I have a 1973 challenger 727 tf. I built the engine and it's making 442 hp and 468 tq at the crankshaft . Put the engine in behind the old 727 and she was doing fine but wasn't keeping up with the new engine set up ( shifting alil late at wot). So I decided to pull her out and do a shift kit and put in new racing clutches in her. Now I know this is strange but when I took the valve body out and saw the tube running across the valve body I thought nothing of it but after doing alil research and reading on the valve body from My 727 rebuild book I saw that I had a lockup valve body. Now I'm sure (positive) that the transmission is a non lockup 727 from the shaft at the front of the trans being groved all the way to the end (the a518 being the lockup trans having at the end a smooth .

My trans was fine and didn't have any problem except the slow shifts at wot . At low speeds shifts are nice and smooth.

How does this work?

Should I keep this valve body on or get the non lockup?

thanks ahead of time guys.

 

As a side note, one of my Imperials has a lockup transmision. When I had it rebuilt, it had slow shift from 2 to 3. I had a shift kit on it, and now reverse engages slowly, but I can live with it. The transmission has survived my hard driving (this is a strong 440), but I am usually careful to back off when shifting.

On a side note, what did you do to that engine? What rpm is your peak power and torque, and how streetable is it?

Thanks.

 

i am NOT a trans expert. but with a modded valve body the band adjustment is more important. the few shift kits i have done had the bands set different than stock. i think mostly the band adjustment is closer than stock. here is something i came across. an EXTERNAL filter.
man o man i about forgot yes its a cut & past sorry. __________________
after you clean the trans. add this to your*chrysler*trans. an external fluid filter
1. go to auto-zone. get 2210, its called a power steering filter, but it is for transs to. it is for 3/8 tubing. by (magna-fine) be sure to use high pressure hose. Reff:http://www.magnafilter.com
2. for other sizes wix 58964 5/16 tube size

 

I would bet you do not have the throttle kick down adjusted properly

 

Engine is 30 over with j heads with some port and polish work. Has 10.5 compression , holley street dominator intake, holley 750, comp cam xe274, hooked competition headers. It's nice and is driven on the street . Has power brakes and all ,and will light up tires quick even with the 2.94 gear I have in it . Here's a video

 

Had it right just wasn't doing what u need it to do. Got the trans back in with the rebuild and is doing wonderful nice firm fast shifts. Thanks for the input

 

Thanks for the input trans back in and is doing great

 

Thanks for the help trans is back in and doing great love the valve body mods . Nice quick firm shifts

 

Cool ....
Time to head out to SGMP....