NV3500 behind a 340?

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1968DartGTS

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Can I put a nv3500 in place of a 833 behind a 340? If so would I use the clutch from the nv3500, 833, or would I have to mismatch parts? I want overdrive just to make the car more drivable. Right now at 70 mph it runs about 4100 rpm. The 340 is pretty mild, stock bottem end, mild cam, j heads, and a edelbrock carb. Any advice would be helpful
 
The one I bought/ parts was a 5.2 magnum/ 3500 4x4, Dakota. It used a fairly conventional looking diaphragm clutch. I did not bet some of the throw-out components in the deal. I'm sure the clutch is same bolt pattern as older B&B. Don't remember if it was 10 1/2 or what I may still have it............
 
There are a few different NV3500 to A-body swap threads that have been started here, I don't think I've actually seen one finished though. The consensus is usually they're just as much work as the more popular swaps (they will require significant tunnel modification), while using a transmission that no one really likes in a car.
 
An overdrive 833 would be easier to install.
The nv3500 is a pretty big transmission that wont fit in the stock tunnel, plus you'll need a 143 tooth flywheel and 11" clutch and hydraulic stuff in place of the stock linkage and a lot of other fitment BS to basically run a truck transmission in a car.
 
Can I put a nv3500 in place of a 833 behind a 340? If so would I use the clutch from the nv3500, 833, or would I have to mismatch parts? I want overdrive just to make the car more drivable. Right now at 70 mph it runs about 4100 rpm. The 340 is pretty mild, stock bottem end, mild cam, j heads, and a edelbrock carb. Any advice would be helpful
Do you have 4.56s in it?...why?
Is this a street/strip car,or a streeter?
Boy, I bet that's a hoot!!
Most of the overdrives I have seen are between .65 and .73, with the exception of the GVOD at .78. So say around .69. and times 4100rpm, brings the Rs down to ~2830. This is the same as 3.23s and no overdrive.
For a streeter;
4.56s will get you 60=6530 in second, and 4760 in third, with 27s; neither of which is the best place to be with a combo like yours.
>Ima guessing a good place to be would be 5600 at the top of second; and that would be 3.91s. and that would be 70=3400.and a 10.40 starter gear.
> Ima guessing another option could be the 3.09 Commando box with the 3.09 low gear and 3.55s, for a starter of 10.97;a cruiser rpm of 70=3100; and 60=5100 in second, not the best, but a reasonable compromise. Certainly better than 6530/4760 of the 4.56s.
And guess what, these 3.55s will get you
94@5800rpm; versus
94@7455 in third/5325in fourth with the 4.56s.....Neither of which is any good, with your combo as stated.
________________________________
I have been running this 3.09/3.55 combo since 2004 or so , more or less most of the time, and it is my favorite combo. I know my 367 could pull 3.23s just fine, so Ima thinking your 340 would like the above too.
I ran 4.30s, in my streeter, for one summer, and the first gear was good for one thing only; parading. I yanked it and sold it so I wouldn't be tempted to re-use it,lol.
In any case; just trying to be helpful.
 
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Can Any Body Bring This Topic Up To Date Please! I have a 71 Demon & running a 5.9 Magnum Crate Engine & A833 4 sp. & curious to know as much as possible about this manual 5 speed swap. Any Help ?
 
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Thanx! For The Reply!
Nick
I tell you what tho
That looks like a great trans
and I would build an engine, and combo, just to work with it, if I had the money.
Check out the ratios;
3.49-2.16-1.40-1.00-.73 and the splits are
.62-.65-.71-.73
The splits are progressively tighter so that the faster you go, the less mphs the engine has to pull in each gear. That is the fast way down the road.
The only down side is, to not blow it up, because of it's torque rating. That probably means you will need to use a smaller engine. And that means.... generally...... a slower car. There are other work-arounds.
But think about a streeter, not a racer.
It's a two gear deal. If you can hit 60 at the top of second, you are done. With this trans, it would take 3.23s to hit 60 at about 5200. So a small cam is just right. Say it peaks at 5000.
You could run That with 3.23s, for a starter of 11.27 which is equivalent to 4.23s with a standard A833 low gear. and a 2.35 cruiser gear for 65~1900

and your 11.27 starter won't need a big engine, or a big cam.
Shifting into second at say 5700, the Rs would drop to 3500rpm/41 mph, so it's not a long pull in second, and you're not pushing a 100mph wind, so the engine ain't working all that hard!

So then, if you built your engine with a 5000rpm power peak, yet with a small enough cam to cruise at 1900rpm, you could have a dynomite little combo; then stick it in a sub-3000 pound chassis, and teach the big boys a thing or two about the right combo in the right chassis.
I mean think about it; millions of early Mustangs were doing just that.
Hyup if I could turn back the hands of time..........
Ok now, I'll tell you a secret; I once put a complete 318 top end and cam,onto a 340 short block. I called it my my big-bore teener........ cuz the only thing that made it a 340 was the bore size. And I stuffed that made-of-leftover-parts engine into my 65 Valiant, sub-3000 pound,station wagon, with nothing more than fenderwell headers. That was about 1975, and that combo lives on in my memory as probably my favorite combo ever. Man what a blast that car was.

