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3 Speed To 4 Speed #1359941 12/27/12 10:43 PM 12/27/12 10:43 PM
Joined: Jul 2007 Posts: 653 Fort Worth, TX Dago Red OP mopar
Dago Red OP mopar Joined: Jul 2007 Posts: 653 Fort Worth, TX	I only have one stick car and it's already a 4 speed. A local garage owner is helping his cousin upgrade a 71 Duster. Nice car. A s/b stroker and an 8 3/4 but it has a three speed (floor mounted) How difficult to change over to a tried and true Ma Mopar 4 speed and what parts will they need? (A clutch and new flywheel will be necessary too) These guys a mechanically sharp, they just haven't done any early Mopar stuff. They even tossed out a Chevy guy who bad-mouthed the build. Ya gotta like that! Pretty please, don't launch into a sales pitch about aftermarket 5 speeds or overdrive automatics. I'm asking here because this is where the sharp razors hang out. Thanks in advance. If You Can't Be Good, At Least Be Colorful

Re: 3 Speed To 4 Speed [Re: Dago Red] #1359942 12/27/12 11:03 PM 12/27/12 11:03 PM
Joined: Jan 2003 Posts: 4,285 Ohio 6 64dodge572 master
64dodge572 master 6 Joined: Jan 2003 Posts: 4,285 Ohio	If it is a V8 3-speed, all you would need is the 4-speed, shifter & linkage, as the bellhousing will be dual bolt pattern to accept either transmission. We can supply whatever you need. Wayne Brewers Performance Inc. 4-speed transmission and parts specialists PH 937-947-4416 or 937-698-4259 FAX 937-947-4419 www.brewersperformance.com

Re: 3 Speed To 4 Speed [Re: 64dodge572] #1359943 12/28/12 12:15 AM 12/28/12 12:15 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Hi Wayne, Is there a better 3 speed shifter setup available (shifter mech, rods, linkage, etc.) that is a direct replacment for a stock 70-74 A-body unit? Maybe one that the stock shifter handle will work with? The factory mechanisms are sort of junkie.

Re: 3 Speed To 4 Speed [Re: ScottSmith_Harms] #1359944 12/28/12 07:58 AM 12/28/12 07:58 AM
Joined: Jan 2003 Posts: 21,072 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,072 Niles , Ohio	Scott I think Hurst made one.I have a 3 speed that someone stuck in the 65 B sedan I had.It has a Hurst shifter.Seems to be a tight shifter.Been sitting on the garage floor for probally 10 years.Seem no one wants 3 speed trannys.Rocky Chrysler Firepower

Re: 3 Speed To 4 Speed [Re: 64dodge572] #1359945 12/28/12 12:42 PM 12/28/12 12:42 PM
Joined: Jul 2007 Posts: 653 Fort Worth, TX Dago Red OP mopar
Dago Red OP mopar Joined: Jul 2007 Posts: 653 Fort Worth, TX	Wayne is the 4 speed an improvement, strength wise, or is the 3 speed stout enough? It seems unusual to me to have a 340 A-body with an 8 3/4 with a 3 speed between the pair. If You Can't Be Good, At Least Be Colorful

Re: 3 Speed To 4 Speed [Re: Dago Red] #1359946 12/28/12 12:57 PM 12/28/12 12:57 PM
Joined: Apr 2008 Posts: 232 Nebraska D Dodge-N-Shelby enthusiast
Dodge-N-Shelby enthusiast D Joined: Apr 2008 Posts: 232 Nebraska	A few years ago, I picked up a 72 Demon, 340, 3 speed with 3.23s. I swapped in a set of 3.55s and it was a real fun car on the street. 340 was stock, never messed with too. Of course, I didn't have the eqivalent set up with a 4 speed to compare it to either, but it was still a manual!

Re: 3 Speed To 4 Speed [Re: Dodge-N-Shelby] #1359947 12/28/12 01:01 PM 12/28/12 01:01 PM
Joined: Jan 2003 Posts: 43,541 Round Lake Beach, Illinoisy Rhinodart Rhinotruck
Rhinodart Rhinotruck Joined: Jan 2003 Posts: 43,541 Round Lake Beach, Illinoisy	A friend in high school had a brother who owned a 71 Demon with a 340, 3-speed, and 3.91 gears, it was the quickest street package in town! Stoplight to stoplight he couldn't be beat! I thing the combination of the 3-speed gear spacing and the 3.91's was ideal. The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it. JB Rhinehart, Realist A-Body's RULE!

Re: 3 Speed To 4 Speed [Re: Rhinodart] #1359948 12/28/12 01:25 PM 12/28/12 01:25 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	Quote: I thing the combination of the 3-speed gear spacing and the 3.91's was ideal. I'll let you know

Re: 3 Speed To 4 Speed [Re: Rhinodart] #1359949 12/28/12 01:27 PM 12/28/12 01:27 PM
Joined: Jan 2003 Posts: 4,285 Ohio 6 64dodge572 master
64dodge572 master 6 Joined: Jan 2003 Posts: 4,285 Ohio	Scott--no, there is no Hurst replacement shifter for the 3-speed available, I am sure there was years ago, but since Hurst was purchased by B & M there is no info available on a part number to go by to possibly find a NOS package somewhere. The 4-speed would be an improvement over the 3-speed, better splits and stronger, although the A230 3-speeds were pretty tough as well. Wayne Brewers Performance Inc. 4-speed transmission and parts specialists PH 937-947-4416 or 937-698-4259 FAX 937-947-4419 www.brewersperformance.com

Re: 3 Speed To 4 Speed [Re: 64dodge572] #1359950 12/28/12 01:31 PM 12/28/12 01:31 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	Yea that's what I thought Wayne but figured if one existed you'd know about it. Keep me in mind if you stumble accross anything I can use. I am going to run a Passon 5 speed eventually but I need to get my car put together so while I'm waiting I'm gonna run the 3 speed because that was what originally came in it. *Have you noticed any differences between the shifter mech/shifter/linkage setups for a /6 3 speed trans and a v8 3 speed trans? Speaking 1970-71 A-body.

