id 904 trans?

[bones427]

i want to switch out my 727 for a 904. how do i id it? was told get a low gear one and does th 6cyl. one fit a small block?

 

[70aarcuda]

/6 trans will not fit a small block ..different bolt pattern on blocks

you need a 904...converter...and a longer driveshaft...


http://www.mymopar.com/downloads/transguide.pdf

 

[67Dart273]

Why do you want to do this?

/6, SB, BB engines are all three different bell patterns

You'll need a 904 converter, slip yoke, and different length driveshaft

 

[bones427]

brian/imm said it would pic up a tenth to a tenth and a half.

 

[805moparkid]

727's are a little bit more of power eaters than 904's

 

[R5P7Duster]

IIRC 4 speeds and 904's have the same length drive shafts.....

 

[crackedback]

brian/imm said it would pic up a tenth to a tenth and a half.

And he's right.

IIRC, a 1980's /6 trans would have the low gear set in it. You can look around and usually find the sets for sale in the 50-100 range.

The drivers side trans pan flange will have numbers stamped in it.

 

[green1]

A local racer went from 727 to 904; picked up 1/3 of a tenth.

 

[805moparkid]

And he's right.

IIRC, a 1980's /6 trans would have the low gear set in it. You can look around and usually find the sets for sale in the 50-100 range.

The drivers side trans pan flange will have numbers stamped in it.

what benefits do you get with the low gear first?

 

[70aarcuda]

the car will launch harder with the lower gear set...2.74 vs 2.45

problem is the rpm drop into second gear....or you can get the complete low gear set of 2.74/1.54...vs 2.45/145

just need to find the right donor trans

 

[bones427]

sounds like more work than i wan't to go threw.