There are 904s out there in cars running 8s and leave with the wheels in the air...

if you say you will NEVER put a GM trans in your mopar, than you are never going to have a fast mopar...

its really the simple fact that a 727 can not be built to handle the same power levels, we have proved in 100 post previous to this one that you can make the 727 safe with the billet drum lba valve body and proper sprag

gearsets are not as strong, shafts are not as strong, they dont take the line pressure needed in some applications AND the most important reason imo is that you CAN NOT get a convertor to work in a true high horsepower application.

not enought convertor depth to get proper pump angle


Mr Cope and Mr Allison are friends of mine, and they both will agree. At a certain point, it doesnt make good sense

With the arguements you are making, Josh, the turbo 400 would eat power. Pro trans has been making record holding torqueflites for years. But, going back to what Josh brought up the converter ran in a Pro trans is deeper. A simple midplate made thick, fixes this problem.

I really wish guys would figure this one out. It is not the 727 designs from Mopar that blow up. If you drive it in drive with a ton of power yes. Some aftermarket valve bodies that we all used for years caused this phenomenom. They decided Low Band Apply was not necessary in race applications. Well many floarboards, feet and tranny cases later we know better. The sprags and drums from the aftermarket are better. The billet drums do not blow up. But, if you had the low/reverse band applied the drum wouldn't spin 15,000 RPM and blow up.

400 turbo trans were considered junk until they went spragless. The big issue is 1,000's of people buy 400 turbo's and race them. Only hundreds race the 727. So there is very little out there to prove the 727 can handle 2,500 HP. Where are you gonna find the diehards that want to run a 727 that can actually make that power. I think it can be done. But, I don't ,make that kinda power to prove it. Chrisman runs a blown Promod but 4.40's is not enough power to really say "Hey we have tested it to the extreme. I have seen fairly basic aftermarket parted powerglides handle that. Here is why I say this. There are many Pro flites that are using modified stock 904 parts running behind engines making over 1,000 HP and have the ET to back it up. Put the same trans behind a but kicking SS Hemi and they sometimes give up. The 727 is lightyears bigger internally and with the few aftermarket parts needed can handle 2,000HP IMO. But, there are some other parts that need upgrades to really get over and beyond that. Here is the real deal HP does not break transmissions. Torque and tire shake is what tears out transmissions. So if you have a perfect setup it is hard to tell what you can get away with.

Leon

I will never give up my pushbuttons

As far as the "time bomb" argument...ALL automatic transmissions can explode; that's why NHRA requires diapers/shields on all of them.

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THANK YOU !

because there is more aftermarket support and demand for it

For the average 9 second and slower car, a torque flite in a Mopar is a no brainer. Faster that that, the gear ratios become the desired attribute. Way faster than that, and most oem type automatics are your least favorite selection. As has been proven many times, they all need the equivilent amount of $ to work. Drums, expensive converters, input shafts, gearsets, cases and on and on. They all have their problems. Is one FASTER than the other: Yes. But in a 7 round race, in a well sorted out 10.50 car, who cares? That's what shoe polish was intended for.

BECAUSE IT HAS A TURBO INSIDE IT .

thank you for the input so far.

I am looking at 850-1000 hp. (not 2000hp)
STreet STrip Car

Fairly heavy mostly all steel B body
Procharger car

I am not a tightwade but I would like to pay the price and get the correct tranny for my application once
regardless if it is a gm tranny or the 727

So the technical reasons would be great