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| 3 spd to a 4 https://slantsix.org/forum/viewtopic.php?t=32776 |
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| Author: | flatiron [ Sat Dec 13, 2008 2:21 pm ] |
| Post subject: | 3 spd to a 4 |
I have a 74 duster /6 3spd on the floor I would like to go to a 4 spd. How hard is it and what do I need to do? |
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| Author: | DusterIdiot [ Sat Dec 13, 2008 3:25 pm ] |
| Post subject: | Easy... |
You will just need the tranny, bellhousing, shifter and linkage... and you are good to go with a Floor shift '74.... so that does open the easy possibilities for getting a 1975-1980 A-833OD and putting it under there and then getting a 'fun ratio' to drive with... Now hopefully it's not a 3spd automatic floor shift... that will take a fair bit of work to make the conversion... |
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| Author: | Joshie225 [ Sat Dec 13, 2008 3:25 pm ] |
| Post subject: | |
You have the easiest car to convert since you already have a floor shift car. You need the 4-speed, it's shifter with linkage, the driveshaft yoke if the spline count is different and a bellhousing if you have the 3-speed only bellhousing now. I did this swap in my own '74 Duster around 1990 when this stuff was still cheap and needed everything I listed. |
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| Author: | flatiron [ Sat Dec 13, 2008 6:06 pm ] |
| Post subject: | |
[quote="Joshie225"]You have the easiest car to convert since you already have a floor shift car. You need the 4-speed, it's shifter with linkage, the driveshaft yoke if the spline count is different and a bellhousing if you have the 3-speed only bellhousing now. How will I know if I have a 3 spd only bellhousing? |
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| Author: | DusterIdiot [ Sat Dec 13, 2008 7:17 pm ] |
| Post subject: | It'll be small |
Quote: How will I know if I have a 3 spd only bellhousing?
Ceej posted some pics from my garage a while back lining out some bellhousing differences. The 3 spd only bell has one bolt pattern and the 3 spd will be using it, the 4 speed bell will have a second set of threaded bolt holes that are wider, 1974 is a purpose built year...slant six with 3 spd typically got the 3 speed bell as a cost saving measure...I don't think the straight 4 speed was available as an option behind the six, yet... -D.idiot P.S. if you do have a floor shift A-230, that is a 'good' 3 speed tranny which someone might want to upgrade their A-745/903 crunch box with....FYI |
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| Author: | flatiron [ Sun Dec 14, 2008 5:27 am ] |
| Post subject: | |
So if I crawl under my Duster and look at the bell housing even with the 3 spd bolted up I will still see the bolt pattern for a 4spd right? |
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| Author: | Mopars4life [ Tue Mar 17, 2009 1:48 pm ] |
| Post subject: | 3 to 4 spd |
hey guys its been awhile, Just picked up a 4 spd that connected to a 318 motor. I have a 3 spd on the floor. What do i need to do to switch it or can I? I have the linkages the z bar,no yoke,and no shifter? Help? I have the bellhousing too. |
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| Author: | DusterIdiot [ Tue Mar 17, 2009 7:29 pm ] |
| Post subject: | You now need... |
Quote: Just picked up a 4 spd that connected to a 318 motor. I have a 3 spd on the floor. What do i need to do to switch it or can I? I have the linkages the z bar,no yoke,and no shifter? Help? I have the bellhousing too.
You almost have enough to switch, since you have the 3 spd on the floor.You will need a 225 4 spd bellhousing (check the bearing retainer size for OD or non OD bellhousing fitment). You won't need the 318 bell, 318 z-bar, you will need a 4 spd shifter/shift rods/shift 'handle', and a matching driveline yoke (you can check the splines on the back of the tranny- 25 or 26 splines, you can use a 3 spd or an A904 auto tranny yoke, 29/30 splines and it's a standard A-833 or A-727 auto yoke). -D.Idiot |
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| Author: | Rug_Trucker [ Thu Mar 26, 2009 5:30 am ] |
| Post subject: | Re: You now need... |
Quote: a matching driveline yoke (you can check the splines on the back of the tranny- 25 or 26 splines, you can use a 3 spd or an A904 auto tranny yoke, 29/30 splines and it's a standard A-833 or A-727 auto yoke).D.Idiot
My crunch box 3 speed yoke did not fit the 833OD out put. Luckily I had a driveshaft from my 74 Doooster!
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