727?

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RTom

Depressingly A-Bodyless..
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My Dad and I were talking the other day about his 67 Dart GT Convertible that he is working on and we started talking about the engine to go into it. He was wanting a heavy duty transmission for it and was wondering if any 727's would bolt up to a slant six and I wasn't sure, so I figured I'd ask the pros!

Thanks guys!
 
I'm assuming that they'd be the same size then and fit in an a-body without modification?
 
Why does he want a 727 behind the slant? Less power? Worse gas mileage? Lots of guys running 250+ hp with the 904 with no issue.
 
Cannot imagine why you'd want to put in an unnecessarily heavy, unnecessarily power-hungry transmission. What your dad wants is a properly-built (or -specced) 904.
 
I'm assuming that they'd be the same size then and fit in an a-body without modification?

They should bolt in the same as a small block 727 would which means you would have to find a different driveshaft but everything else should swap over.
Like Grinder says though,why bother? unless you're installing a big turbo,a linelock,and slicks,or planning on pulling a 30' travel trailer with it,you're just adding weight to the drivetrain and to the car for no reason.
 
i agree with these guys ...no point a 904 can be built to put up with plenty of abuse..some guys evn run adapters to put them behind big blocks
 
They should bolt in the same as a small block 727 would which means you would have to find a different driveshaft but everything else should swap over.
Like Grinder says though,why bother? unless you're installing a big turbo,a linelock,and slicks,or planning on pulling a 30' travel trailer with it,you're just adding weight to the drivetrain and to the car for no reason.


FALSE.... slants have a different bell housing just like small locks and big blocks...

they did make a 727 for the slants as mentions in some vasn and trucks...

there is no reason to go with the 727 as the added weight and power loss... the 904 can hold anything a slant even a blown slant could throw at it...
 
FALSE.... slants have a different bell housing just like small locks and big blocks...

they did make a 727 for the slants as mentions in some vasn and trucks...

there is no reason to go with the 727 as the added weight and power loss... the 904 can hold anything a slant even a blown slant could throw at it...


is the 904 called a torqueflite too? i've never had one, i've always had the 727. the build sheet on my 72 swinger /6 says, "torqueflite transmission package, $177.75". i always heard that the 727 comes in some trucks and vans just like u said, but i didn't know if they ever made a 727 for /6 abody... not tryin to hijack, but i figured this was good time too ask since we were on the subject lol.
 
FALSE.... slants have a different bell housing just like small locks and big blocks...

they did make a 727 for the slants as mentions in some vasn and trucks...

there is no reason to go with the 727 as the added weight and power loss... the 904 can hold anything a slant even a blown slant could throw at it...

I know they have a different bellhousing and I did'nt say he could use a small block 727.The meaning I was trying to get through is that the slant six 727 will bolt up to the crossmember,linkage,etc just like a small block 727 would.
 
904's are great they are lighter and can handle lots of power my umcles valiant rums low 11's high 10's on a 904
 
is the 904 called a torqueflite too? i've never had one, i've always had the 727. the build sheet on my 72 swinger /6 says, "torqueflite transmission package, $177.75". i always heard that the 727 comes in some trucks and vans just like u said, but i didn't know if they ever made a 727 for /6 abody... not tryin to hijack, but i figured this was good time too ask since we were on the subject lol.

yep TF 904 and TF 727

They should bolt in the same as a small block 727 would which means you would have to find a different driveshaft but everything else should swap over.

I know they have a different bellhousing and I did'nt say he could use a small block 727.The meaning I was trying to get through is that the slant six 727 will bolt up to the crossmember,linkage,etc just like a small block 727 would.

im sorry then but when i read it thats how i understood it...
 
A-727-RG .
I agree with those whom have opined : "why?"

They're kind of difficult to find ; I've seen exactly one in all my years ; it was in a true oddball , a 1970 Coronet New York Taxi ( WN41C0A ) . 225 HD , 727-RG with Low-Gear Block-Out ( just like police cars had ) . Rusted to its lower "C" pillars .

What made "New York Taxi Package" cars so different ? The rear floorpans ; they were deeper , as N.Y. had floor-to-roof requirements . The cars were shipped across town to Chrysler's "AmbleWagon" facility ( same shop that modified FX cars and performed Ambulance modifications ) , where the rear floorpans were removed and replaced with deeper units .

Off topic ...

Never-the-less , if you're hell bent on putting an energy-absorbing leach behind your 225 , look for an A-727-RG .
 
....but if the dude WANTS a 727, then no other reason is good enough to talk him out of it. All of yall are certainly right. But some people simply want what they want. One thing is for sure. A 727 assembled correctly and maintained correctly will outlast the owner behind that slant. I know....so would a 904. It's simply his choice, not any of ours.
 
....but if the dude WANTS a 727, then no other reason is good enough to talk him out of it. All of yall are certainly right. But some people simply want what they want. One thing is for sure. A 727 assembled correctly and maintained correctly will outlast the owner behind that slant. I know....so would a 904. It's simply his choice, not any of ours.

darn you! had to come in here and make us all look like bad guys! :iconbigg:
 
Since the 60's Mopar engines have used three automatic tranny bellhousing bolt patterns; one for the big block V-8's, one for the small block V-8's, and one for the slants. A small block V-8 727 will NOT bolt directly to a slant.

Though I have not yet done this (plan to), I am told by most local slant racers that the way to build a strong slant 904 is to remove everything from the case, then fill it with components from an A998 or 999 (the 999 is considered the strongest). Using the 999 parts you'll get 4 and 5 clutch drums and gearsets with 4 pinions.

There may indeed have been 727's in slant trucks, but I have never seen one.
 
There was a slant 727. I had one last year and sold it.
 
Ok I get you guys like 904's but if thier so great how come they never came behind a big block or a hemi? As for parasitic loss inside the 727,buy an alum drum and your now even with the 904,plus you have a stronger trans. And I think that rather than using an actual 904 behind a big block,racers simply use 904 internals in a 727 case.It's an expensive route from what I understand.
 
They never came behind the big motors because the technology and parts to make them live behind high horsepower didn't exist. Now it does. Had things been a little different, the 904 could have easily been the only three speed rear wheel drive automatic transmission Chrysler ever made.
 
Ok I get you guys like 904's but if thier so great how come they never came behind a big block or a hemi? As for parasitic loss inside the 727,buy an alum drum and your now even with the 904,plus you have a stronger trans. And I think that rather than using an actual 904 behind a big block,racers simply use 904 internals in a 727 case.It's an expensive route from what I understand.

aluminum drum on the street... lol

They never came behind the big motors because the technology and parts to make them live behind high horsepower didn't exist. Now it does. Had things been a little different, the 904 could have easily been the only three speed rear wheel drive automatic transmission Chrysler ever made.

right on the money...
 
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