I have a 727 I'd like to install in place of my 904 pushbutton. Aside from installing a floor shifter are there any other considerations?
It is a slant six A727 and will go into my '63 Dart.
Thanks,
Brad

Regarding the 727. It's longer so your driveshaft won't fit. It's probably also a slip-yoke trans. It's heavier. More parasitic drag so the car will use a little more gas and accelerate a little slower. What's wrong with your existing trans? Why not a later 904? Also, if your engine is original or otherwise has the small crank pocket a '68+ trans won't fit as-is.

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Joshua

Josh, my car has a '68 model engine. I want to swap in my hot rod engine with big cam,etc. I need a converter if I stay with automatic. It looks to me like I can just use the 727 that I have and know to be good with a good converter and go, where as the 904 will need a lot more money flung at it.
I realize it is not the optimum for performance but I am on a tight budget and want to use as much existing parts as I can.
I have considered a swap to a manual, 4 or 5 speed if I can find one at a deal. Really that would be my first choice.

I expect you'll spend as much getting the 727 in the car as you would having a converter built for the 904.

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Joshua

Is there enough room for the 727 in the transmission hump??

Richard

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Part of Tyrde-Browne Racing

Won't the 904 need more than a converter?

Charlie S has the most experience with the early 904 of anyone on the board that I'm aware of. I'd PM him or see if he chimes in.

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Joshua

Two questions.
1) What is wrong with your PB 904?
2) Do you like the pushbuttons,or not?

I run a 1965 904, with a 1964 pushbutton shifter, in my 66Cuda.
EDIT: 1964 manual shift valve body. Shifter mounted in a console between the bucket seats.

There are several options on the 904, depending on what you have to work with.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

1) As far as I know there is nothing wrong with it aside from a few leaks.
2) I like the PB904 just fine. I really like the PB shifter.

I am concerned with the cost to make it live behind the more powerful engine. Maybe it is much ado about nothing.

Then stay with that. Any thing else will cost you more. If you can build an engine, you can build a torqueflyte trans. There are a few things that you can do to "beef" up your trans, during a "freshen up", and a shift kit of some kind.

If you can find a "core" V-8 904 trans from 1968 up, you can take the complete front section of the trans drive train, and swap it into the early trans. (Do not use the low 1st gear stup, that will not fit.). There were some changes made to the lip seals and seal rings in different years so you need to match the seals, depending on the year of the trans parts.

If you cannot find a "core" V-8 trans, you can use a slant six trans, and swap the same parts, to get the later input shaft. The v-8 trans gives you one extra clutch. Nice to have, but not a necessity, unless you have a pretty stout engine, and are beating on it. If I remember right, my 66 Valiant only has the 6 cyl 3 clutch pack.

If you do not want to use the 68 up parts, it is not totally required to make the trans live, but it makes it easier to get a converter. The converter people have trouble getting the sprag with the early splines, and the converter is the single most expensive part.

All my converters are built with the late (1968) splines, and the early(1967) pilot. That way the converter will fit any combination of engin/trans, even a small block.
Early engine, early trans (with late front parts)
Early engine, late trans, (no special parts)
Late engine (with crank adapter bushing), early trans (with late front parts)
Late engine (with crank adapter bushing), late trans (no special parts)

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Thanks Charlie! That was everything I ever wanted to know about my transmission but didn't know to ask.
Brad

100% correct on the pb904 mods. You can use the later clutches & pump with the early geartrain. (the front planetary carrier & the output shaft are different- early to late). I had to make a custom thrust washer from brass as nothing stock gave me good endplay.

You can use a late model replacement "bolt-in" roller clutch- it's deeper/beefier than the early unit. You need the late reverse drum & inner roller race. Some of the bolts for the new outer sprag line up with the existing rivet hole. I had to carefully drill 2-3 new holes & tap them to use all the mounting bolts (I needed GOOD drill bits & tap from an industrial catalog- Grainger)

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63 Valiant Wagon
225 - 4 bbl