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plymouth6
3 Deuce Webber
Joined: 02 Aug 2009
Posts: 98
Location: Spokane Washington
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Post subject:
Best Tranny for drag racing?
(Wed Oct 06, 2010 3:39 pm)
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| What year auto tranny would be the best for drag racing? I have a 64 904 that I can use but was told by someone that the later ones are better. Thank you for any help.
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Raymond Flynn
Registered Six Offender!!!!
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Doc
Guru
Joined: 14 Oct 2002
Posts: 4978
Location: Working in Silicon Valley, USA
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Post subject:
(Wed Oct 06, 2010 3:52 pm)
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If possible, use a 68 and later 904 with the larger input shaft. More torque converts are available for that size input shaft.
But... these will not fit-up to 60 to 67 SL6 crankshafts with the small counter-bore in the back of the crank. (torque converter register hole)
The 68 and up 904 also has mechanical shift linkage, (not cable activated)a different (more common) speedo gear arrangement and a slide-in driveshaft yoke.
DD
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plymouth6
3 Deuce Webber
Joined: 02 Aug 2009
Posts: 98
Location: Spokane Washington
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Post subject:
(Wed Oct 06, 2010 4:20 pm)
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| Thank you DOC for the info. What is the H.P limit on the 904 trans if I rebuild it and put all of the small block internals it it?
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Raymond Flynn
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Fopar
6 Pack Dart
Joined: 02 Nov 2002
Posts: 1866
Location: Eugene, Oregon
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Post subject:
(Wed Oct 06, 2010 4:49 pm)
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Racers run the 904 behind small blocks that run in the 10's. True they do use a few after-market parts, you should have no problems with the stock parts behind a slant six.
Richard_________________  
Part of Tyrde-Browne Racing |
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plymouth6
3 Deuce Webber
Joined: 02 Aug 2009
Posts: 98
Location: Spokane Washington
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Post subject:
(Wed Oct 06, 2010 5:05 pm)
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This will be a turbo motor putting out a est 500 H.P 
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Raymond Flynn
Registered Six Offender!!!!
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Fopar
6 Pack Dart
Joined: 02 Nov 2002
Posts: 1866
Location: Eugene, Oregon
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Post subject:
(Wed Oct 06, 2010 6:09 pm)
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Simply do the same mods as the small blocks do and should be fine.
Richard_________________
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plymouth6
3 Deuce Webber
Joined: 02 Aug 2009
Posts: 98
Location: Spokane Washington
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Post subject:
(Wed Oct 06, 2010 6:11 pm)
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Thank you very much Fopar 
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Raymond Flynn
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Shaker223
Turbo EFI
Joined: 20 Sep 2006
Posts: 1135
Location: The Hand
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Post subject:
(Fri Oct 08, 2010 7:06 am)
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| I put a low gear set and A999 front half into my 904. |
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chazc
2 BBL ''SuperSix''
Joined: 20 May 2011
Posts: 12
Location: Newfoundland
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Post subject:
(Fri May 27, 2011 2:27 am)
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| low gear sets help, we put the guts out of a v8 904 into the slant six 904 case and added extra clutches and a shift kit. Never broke yet and pulls hard off the line
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1967 Dodge Dart
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