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3 & 4 Speed Manual Transmission #63068 05/25/08 08:59 AM 05/25/08 08:59 AM
Joined: Dec 2005 Posts: 11 Germany SPS OP member
SPS OP member Joined: Dec 2005 Posts: 11 Germany	Hello, i have a couple questions about the 3 & 4 Speed Manual Transmissions. A Smallblock A-Body with a 3 Speed Manual has the same body hump, bellhousing and tailshaft like the 4-Speed cars, right ? Or are the parts different to the 4 Speed cars ? If i would swap the 3-speed to a 4-speed, i can use the tailshaft from the 3-speed, right ? Is for a smallblock A-Body, a manual 4-speed trans with iron housing or a trans with aluminium housing better ? The aluminium housing would be better i think because the reduced weight from the trans. Or is a iron housing better, because its stronger like the aluminium housing. Thanks for answering my questions. Greets from Germany Last edited by SPS; 05/25/08 08:59 AM.

Re: 3 & 4 Speed Manual Transmission [Re: SPS] #63069 05/25/08 01:49 PM 05/25/08 01:49 PM
Joined: Dec 2004 Posts: 10,552 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,552 Rittman Ohio	All you need to do is go to www.bigblockdart.com they have all the information you may need. The hump and and crossmember are the same,the shifter,clutch linkage,bell,and tailshaft are different as far as I know. Gus 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: 3 & 4 Speed Manual Transmission [Re: SPS] #63070 05/30/08 04:03 PM 05/30/08 04:03 PM
Joined: Dec 2005 Posts: 11 Germany SPS OP member
SPS OP member Joined: Dec 2005 Posts: 11 Germany

Re: 3 & 4 Speed Manual Transmission [Re: SPS] #63071 05/30/08 04:26 PM 05/30/08 04:26 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	You can change over from a 3-4spd no problem you will need a new Yoke as 3 spd is different from the 4 spd If the 3 spd is col mounted the floor will not have the hump. Use the aluminum bell housing as scatter shield can be a real pain if you do not know what you are doing. However forget that if you plan on regularly racing go with a safety shield

Re: 3 & 4 Speed Manual Transmission [Re: Paul_Fancsali] #63072 05/30/08 09:27 PM 05/30/08 09:27 PM
Joined: Oct 2005 Posts: 9,065 Milwaukee, WI In_The_Pink master
In_The_Pink master Joined: Oct 2005 Posts: 9,065 Milwaukee, WI	Quote: You can change over from a 3-4spd no problem you will need a new Yoke as 3 spd is different from the 4 spd So and A-body 3-speed's (A-230?) output shaft is the larger size (same as a 727's)?

Re: 3 & 4 Speed Manual Transmission [Re: In_The_Pink] #63073 05/30/08 09:34 PM 05/30/08 09:34 PM
Joined: Jan 2003 Posts: 2,734 Charlotte, NC 4 446acuda master
446acuda master 4 Joined: Jan 2003 Posts: 2,734 Charlotte, NC	Quote: Quote: You can change over from a 3-4spd no problem you will need a new Yoke as 3 spd is different from the 4 spd So and A-body 3-speed's (A-230?) output shaft is the larger size (same as a 727's)? A/F short A230 has small spline like 904 and long tailshaft B/E/Truck has 30-spline output like 727. And about an A230 tailhousing bolting to an A833, it not even close to to the same bolt pattern. Also the A230 uses 3/8" bolts where the A833 uses 7/16" bolts for the tailhousing to main case bolts.

Re: 3 & 4 Speed Manual Transmission [Re: SPS] #63074 05/31/08 10:45 AM 05/31/08 10:45 AM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	I just pulled a 3 speed. Mine was column shift. Slip yoke no worky with the 833OD. If you need a 4 speed hump get an original for ease of installation. Nobody will tell you that the repop ones are for 75 and 76 Abodies. Extra metal work will be required! My clutch linkage works just fine. Mine is a slant! "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: 3 & 4 Speed Manual Transmission [Re: Rug_Trucker] #63075 05/31/08 10:46 AM 05/31/08 10:46 AM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	BTW the 3 speed was the same length as the 4 speed. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: 3 & 4 Speed Manual Transmission [Re: Rug_Trucker] #63076 05/31/08 03:48 PM 05/31/08 03:48 PM
Joined: Dec 2005 Posts: 11 Germany SPS OP member
SPS OP member Joined: Dec 2005 Posts: 11 Germany	Hi, thanks for the answers. The car has a 3-Speed on the floor. So the change to 4-Speed is easier.

Re: 3 & 4 Speed Manual Transmission [Re: SPS] #63077 05/31/08 04:41 PM 05/31/08 04:41 PM
Joined: Oct 2005 Posts: 9,065 Milwaukee, WI In_The_Pink master
In_The_Pink master Joined: Oct 2005 Posts: 9,065 Milwaukee, WI	I'd also like to know if the 3-spped and 4-speed floor humps are the same, so I'm givng you a Rug- was the 4-speed you tried the 3-speed slip yoke on/in an A/F-body or a B/E/Truck A-833?

Re: 3 & 4 Speed Manual Transmission [Re: In_The_Pink] #63078 05/31/08 06:00 PM 05/31/08 06:00 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Depends. Early A bodies had a unique bellhousing for the htree speed and the four speed, they will not swap. Later A's had a common three and four speed bellhousing, will swap. If it's the later A then the clutch linkage swaps too. I believe the humps are the same, if both are floor shifters obviously. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: 3 & 4 Speed Manual Transmission [Re: Supercuda] #63079 06/05/08 01:42 PM 06/05/08 01:42 PM
Joined: Dec 2005 Posts: 11 Germany SPS OP member
SPS OP member Joined: Dec 2005 Posts: 11 Germany	Hi Supercuda, from what year starts the "later A" that you mean ?

Re: 3 & 4 Speed Manual Transmission [Re: SPS] #63080 06/07/08 09:21 PM 06/07/08 09:21 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	67 and up are generaly the late A's, but hte commonality of bellhousing patterns started later than that, I am not exactly sure when, I want to say 1970, but basically if it's aluminum it has both patterns. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: 3 & 4 Speed Manual Transmission [Re: Supercuda] #63081 06/09/08 08:16 PM 06/09/08 08:16 PM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	Quote: 67 and up are generaly the late A's, but hte commonality of bellhousing patterns started later than that, I am not exactly sure when, I want to say 1970, but basically if it's aluminum it has both patterns. If you are talking SB or BB maybe so. Not on my 72 slant 3 speed housing. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: 3 & 4 Speed Manual Transmission [Re: Rug_Trucker] #63082 06/09/08 09:16 PM 06/09/08 09:16 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	67-76 3&4 speed A-body humps are the same within any respective year

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