3.9 vs. 5.2 Transmissions (manual) [Archive] - Dodge Durango Forum

: 3.9 vs. 5.2 Transmissions (manual)


SASclubcab4x4
09-03-2009, 07:52 PM
Here is a new/stupid question for you guys..

Doing a quick search the 5.2 Dakota uses the NP535 for a 5-speed and the 3.9 Dakota uses an AX15 5-speed

(both 97's)

Will the NP535 bolt up to a 3.9 being as how its supposed to be the 5.2 minus 7 & 8?? I am wanting to do a manual swap to my wheeler so I can have a 4:1 LoRange and not idle through my brakes!! :funny:

Thanks for the help. I think even if I can't get the NP535 from this local dealer ill go ahead and pickup the interior shit like the pedals and what not. Also if I bought the NP535 tranny would my current Tcase from my auto bolt up?

Anthony
09-03-2009, 11:28 PM
the 5.2 used a nv-3500 tranny which also bolts up to a 3.9

Hahns5.2
09-03-2009, 11:53 PM
Correct on the NV3500.

The V6s got NV3500s sometime around 2000 I believe.

Anthony
09-04-2009, 04:37 AM
2000 was the first year the nv-3500 was mated to the V6

SASclubcab4x4
09-04-2009, 03:00 PM
ok now heres a twist.. Will that same nv3500 that was used on a 3.9 v6 be used on a 4.7 v8?

Anthony
09-04-2009, 09:35 PM
the nv-3500 was used with the 3.9, 5.2 and also the 4.7

SASclubcab4x4
09-04-2009, 09:37 PM
Saweet. If thats the case Ill find an nv-3500 here shortly and get that swapped into my truck cause I have the 3.9 right now but ill be running the 4.7 outta my wife's 2000 dak. in a year or two

dakotajr
09-16-2009, 06:37 PM
Not to hijack too much, but which is stronger: the NV-3500 or the NP535? And also, will they semi-interchange between Gen II and Gen III?

SASclubcab4x4
09-16-2009, 06:55 PM
Not to hijack too much, but which is stronger: the NV-3500 or the NP535? And also, will they semi-interchange between Gen II and Gen III?

Hey no biggie. I want to get as much tech between trannies on all of these dak's. I need to figure out what im going to do for a manual trans in my dak before we go and do moab next year so..

Primus
09-16-2009, 08:00 PM
The NV 3500 is stronger than the NP535 since it is a newer design.

SASclubcab4x4
09-17-2009, 04:10 PM
Just because its newer means its stronger? I agree I think the nv3500 is stronger but Im not sure I agree with your reasoning. I have heard the case of the nv3500 is stronger I havent heard much about gearing for offroad/towing use though? Any input from you guys?

dakotajr
09-17-2009, 07:38 PM
If a NV3500 will fit, will a NV4500 fit. They are pretty tuff being they put them behind diesel trucks? Are they the same outside dimensions?

91dak239
09-17-2009, 08:07 PM
NV3500 trans will swap between all years of the trucks, and even from the rams. I have no hard facts but I had an NP535 with my stock '91 TBI motor and it was a crappy transmission imo. The 3500 in visual comparison is a much stouter unit than the NP535, the 3500 is supposed to be rated for about 300-350ft/lbs. And at least with the NV3500 you can get a short throw for too.

Its a sloppy shifter if your trying to race with it though, but seeing as how you have a 4x4 i highly doubt you'd be doing that.

Fast360Dak
09-17-2009, 08:50 PM
I gots a used NV3500 that came out of my 96 just takin up some space in my garage.

Shipping may be pricey though.

SASclubcab4x4
09-17-2009, 11:42 PM
quote me an estimate for shipping to 98272 and what you want for your trans? Some pics would be awesome too!

Fast360Dak
09-18-2009, 12:51 AM
Hmm, Im not even usre how to quote that. Assuming it would have to be truck frieght? I'll see if the shop can ship stuff out like that.

SASclubcab4x4
09-22-2009, 05:09 PM
any word on the tranny??

Fast360Dak
09-22-2009, 05:57 PM
Sorry, I forgot. I'll email the shop right now.

dakotajr
09-23-2009, 01:25 AM
If he doesn't buy it, how much are you looking to get for it? I was thinking of putting a 5 speed behind my mild big block. I will be going to Florida the end of November and could pick it up.

impactspoon
09-29-2009, 05:30 PM
If youre like me, and will be going to the junkyard or local buy n sell paper to source this tranny, it can also be found in the following (though the bellhousing you need will be different if it's not coming off a dodge, but thats just common sense)

1993–1998 Chevrolet & GMC CK with Vortec 4300
1999–2006 Chevrolet Silverado 1500 and 2500LD
1999–2006 GMC Sierra 1500 and 2500LD
1993–2003 GM S (S10 etc) trucks with 4.3 liter Vortec 4300
1994–2001 Dodge Ram 1500 [4]
1994–1995 Dodge Ram 2500 Light Duty
1994-???? Dodge Dakota V8

Or, if you want to build a man beast tranny, the NV4500 tranny is also a possibility. Found in standard and heavy duty Rams from 92.5 - 2002 for V8, 2003 - 2005 for the Hemi, and 1994 - 2005 for the Cummins and V10 applications. The NV4500 transmission to bellhousing bolt pattern is shared with 1995 - 2005 GM light trucks, though the GM units had a specific input shaft ( not sure if this applies to the NV3500 aswell). Just thinking out loud, if anyone wants to go deeper into it, follow this linky

http://nv4500transmissions.com/label-code-summary-for-dodge-and-GM/index.htm

BonesDT
02-03-2010, 01:59 AM
I have an '89 Dakota Sport Convertible 3.9L V6 with a confirmed 535 (NV or NP, whatever).

