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904 low gearsets #1594359 03/17/14 03:29 PM 03/17/14 03:29 PM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim OP I Live Here
nomore65BelvJim OP I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	I've got several mid-late 70's 904's. I'd like to know if there is a way to find out if any of them have the low gearsets without having to tear them down. Does the pan rail # stamping give that kind of information? Any other way to tell short of disassembly? Thanks! Here's one: 8077831-100_3639a.jpg (67 downloads)

Re: 904 low gearsets [Re: nomore65BelvJim] #1594360 03/17/14 03:38 PM 03/17/14 03:38 PM
Joined: Jan 2003 Posts: 25,786 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,786 Rio Linda, CA	The low gearset didn't arrive until '80, the one pictured is a '71. The INTERNET, the MISinformation superhighway

Re: 904 low gearsets [Re: John_Kunkel] #1594361 03/17/14 03:52 PM 03/17/14 03:52 PM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim OP I Live Here
nomore65BelvJim OP I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	Thanks for the info John. Odd on the date though, I pulled that trans out of a 79 Volare. 8077859-100_1817a.jpg (46 downloads)

Re: 904 low gearsets [Re: John_Kunkel] #1594362 03/17/14 05:01 PM 03/17/14 05:01 PM
Joined: Jan 2006 Posts: 8,162 USA 3 360view Moparts resident spammer
360view Moparts resident spammer 3 Joined: Jan 2006 Posts: 8,162 USA	Is there any way that the low gear planetary out of a 904 could be used to replace the planetary gears in a 46RH overdrive unit? As i understand it, to create the 0.69 ratio overdrive unit in the 518/46RH/46RE Chrysler engineers re-used the 1.45 ratio planetary gears out of a 727 1 divided by 1.45 equals 0.69 a low planetary set of 1.54 would create a 1/1.54 equals 0.65 overdrive ratio

Re: 904 low gearsets [Re: nomore65BelvJim] #1594363 03/17/14 06:47 PM 03/17/14 06:47 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	Quote: Thanks for the info John. Odd on the date though, I pulled that trans out of a 79 Volare. Just means the Volare owner decided to replace his failed lockup 904 with an earlier non-lockup version... And it could have the low gearset installed if he wanted performance... Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

Re: 904 low gearsets [Re: nomore65BelvJim] #1594364 03/17/14 06:54 PM 03/17/14 06:54 PM
Joined: Jan 2003 Posts: 25,786 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,786 Rio Linda, CA	Quote: Thanks for the info John. Odd on the date though, I pulled that trans out of a 79 Volare. My bad, I read the wrong number...build date is Feb 6, 1979 The INTERNET, the MISinformation superhighway

Re: 904 low gearsets [Re: 360view] #1594365 03/17/14 06:55 PM 03/17/14 06:55 PM
Joined: Jan 2003 Posts: 25,786 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,786 Rio Linda, CA	Quote: Is there any way that the low gear planetary out of a 904 could be used to replace the planetary gears in a 46RH overdrive unit? No, way different in size. The INTERNET, the MISinformation superhighway

Re: 904 low gearsets [Re: John_Kunkel] #1594366 03/18/14 12:21 AM 03/18/14 12:21 AM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim OP I Live Here
nomore65BelvJim OP I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	Quote: Quote: Thanks for the info John. Odd on the date though, I pulled that trans out of a 79 Volare. My bad, I read the wrong number...build date is Feb 6, 1979 So, if it was an 80 or newer, would there be any way to tell by the numbers? I do drag home an 80's car occasionaly

Re: 904 low gearsets [Re: nomore65BelvJim] #1594367 03/18/14 03:31 PM 03/18/14 03:31 PM
Joined: Jan 2003 Posts: 25,786 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,786 Rio Linda, CA	From what I understand, '80 and '81 were "maybe" but by '82 all transmissions in the 904 family had the low gearset. The INTERNET, the MISinformation superhighway

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