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| Transmission swap??? https://slantsix.org/forum/viewtopic.php?t=44419 |
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| Author: | Billypoe1 [ Sat Apr 09, 2011 11:27 am ] |
| Post subject: | Transmission swap??? |
OK i have a 1978 Dodge D100 long bed. 2wd with the slant 6 three speed. it has been converted to a floor shift by the previous owners and doesn't work 100% correct. so i bought a 1980's model slant 6 engine with the 4 speed transmission out of what i believe was a dodge ram but i'm not sure.. all i need to know, is "can the 4 speed transmission bolt up to the D100's engine?" |
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| Author: | sandy in BC [ Sat Apr 09, 2011 11:53 am ] |
| Post subject: | |
Yes! |
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| Author: | Billypoe1 [ Sat Apr 09, 2011 12:00 pm ] |
| Post subject: | |
sweet! i just had a few questions when looking at the two engines. the 4 speed had some new electronics on the engine, so i didn't wanna mess with a full swap-out. my d100 engine is only just rolling over 74,000 original miles, and idk about the other engine. i know a swap would be a waist. so i have a few questions. 1.) which engine is better, the 78' d100 engine. or the early 80's model ram engine. both slant 6's. but which one is actually a better engine? give me details. 2.) which transmission is a better choice in all honesty i figured the original 3 speed was better but i have no clue. please give me some guidance |
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| Author: | mcnoople [ Sun Apr 10, 2011 6:33 am ] |
| Post subject: | |
No question the 4 speed is better. Gears 1,2,3 all have about the same ratio for both transmissions. The 4 speed has an overdrive 4th gear. So through gears 1-3 it will shift and accelerate about the same with about the same amount of ratio/rpm drop between shifts, but you have 1 more gear and much improved fuel economy. As to which engine is better. It all depends on condition, how they have been treated and maintained. |
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| Author: | DusterIdiot [ Sun Apr 10, 2011 9:55 am ] |
| Post subject: | Not everytime... |
Quote: No question the 4 speed is better. Gears 1,2,3 all have about the same ratio for both transmissions. The 4 speed has an overdrive 4th gear. So through gears 1-3 it will shift and accelerate about the same with about the same amount of ratio/rpm drop between shifts, but you have 1 more gear and much improved fuel economy.
That only equates to the 1975+ A-833 OD...if he plugs in an NP435 4 speed 4th is direct and the lower gears are very "granny" and it will not bolt directly to the A-230/A-833OD bellhousing...he also has the option that pre-75 trucks could come with the direct ratio 4th gear in certain versions (or he could plug in a B-body A-833...), but would need the pre-74 small IBR.-D.Idiot |
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| Author: | Billypoe1 [ Sun Apr 10, 2011 10:30 am ] |
| Post subject: | |
so in all honesty,,, i can just drop my transmission and put the 4 speed up in it? i was hoping it would be that easy... |
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| Author: | DusterIdiot [ Sun Apr 10, 2011 12:07 pm ] |
| Post subject: | So what 4 speed is it? |
Quote: i can just drop my transmission and put the 4 speed up in it? i was hoping it would be that easy...
Best question is: is the shift lever sticking into the top of the tranny case, or is is mounted to the side of the transmission?If it's #2, you should be good to go...if it's #1...you'll need to rethink this. -D.Idiot |
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| Author: | Billypoe1 [ Sun Apr 10, 2011 12:12 pm ] |
| Post subject: | |
my current tranny is mounted on the side, and a hole is cut into the floor with it sticking up. the new tranny is mounted directly into the top of the casing. so that means it wont work correct?? |
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| Author: | DusterIdiot [ Sun Apr 10, 2011 2:26 pm ] |
| Post subject: | Np435... |
Quote: the new tranny is mounted directly into the top of the casing. so that means it wont work correct??
You would need the bellhousing/clutch/flywheel for that guy to make it work...and it has the same final ratio as your 3 speed...it's more heavy duty but the gearing is for hauling things...you may also need to change the floor shift location...it's an NP435...It is not a direct plug and play...time to go on the hunt for an A-833OD for a truck. -D.Idiot |
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| Author: | Billypoe1 [ Sun Apr 10, 2011 3:32 pm ] |
| Post subject: | |
also id like to know "what is a good, cheap carb. that i could put on my slant six, and would mount correctly with no problem?" |
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