I too am interested in swapping in a 3500 because I want a Hurst shifter and they don't make it for the 535. It will also help when I swap in a V8 in the future.

It seems pretty clear the bellhousing will bolt up the engine, however, does anyone know about the differences between the frame mounts? Also the shifter placement?

91dak239
02-03-2010, 02:04 AM
well first off the attached picture of the 3500 on the right is the GM unit. If you get your hands on either a dakota or ram 3500 all you need to physically mount it to the truck is a different bushing. The rear cross member has a couple mounting spots drilled on it for different mounts. (or at the least mine did) you simply only need this bushing ANCHOR Part # 2954 (info from roackauto.com) its a straight bolt in, don't expect your stock driveline to work though.


Edit: On my truck for some reason the shifter came up under my dash, i've heard its possible i have a ram transmission (which is possibly why its under my dash lol so be sure to get one with the shifter holds the opposite of my pics and it looks like the casting is setup to be made with a shifter further forward and/or backwards more so.
http://i211.photobucket.com/albums/bb219/KenkuraFrog/Engine%20Swap/P1010034.jpg
http://i211.photobucket.com/albums/bb219/KenkuraFrog/Engine%20Swap/P1010218-2.jpg

BonesDT
02-06-2010, 02:32 PM
Stupid no notification. I always seem to have this problem.

What's up 91Dak239. I was just doing some research and stumbled upon your car domain page and studied it. I really like what you've done with your truck. I then wanted to know more about your trans and came right back here to a response to my own post! Researching these Gen 1's always makes me go in circles.

It's nice to know about the different mounts on the cross-member. I'll confirm that next time I'm under my 89.

That's a very valuable pic of the NV3500 shifter mounting flange. I just searched for pics of NV3500 to see if I can find one with the shifter mounted in the rearward cast, but all the other pics of Dodge NV3500's I found only had the single mount cast, looks like it's in the front.

So what did you do with your shifter under the dash? I've still yet to see a pic of your Hurst shifter in your truck.

When you switched to a Magnum, you needed a sensor in the bellhousing, right? Does it go in that black rubber think on the top right of the bellhousing?

Also, how did you mount your Grant steering wheel?

dakattack98
02-06-2010, 04:26 PM
I've got a question about the 3500 swap. I want to do the swap on my 98 4wd with the ax-15. Will the slave and clutch assembly swap over? Also can I reuse the 231 t-case and drive shaft?

91dak239
02-06-2010, 04:44 PM
Stupid no notification. I always seem to have this problem.

What's up 91Dak239. I was just doing some research and stumbled upon your car domain page and studied it. I really like what you've done with your truck. I then wanted to know more about your trans and came right back here to a response to my own post! Researching these Gen 1's always makes me go in circles.

It's nice to know about the different mounts on the cross-member. I'll confirm that next time I'm under my 89.

That's a very valuable pic of the NV3500 shifter mounting flange. I just searched for pics of NV3500 to see if I can find one with the shifter mounted in the rearward cast, but all the other pics of Dodge NV3500's I found only had the single mount cast, looks like it's in the front.

So what did you do with your shifter under the dash? I've still yet to see a pic of your Hurst shifter in your truck.

When you switched to a Magnum, you needed a sensor in the bellhousing, right? Does it go in that black rubber think on the top right of the bellhousing?

Also, how did you mount your Grant steering wheel?

I mounted the shifter in my truck by making a small L bracket and bending it out of some steel, then mounting the shifter handle backwards (sounds weirder than it is). Only problem becomes getting a boot to cover it all, essentially I've determined i need to just make a low console with an offset boot to cover it all up. I'm at work now so i'll try to snap a pic on my cell phone or something on break.

Yes the Crank position sensor slips into the rubber isolator on the top right of the bellhousing.

Grant wheel is mounted using the mounting kit for Gen II Dakota that grant provides, straight bolt-on mod.

91dak239
02-06-2010, 04:47 PM
I've got a question about the 3500 swap. I want to do the swap on my 98 4wd with the ax-15. Will the slave and clutch assembly swap over? Also can I reuse the 231 t-case and drive shaft?

I can only answer that your slave/master cylinders for your clutch will be the same regardless of the manual trans you have in the truck. Sadly I cant answer you on the transfer case as 2WD Gen II are more my specialty. The clutch you'll need to look up if the clutch splines are the same between between the 2 transmissions, I am pretty sure they are but not 100%.

dakattack98
02-06-2010, 06:40 PM
I hope the splines are the same. I've got a brand new clutch for the ax-15.

BonesDT
02-06-2010, 06:44 PM
Grant wheel is mounted using the mounting kit for Gen II Dakota that grant provides, straight bolt-on mod.

2WD Gen II are more my specialty.

You have a 91, which is a Gen I, right??

Only problem becomes getting a boot to cover it all, essentially I've determined i need to just make a low console with an offset boot to cover it all up.

Are you talking about an inner or outer shift boot? I know from my other truck that trying to find custom inner shift boots is impossible. I haven't crunched the measurements, but the Hurst boot below is what I've had in mind as an outer boot. Looks big enough so you can hide all your fabs underneath and line it up right.

BonesDT
02-06-2010, 06:46 PM
Also, do you have the 391-0155 or the 391-0140 shifter?