What are the differences (if any) between a 727 and a 904 ******? Are the internals interchangable or are they completely different? Been looking for a good deal on a 727 and stumbled across the 904, it would be perfect if it works.
Lots more weight! I can lift a 904 but ******ed if I can lift a 727! Basically the 904 is a lighter , smaller and lower rated trans but it all depends what you are going to do with it? The 727 on the other hand is supposedly unbreakable in most situations. swifty
In stock form the 904 is about maxed out with a stock or slightly warmed up 318. 727 can handle a big block w/o problems. The 904 bell comes for a s/b & the /6. 727 is available for small or big blocks, depending on original use. 904 uses less HP than a 727.
I've been looking locally for a 727 without much luck. It's going behind a blown 392. Mild combination for street use. the car is a 34 ford, and I am aiming for it to be relatively light, no numbers just being conscious of total weight. Would a 904 work in the application or am I better off waiting for a 727?
Frank, If you were within a road trip, I would make you a deal on a "should be good", SB MOPAR 727 that is out in my garage. It was my Brothers and I ended up with it after his accident/death. ****er has been sitting around since '91 or so. he thought about installing it in his '70-1/2, T/A 340 6-Pack, but never got around to even getting it back on the road before he left me. pdq67 PS., I finally unloaded his A833 4-speed after many years also...
yes hold out for the 727 it would be much better for you application. are you using the Hot Heads adapter for it?
Yes, I have a Hot Heads adapter. Honestly when i was coming up with the combination I thought that there had to be millions of 727's kicking around, it seems that the s**** guys beat me to them a couple of years ago. And here I thought that 727's were still relatively 'new'.
I don't know where you live but, you could call John Cope and have him ship you whatever you need Good dude http://www.coperacingtrans.com/
I love my 727. Remember that they can come in A engine and B engine bellhousings, and both will need an adapter like the one from Wilcap: http://www.wilcap.com/Hemi.html#392318 You will need the 727, and depending on the power you may need one of the heavy duty upgrades (see links below). In case you are looking for Parts: http://www.transmissioncenter.net/727transmission.htm I highly recommed this book: Torqueflite A-727 Transmission Handbook, Munroe, HPBooks-1399 http://www.overstock.com/Books-Movi...-52C1-DF11-98FF-0019B9C043EB&mr:referralID=NA
Interesting, he says he has a 904 trans that can hold 500 HP (https://www.coperacingtrans.com/product_info.php?cPath=21&products_id=38). I suppose it could be true, but I like the 727 if you wnat something that can handle a mild 392 hemi. If you got the cash to burn, it would be interesting to get the 904 just to see if it works?
Hi Frank, Find a 727....the 904 isn't going to work. Give me a call on Monday, I'll see if I can find one for you. Rocky Pirrone JoePirrone.com
A 904 reportedly uses 40 HP less to operate. I personally think that is an overstatement of the case although I have no doubt it is less than a 727. late 904 have lower first gear (and second as well. ) than normal 904s or 727s. 2.45 vrs 2.76 I believe is right . There is no BB case for 904s. I have helped do them with a ultra bell but it is to me a half finished piece and lacks a lot it could have with very little effort. i am convinced there is an easier way to do it. The 904 when done well will stand a lot. I sit down and do the math for area of friction sufaces i the clutch packs and machine away on the clutch parts till i can get enough plates and steels in to equal the area in a HP 727. Then it s up to the task (have used it to about 650 HP in a rail. ) torque converters are different as well. 727 is the eaqsiest build . For a smallblock i would do a 904 though every time. For a BBlock the 727 is easier and probably ore reliable. The machine work while not difficult is difficult to get done and in some towns would be impossible. Because I do it in house we get away with it. So if you have a BBlock moparthe 727 is the most practical. If you have a small block either will do a good job with minmal fuss. don
I like John Cope, too. I've got one of his 727's behind my small block. Unlike others, I wouldn't have a problem putting a 904 behind some HP, but since they didn't come in big blocks, it seems waiting for a 727 is your best option. One thing for sure, a Cope built 727 will be bullet proof. Even a very mild one. Don't let all the options and upgrades scare you; they're mostly for ******** racing applications. We ran super stock hemis with 727's that ran in the 9's with nothing more than a modified valve body and big converter.
904 are S6/LA-SB ******s. 727s are LA-SB and LA-BB. 727 takes 25 more HP to turn high gear than a 904. I well built (with modern materials) 904 will take 450 HP. More than than, go 727. The SB 727 and SB-904 are slightly diff. size wise. In a early A body (63-66 Mopar), the 727 will hit the tunnel top, where the 904 clears. I'm putting together a 360/904/8.75 combo for an early A body Mopar. My 73 Dart sport is getting a 340/727/8.25 combo.
Guys, Thanks for all the input, I'll have to wait....... Rocky, How the hell have you been? I think a trans shipped from your way would be a killer. How's the racing going, miss the FC's at all or is the Willy's doing it for ya? That is a good looking ride.........
Will a 904 work? Sure it will. It just cost more to make a 904 live with high hp than it does to make a 727 live.
Unless your adapter is specifically designed for the 904 you do not get a choice. The starter sits about ½ higher on the 904 vs 727 and will hit the block. The only way to properly mount a 904 on any early Hemi is to rotate the entire bolt pattern on the adapter CCW thus putting the trans on an angle, or, start grinding away on the block and still have to modify your adapter. Can it be done? Yes. Is it worth the effort? Your call. .
I don't know much about transmissions, but may be able to point you to another source. FMC made motorhomes from 1973-1976 and they used 440 chrysler marine engines with 727's in a pusher configuration. I know my 1973 model will make 0-70 pretty damned fast, and it's pushing 29 feet of loaded down motorhome! there's a guy in santa clara california that supplies parts for these motorhomes, company is called RVS. He might be able to find a 727 for you. y'all have a good day, Keith
I've got a 727 out of a 68 motorhome (318), it has the emergency brake on the rear of the tail shaft. How hard is it to get that changed out to a regular tailshaft? Is this something a guy with no trans experience can do, or is it a job for the ****** shop?
Actually, with my regular early hemi to sb mopar adapter and the correct starter, very little grinding is needed on the corner of the block to make a 904 fit a 392. IMO, unless you absolutely need the weight savings and reduced rotational m*** of a 904.......go with a 727.
Does anyone have any links or resources on the 727? I'm looking for more technical articles on id'ing and rebuilding these ******'s. My searches don't turn up anything of value. Thanks......
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