727 build question - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer 727 build question

Print Thread

727 build question #2247113 02/04/17 12:06 PM 02/04/17 12:06 PM
Joined: Mar 2003 Posts: 296 AZ. C Casey OP enthusiast
Casey OP enthusiast C Joined: Mar 2003 Posts: 296 AZ.	I have a 727 core from a 1972 440 powered C body that I'm going to have built up for use in my Coronet. The Coronet will be a driver with a mildly built 440, streetable torque converter and a 3:55 rear. It will be mostly street driven with an occasional pass at the strip. The trans currently has a 3.2 kick down lever in it and I was wondering if a 3.8 or 4.2 lever upgrade would be a good idea. Thxs

Re: 727 build question [Re: Casey] #2247229 02/04/17 03:59 PM 02/04/17 03:59 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	IMHO yes. I used a 3.8 on mine. also rebuilt it with new frictions/steels/front/rear bands/seals new CRT-TF-2 shift kit valve body, CRT-billet front/rear servos

Re: 727 build question [Re: Casey] #2247392 02/04/17 09:53 PM 02/04/17 09:53 PM
Joined: Mar 2006 Posts: 9,836 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,836 MI, usa	3.2 will work fine for your application. Make sure you use 4 clutches in the high drum. Doug

Re: 727 build question [Re: dvw] #2247449 02/04/17 11:18 PM 02/04/17 11:18 PM
Joined: Mar 2003 Posts: 296 AZ. C Casey OP enthusiast
Casey OP enthusiast C Joined: Mar 2003 Posts: 296 AZ.	Thanks for the feedback. One other thought. If the present 440 was swapped out for a similarly built, pump gas friendly 496 down the road. Would the 3.2 still be a decent choice?

Re: 727 build question [Re: Casey] #2247669 02/05/17 12:43 PM 02/05/17 12:43 PM
Joined: Mar 2006 Posts: 9,836 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,836 MI, usa	Depends on usage. On the street it will provide a calmer 1-2 shift. Many guys that run FAST class use 2.9. My 9.0@149 car only runs a 3.8 with excellent clutch and band life. Doug

Re: 727 build question [Re: Casey] #2248432 02/06/17 01:31 PM 02/06/17 01:31 PM
Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada Magnum master
Magnum master Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada	Another problem with the 1972 C body core will be the 4500rpm full throttle upshifts. Rick at A & A Transmission has the cure for this. 69 Super Bee, 93 Mustang LX, 04 Allure Super

Re: 727 build question [Re: Casey] #2248507 02/06/17 03:08 PM 02/06/17 03:08 PM
Joined: Mar 2003 Posts: 296 AZ. C Casey OP enthusiast
Casey OP enthusiast C Joined: Mar 2003 Posts: 296 AZ.	Magnum Thxs. I'm a transmission newbie. Just guessing here, being a C body trans it shifts early at WOT compared to an HP unit. Checked out A&As site. He shows multiple governor kits for different RPM shift points. My cam is all done at 5200, so I would use the correlating RPM trans governor?

Re: 727 build question [Re: Magnum] #2248579 02/06/17 04:34 PM 02/06/17 04:34 PM
Joined: Jan 2003 Posts: 25,802 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,802 Rio Linda, CA	Originally Posted By Magnum Another problem with the 1972 C body core will be the 4500rpm full throttle upshifts. Only if you leave it in Drive....manual shifting is a wiser and cheaper option. The INTERNET, the MISinformation superhighway

Re: 727 build question [Re: John_Kunkel] #2248648 02/06/17 06:45 PM 02/06/17 06:45 PM
Joined: Mar 2003 Posts: 296 AZ. C Casey OP enthusiast
Casey OP enthusiast C Joined: Mar 2003 Posts: 296 AZ.	John that makes sense. Any opinion on the 3.2, 3.8 or 4.2 lever choice? Thxs

Re: 727 build question [Re: Casey] #2248690 02/06/17 08:31 PM 02/06/17 08:31 PM
Joined: Jan 2003 Posts: 25,802 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,802 Rio Linda, CA	I'd go with the 3.8 or 4.2 The INTERNET, the MISinformation superhighway

Re: 727 build question [Re: Casey] #2248778 02/06/17 10:37 PM 02/06/17 10:37 PM
Joined: Feb 2005 Posts: 4,314 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,314 Prospect, PA	Originally Posted By Casey Magnum Thxs. I'm a transmission newbie. Just guessing here, being a C body trans it shifts early at WOT compared to an HP unit. Checked out A&As site. He shows multiple governor kits for different RPM shift points. My cam is all done at 5200, so I would use the correlating RPM trans governor? What do you mean by "all done"? What is the cam size?

Re: 727 build question [Re: Casey] #2248872 02/07/17 12:57 AM 02/07/17 12:57 AM
Joined: Mar 2003 Posts: 296 AZ. C Casey OP enthusiast
Casey OP enthusiast C Joined: Mar 2003 Posts: 296 AZ.	Just a 268H Comp Cams hydraulic, 1200-5200 RPM range.

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1