727 Transmission

[Crumley]

Gents:

I currently have a 64 Plymouth Belvedere build thread in the restoration section. My current plan is to run a 440. I have found a 727 transmission build for drag racing. It has a reverse valve body, trans brake, aluminum drum and 10" convertor.

I posted this question in the restoration section but figured I should post here also. How street-able will this transmission be? The car I am building will spend most of its time on the street, might see track time once or twice a year. Is it worth installing it in a primarily street driven car?

 

[not so famous bob]

Gents:

I currently have a 64 Plymouth Belvedere build thread in the restoration section. My current plan is to run a 440. I have found a 727 transmission build for drag racing. It has a reverse valve body, trans brake, aluminum drum and 10" convertor.

I posted this question in the restoration section but figured I should post here also. How street-able will this transmission be? The car I am building will spend most of its time on the street, might see track time once or twice a year. Is it worth installing it in a primarily street driven car?

don`t think I`d run an alum. drum on the street very much.

 

[Dodge 330]

Aluminum drum will require frequent fluid changes. They aren't a street friendly mod.

 

[mmissile]

Put a turbo-400 in it.

 

[mopar 3 B]

Put a turbo-400 in it.

Got real

 

[Crumley]

Gents, thank you for the input.
I guess the 727 I was looking at will be sold to someone else.
mmissile, I have debated a turbo 400, but that would require additional modifications to the transmission tunnel.....but, I am not above making that modification.
I ran a turbo 400 behind a 468 powered 55 off brand car that took all the abuse that I could throw at it. I see no problem with mating on of those up to a MOPAR. I know this transmission can take a lot of abuse.

 

[HEMI-ITIS]

IMHO,keep the pushbutton trans and build it to the highest HP level you will EVER need.

 

[mmissile]

Won't live behind torque, weight, and traction.

 

[dvw]

Won't live behind torque, weight, and traction.

Really. And what power level have you broke one at? I run enough power through a push button to go 9.0@ 3350 lbs. well over 350 passes. Or how about 9.60@3800 with a trans brake? The trans that ran in my 10.30@3400lb car went 1000 passes w/o freshening, stock parts except valve body. Easy to build a push button that will do the job. To the original poster. I have cores and could build you a 65 trans that would use a late model converter and standard slip yoke driveshaft if you desire. Or give you the necessary specs to build one.
Doug

 

[HEMI-ITIS]

I will NEVER give up my pushbuttons!!!

 

[HEMI-ITIS]

Won't live behind torque, weight, and traction.

FWIW,my heap tips the scales a little under 3900 lbs. With a mere 12 lbs of boost it's been 9.5's at almost 145.I also street drive over 1500 miles a year and a few trips to the track. In my experience it has been 5 years since the trans and engine has been freshened.

 

[68 HEMI GTS]

Sounds like a decent trans, just swap the front drum out for a steel one. Someone will buy the alum drum.

 

[66Satellite47]

Can't imagine why going to a TH 400 over a 727. Both are stout. A 727 is a great transmission. The aluminum drum may not be the best deal for the street, but a stock steel drum is surely adequate for up to 600 HP. Good luck.

 

[Hanover Mopar]

I will NEVER give up my pushbuttons!!!

X2

 

[Roughbird72]

Can't imagine why going to a TH 400 over a 727. Both are stout. A 727 is a great transmission. The aluminum drum may not be the best deal for the street, but a stock steel drum is surely adequate for up to 600 HP. Good luck.

Everything has it's limitations, but for most of us the 727 will work just fine.
I wouldn't think about going to a TH400 unless i had something that was making big HP with a power adder.

 

[66Satellite47]

I may be uninformed, but I can't believe a TH 400 is any stronger than a beefed up 727. I have seen both insides.

 

[HEMI-ITIS]

Everything has it's limitations, but for most of us the 727 will work just fine.
I wouldn't think about going to a TH400 unless i had something that was making big HP with a power adder.

What makes you think with the right parts that a 400 is stronger than a 727?

 

[moparpoor]

No reason a 727 can't handle what you throw at it. I built my first 727 back in 2001 after spending a lot money with a builder with very poor results. This is a little out of the ordinary. I built this trans with good soft parts and spent a lot time building it correctly blue printing it so to speak. It's been 15 years 4 cars 1 small block 4 big blocks from 500hp to 650hp 8 converters 3 trans pans 1 je bell housing to adapt from small block to big block. Only service this trans has seen is fluid and filter changes and still pounds hard!! Key is good parts and thorough detail build!

 

[Roughbird72]

What makes you think with the right parts that a 400 is stronger than a 727?

Even the few competitive drag radial Mopars don't have 727s & SS/AH cars show the limits of the 727. If you build both with the best parts available, the 727 won't handle the HP a TH400 will. Let alone the safety aspect of buying an SFI case.

I did say big HP, i doubt many of us will build something in excess of 1,000hp.

 

[mopar 3 B]

I will keep the off breed stuff out of my street driven Mopars. They can be expensive enough to keep on the road without getting stupid about it. Remember this was to be a mild street build.