So now you have a reason to stuff a 5000rpm cam into a low-compression 340, with just about any old heads, and a small 4bbl that nobody else wanted. Hey Ima thinking an old OFFY Dual-Port, and a junk Quadrajet.
Stuff the whole thing into a lightweight-A with an SG-8.25 and 3.21s, that also nobody wants, and this is stacking up to be a GREAT combo.
Hey waitaminute, I might be able to scare most of that recipe up from my junkpiles, hmmmmmmmmmmmmmmmmmm

Lessee where can I get a cheap mint-bodied early Valiant wagon, which I think are called Darts on your side of the 49th................
 
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I tell you what tho
That looks like a great trans
and I would build an engine, and combo, just to work with it, if I had the money.
Check out the ratios;
3.49-2.16-1.40-1.00-.73 and the splits are
.62-.65-.71-.73
The splits are progressively tighter so that the faster you go, the less mphs the engine has to pull in each gear. That is the fast way down the road.
The only down side is, to not blow it up, because of it's torque rating. That probably means you will need to use a smaller engine. And that means.... generally...... a slower car. There are other work-arounds.
But think about a streeter, not a racer.
It's a two gear deal. If you can hit 60 at the top of second, you are done. With this trans, it would take 3.23s to hit 60 at about 5200. So a small cam is just right. Say it peaks at 5000.
You could run That with 3.23s, for a starter of 11.27 which is equivalent to 4.23s with a standard A833 low gear. and a 2.35 cruiser gear for 65~1900

and your 11.27 starter won't need a big engine, or a big cam.
Shifting into second at say 5700, the Rs would drop to 3500rpm/41 mph, so it's not a long pull in second, and you're not pushing a 100mph wind, so the engine ain't working all that hard!

So then, if you built your engine with a 5000rpm power peak, yet with a small enough cam to cruise at 1900rpm, you could have a dynomite little combo; then stick it in a sub-3000 pound chassis, and teach the big boys a thing or two about the right combo in the right chassis.
I mean think about it; millions of early Mustangs were doing just that.
Hyup if I could turn back the hands of time..........
Ok now, I'll tell you a secret; I once put a complete 318 top end and cam,onto a 340 short block. I called it my my big-bore teener........ cuz the only thing that made it a 340 was the bore size. And I stuffed that made-of-leftover-parts engine into my 65 Valiant, sub-3000 pound,station wagon, with nothing more than fenderwell headers. That was about 1975, and that combo lives on in my memory as probably my favorite combo ever. Man what a blast that car was.

So now you have a reason to stuff a 5000rpm cam into a low-compression 340, with just about any old heads, and a small 4bbl that nobody else wanted. Hey Ima thinking an old OFFY Dual-Port, and a junk Quadrajet.
Stuff the whole thing into a lightweight-A with an SG-8.25 and 3.21s, that also nobody wants, and this is stacking up to be a GREAT combo.
Hey waitaminute, I might be able to scare most of that recipe up from my junkpiles, hmmmmmmmmmmmmmmmmmm

Lessee where can I get a cheap mint-bodied early Valiant wagon, which I think are called Darts on your side of the 49th................
 
ny How, like I mentioned, My 71 Demon is Now running a 380 5.9 Crate Motor Magnum. I,m sure it,s pushing around 425 at least now! Torque is probably around 430lbs. below 6ooo r.p.m. I,m running 3:55 posi 8 3/4 It,s a driver . Mostly High Way!
 
Nice combo; very similar to my current build.

Because I live 20 minutes from the nearest redlight, I used to travel a lotta lotta miles at 100kph=62mph~2900rpm. I finally broke down and installed a GVOD. Now I see 65~2230rpm.

One combo I built for that application, was 65mph~1590. That engine would have pulled a lot smaller gear. With 2.76s it woulddabin 65~1234,lol. But with double-overdrive, I was moving in the other direction; soon I had 4.30s back there, and 65 was ~1920. Man that little engine was hot.
Double overdrive was; the A833 od box and the GVOD behind it. I used the GV to split gears;
The ratios were 3.09-2.41-1.67-1.30-1.00-.78-.54 GV in red
Hyup 7 useable gear ratios. Man that little engine was hot.
But the cam dropped lobes so, I upsized.
 
Can I put a nv3500 in place of a 833 behind a 340? If so would I use the clutch from the nv3500, 833, or would I have to mismatch parts? I want overdrive just to make the car more drivable. Right now at 70 mph it runs about 4100 rpm. The 340 is pretty mild, stock bottem end, mild cam, j heads, and a edelbrock carb. Any advice would be helpful
Can I put a nv3500 in place of a 833 behind a 340? If so would I use the clutch from the nv3500, 833, or would I have to mismatch parts? I want overdrive just to make the car more drivable. Right now at 70 mph it runs about 4100 rpm. The 340 is pretty mild, stock bottem end, mild cam, j heads, and a edelbrock carb. Any advice would be helpful
Hi 1968DartGt check out my 1970 Dart 360 with a NV3500. Go to YouTube this is my son YouTube page firehawkband93 1970 Dodge Dart Swinger 340
It will work but a lot of work.

Richard B.

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