was a little street race with a yamaha 750 3 days ago, he pulled the front end and I spun in first for about 10 feet then hooked up and stayed right beside him even after missing second(still using the stock shifter) hit 110 before we both let off, missing second was the only thing that I have screwed up in the last few day, the trans always runs cool never over 140 until  yesterday when whatever let loose then it went up to 180 in the 1 mile it took me to get home.
I am draining the pan now and so far nothing but clear(red) clean fluid is coming out a slight burnt smell but nothing like the last meltdown. I will be pulling the pan tomorrow since im driving for a wedding in a few hours and will let you know more then.

[ShelbyDogg]

You might have broken the pump.  It sounds like you need to pull it and put in your spare 727.  Everyone has a spare for their daily driver, right?

[pandamarie]

Scattered my last spare last year while this one was being rebuilt. Oh well I can drive the 440 6 pack challenger now, the front end rebuild will just have to wait a few extra weeks.

[pandamarie]

I finally got my tranny builder to get to my chargers transmission, the bad news is the pump broke and took out the torque converter, the good news is the rest of the trans still looks like new. I have almost 1000 miles on this trans(hard miles) and my tranny builder or I cant figure out why the pump would go, there was nothing in the pan, it was clean and I put on an external filter when the trans went in last year and cut it open and it was clean too.
 The start of this problem was racing a 750 yamaha and missed 2nd and went right into 3rd at about 6500rpm(still using the stock shifter soon to be changed) good thig was I stayed beside him to 110mph after that it went about 2 miles and that was it.
Has anyone ever had this happen??

[ShelbyDogg]

It sounded like a pump due to your high temp.  I never broke a pump. Yours may have been already cracked and you were just driving on borrowed time.   I always make sure that the pump is all the way in before I put in the trans.  If somebody wasn't carefull, they could have cracked it while installing  it.   Who would know besides the guy that did it?  That's why I do it myself.

Did anyone see the Discovery Channel's Jesse James go to Iraq to build a killer Hummer?
Those guys didn't know if the torque converter was in all the way, cracked the pump, and caused the whole show to fail.  I knew from the start that they never put a TQ in a trans before, just by what they said putting it in.