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Will a 904 tranny fit behind a 360? #840246 10/27/10 03:13 PM 10/27/10 03:13 PM
Joined: Oct 2003 Posts: 233 MN S Skid_Demon OP enthusiast
Skid_Demon OP enthusiast S Joined: Oct 2003 Posts: 233 MN	Greetings, I am installing a 360 from a 1978 Ram Charger into a 47 Dodge pickup. Installed a K-frame from a F-body in the 47. Replaced the stock 4:88 rearend with an 8.75 from a 1964 B-Body. I got a 727 (4x4) and torque convertor with the engine. I found a low mile 904 from a mid 70's Chrysler that was behind a 318. I understand the 318 is internal balance, 360 external. So, will a 904 with the 727 touque convetor fit behind the 360? This is my first attempt at such a project, so some/any advice would be helpful. Thanks.

Re: Will a 904 tranny fit behind a 360? [Re: Skid_Demon] #840247 10/27/10 03:26 PM 10/27/10 03:26 PM
Joined: Dec 2005 Posts: 91 S.E. Wis A a4runer member
a4runer member A Joined: Dec 2005 Posts: 91 S.E. Wis	I have one behind my 360 in my Dart with a 3500rpm convertor works just fine bolt up swap.You can not use the 727 convertor you must use a convertor for a 904. Last edited by a4runer; 10/27/10 03:32 PM.

Re: Will a 904 tranny fit behind a 360? [Re: a4runer] #840248 10/27/10 03:29 PM 10/27/10 03:29 PM
Joined: Feb 2003 Posts: 8,671 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,671	not sure I understood, you want to use the torque converter from the 727 in the 904? and bolt that up to the 360? I don't think that works. pretty sure the torque converters are different between a 727 and a 904, but someone more knowlegable should be along to say.

Re: Will a 904 tranny fit behind a 360? [Re: Andrewh] #840249 10/27/10 03:38 PM 10/27/10 03:38 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	No way can you use a 727 converter in front of a 904 transmission.

Re: Will a 904 tranny fit behind a 360? [Re: Skid_Demon] #840250 10/27/10 03:49 PM 10/27/10 03:49 PM
Joined: Oct 2003 Posts: 233 MN S Skid_Demon OP enthusiast
Skid_Demon OP enthusiast S Joined: Oct 2003 Posts: 233 MN	Thanks for the info. I have the 727 and 727 torque convertor. It sounds like the 904 will fit. Sounds like I need a 904 torque convertor. Does the 904 torque converor need to come from a 360, or will one from a 318 fit? Does the internal/external balance just applies to flywheels if you have a manual tranny? Thanks again. Hope to have it on the road soon.

Re: Will a 904 tranny fit behind a 360? [Re: Skid_Demon] #840251 10/27/10 04:11 PM 10/27/10 04:11 PM
Joined: Oct 2006 Posts: 7,367 Iowa burdar Owen's Dad
burdar Owen's Dad Joined: Oct 2006 Posts: 7,367 Iowa	If you run a neutral balance torque convertor, you will need a weighted flexplate.

Re: Will a 904 tranny fit behind a 360? [Re: burdar] #840252 10/27/10 04:43 PM 10/27/10 04:43 PM
Joined: Sep 2005 Posts: 12,481 Chino Valley RodStRace I Live Here
RodStRace I Live Here Joined: Sep 2005 Posts: 12,481 Chino Valley	360 means you need an external balance in back. 904 means a 904 converter. You can buy a 360/904 converter and get a neutral 904 flexplate. You can buy a 360 (offset weight) flexplate and any 904 converter. I don't think the stock 727 flexplate will work with a 904 converter (smaller bolt pattern).

Re: Will a 904 tranny fit behind a 360? [Re: RodStRace] #840253 10/27/10 07:33 PM 10/27/10 07:33 PM
Joined: Nov 2004 Posts: 16,479 On the run… BloFish I Live Here
BloFish I Live Here Joined: Nov 2004 Posts: 16,479 On the run…	with that It really doesn't matter whether you win or lose… as long as you look good doing it! ‘65 A100 ‘69 ‘Cuda ‘73 Vega GT ‘06 Mega Cab ‘14 Mercedes SLK

Re: Will a 904 tranny fit behind a 360? [Re: RodStRace] #840254 10/27/10 08:58 PM 10/27/10 08:58 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Some 727's use the small flex plate. And most after market performance converters used the small pattern flex plate.

Re: Will a 904 tranny fit behind a 360? [Re: Skid_Demon] #840255 10/30/10 12:53 AM 10/30/10 12:53 AM
Joined: Oct 2003 Posts: 233 MN S Skid_Demon OP enthusiast
Skid_Demon OP enthusiast S Joined: Oct 2003 Posts: 233 MN	Good stuff. One more question. If I weld in the cross member mount on the frame for the 904, would I need to move it if I decided to install a 727?

Re: Will a 904 tranny fit behind a 360? [Re: Skid_Demon] #840256 10/30/10 01:25 AM 10/30/10 01:25 AM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	727 and 904 use the same crossmember and mount Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

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