68 gtx 727 tranny replacement question

[426shaker]

Hey guys, I'm goin to be working on a 68 gtx that has a 440/727. The transmission blew up completely, not salvageable. My thoughts for replacing the transmission are a tad bit scattered. Should I look for and old one and have it completely built, buy one done from a manufacturer.?? My other question is when I have searched for trannys, I see a lot of different tailshaft lengths, How can I be sure I get a 727 that was in a b body or will be the same? I cant measure the old one because its not provided. I will need to either get a factory stock driveshaft or have one made anyway cuz that is not around anymore either. thanx for the help in advance guys.

 

[BIGSHCLUNK]

when you say blew up - you mean case damage?

 

[Funship32]

Well I'm not an A727 expert so take what I say as information but it is by no means gospel: All A/T equipped big blocks came with the 727. However some small blocks also were available with the 727. And there was also a short tailed 727 was made for certain truck models! So which to get? You'd basically want a BB 727 that is about 35 inches long, C body, B body, either and all should work. For example I put a 383/727 combo from a C body into my Dart (using the DC k frame) and it all lined up like a champ. And since you don't have a driveline, even IF you got a short tailed 727, I would think you could just have a longer driveline fabbed up. As for buying a reman'd jobber- you can do that and it would get you by w/o problem however most of those reman'd jobs are typically made using generic (aka: cheaper) parts. Having a 440 and if you are going to rod it at all, you may, again may want to think about picking one up and having it rebuilt by your local, GOOD, trans guy. It all depends on how much coin you have and want to spend.

Hope that helps.

 

[426shaker]

Yes there was case damage. The whole transmission tried to spin on the block and shattered the bellhousing. I do plan to have a local shop build it up...but I think I'm going to need a core of some sort for him to start with. Thanks for the info... that is also what I've been finding through research.

 

[68GTX440]

Tranny

Keep this in mind. As long as the 727 will bolt to the big block whether it has a long or short shaft you can take all the guts from yours if you still have it and swap them out. Chrysler transmissions are very easy to rebuild. Also if you have a transmission supply house (not a parts store) around you you can get what is called a banner kit for around $125.00 this will include clutches ALL seals pump bushing and tail bushing. Now you have a rebuilt transmission for about $125 plus fluid and saved a bundle......:headbang::headbang:

Yes there was case damage. The whole transmission tried to spin on the block and shattered the bellhousing. I do plan to have a local shop build it up...but I think I'm going to need a core of some sort for him to start with. Thanks for the info... that is also what I've been finding through research.

 

[Cornpatch MO]

Something to consider. Your GTX tranny may be built stronger than other ones , by the factory. I don't know what Ma Mopar did for the higher performance trannys. I am curious to know..........................MO

 

[67 coronet]

depends on what your final car is gonna be for.
1)cruiser,find a good core and have genero rebuild.
2)performance,find a good core and buy your own quality rebuild kit(bnm,cope racing transmissions)and have your local rebuilder install your parts.
3)high performance,buy a good quality trans as a whole.

 

[68GTX440]

If memory serves me correctly that he Hi Performance had an extra clutch in the forward drum and a couple of extra springs in it also. You would be much better using your guts from the broken one or at least comparing before you have the new one built just to be on the safe side.

Not sure if you can still get them from chrysler but the last time I rebuilt mine (1984) I did a some modifying and put hemi clutches in it and a few other tricks. Man what a difference it made in shift! Nice and solid.....

- - - Updated - - -

#1 You should built it back to what it was as far as internals. What if about the 10th or 15th time you decide to nail it for no other reason to show off, the last thing you need is to blow a set of clutches and now you can't move because the forward drum won't grab.

#2 Sure you can buy B&M or cope racing stuff but from personal experience and many many years of building transmissions you are paying for the name not quality. This has been going on since the late 80's early 90's

#3 core wrecking yard $75.00 - $150.00 Parts $125.00 Mrshift shift kit $35.00 Build yourself $300.00 or shop $600.00-up.
Or purchase performance built $1200.00 plus. You decide if money is not a problem

My .02 worth

depends on what your final car is gonna be for.
1)cruiser,find a good core and have genero rebuild.
2)performance,find a good core and buy your own quality rebuild kit(bnm,cope racing transmissions)and have your local rebuilder install your parts.
3)high performance,buy a good quality trans as a whole.

 

[426shaker]

thanks for all the input guys. Yeah its going to be a little bit before I make my mind up due to money right now. But I did find a core to work with locally. So that's a start!!