Re: 3 Speed To 4 Speed [Re: ScottSmith_Harms] #1359951 12/28/12 01:37 PM 12/28/12 01:37 PM
Joined: Jan 2003 Posts: 4,285 Ohio 6 64dodge572 master
64dodge572 master 6 Joined: Jan 2003 Posts: 4,285 Ohio	Quote: Yea that's what I thought Wayne but figured if one existed you'd know about it. Keep me in mind if you stumble accross anything I can use. I am going to run a Passon 5 speed eventually but I need to get my car put together so while I'm waiting I'm gonna run the 3 speed because that was what originally came in it. *Have you noticed any differences between the shifter mech/shifter/linkage setups for a /6 3 speed trans and a v8 3 speed trans? Speaking 1970-71 A-body. Scott--No, its the same crap. Wayne Brewers Performance Inc. 4-speed transmission and parts specialists PH 937-947-4416 or 937-698-4259 FAX 937-947-4419 www.brewersperformance.com

Re: 3 Speed To 4 Speed [Re: 64dodge572] #1359952 12/28/12 01:50 PM 12/28/12 01:50 PM
Joined: Feb 2007 Posts: 1,608 fresno ca M mikeysmopars top fuel
mikeysmopars top fuel M Joined: Feb 2007 Posts: 1,608 fresno ca	If you do change to the 4 speed The drive line is going to need to be shortened. Founder and CEO of the Central Valley Mopar Drag Pack

Re: 3 Speed To 4 Speed [Re: Rhinodart] #1359953 12/28/12 11:25 PM 12/28/12 11:25 PM
Joined: Jun 2011 Posts: 511 AZ. 6 696pack mopar
696pack mopar 6 Joined: Jun 2011 Posts: 511 AZ.	Quote: A friend in high school had a brother who owned a 71 Demon with a 340, 3-speed, and 3.91 gears, it was the quickest street package in town! Stoplight to stoplight he couldn't be beat! I thing the combination of the 3-speed gear spacing and the 3.91's was ideal. The three speed has a good gear spread for racing. We sold a new 70 340 Challenger (A66) with that 3 speed and it hauled the mail through the 1/4.

Re: 3 Speed To 4 Speed [Re: mikeysmopars] #1359954 12/28/12 11:28 PM 12/28/12 11:28 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	Quote: If you do change to the 4 speed The drive line is going to need to be shortened. It shouldn't need shortening with an A body A833. Maybe a different yoke though, depending on the A833 in question. 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 Speed To 4 Speed [Re: 64dodge572] #1359955 12/29/12 11:04 AM 12/29/12 11:04 AM
Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL Commando1 master
Commando1 master Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL	Quote: Scott--no, there is no Hurst replacement shifter for the 3-speed available... Why won't the Hurst Universal 3 speed shifter work?

Re: 3 Speed To 4 Speed [Re: Dago Red] #1359956 12/29/12 12:18 PM 12/29/12 12:18 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: It seems unusual to me to have a 340 A-body with an 8 3/4 with a 3 speed between the pair. It was actually pretty common, as the 3-speed didn't get an insurance surcharge like the 4-speed did. Quote: If you do change to the 4 speed The drive line is going to need to be shortened. No, I've done this conversion a couple of times; the (all-synchro) three-speed manual trans is the same length as the 4-speed manual, so the driveshaft length is the same. As I recall, you do have to change the front yoke, though, as the 3-speed has a 904 sized/splined output shaft, while almost all 4-speeds have the 727 sized/splined output shaft.

Re: 3 Speed To 4 Speed [Re: Supercuda] #1359957 12/29/12 08:41 PM 12/29/12 08:41 PM
Joined: Mar 2010 Posts: 632 MD-USA D Dodgeguy101 mopar
Dodgeguy101 mopar D Joined: Mar 2010 Posts: 632 MD-USA	Quote: Quote: If you do change to the 4 speed The drive line is going to need to be shortened. It shouldn't need shortening with an A body A833. Maybe a different yoke though, depending on the A833 in question. [/quote I agree, did the 3 speed to 4 speed swap in a 71 Demon with a 318, all that was needed was a different yoke.

Re: 3 Speed To 4 Speed [Re: Dodgeguy101] #1359958 01/02/13 09:50 AM 01/02/13 09:50 AM
Joined: Jan 2005 Posts: 4,862 the frozen wastes... Pale_Roader Swears too much
Pale_Roader Swears too much Joined: Jan 2005 Posts: 4,862 the frozen wastes...	While we're discussing 3 and 4-speeds... Would a 70 E-body 3-speed in a 6-cyl car be the same as the 3-speed in a 340 car? Did they make different 230's in the same year like they did with 833's? You could get a 383-2bbl with a 230 3-speed, could you not? Between those and 340's thats gotta be a pretty solid transmission.

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