[hidesertwheelin]

I'm looking at swapping in a NVG-3500 into my '82 Jimmy 4x4 w/ a 6.2L diesel. Has anyone done this swap? I know someone on here swapped a 5 spd form a s-10 into a 4x2 truck, anyone do the 4x4? Was there any problems with the external slave cylinder interfiring with the front driveshaft? What years have the internal slave cylinder? What years can I bolt a 208/241 on to?

 

[red suburban]

you need to talk to high sierra 2500, he's the guy that put one in his 2wd.

 

[High Sierra 2500]

I'm here... I just don't know too much about the 4WD setup. A 2WD installation is no big deal (basically just bolt it in), but I don't know how the 4WD setup would work...

 

[hidesertwheelin]

My only real concert is the front driveshaft coming into contact with the slave cylinder. What parts besides the tranny did you take from the doner truck? Also did you have to get a clutch pedel set up from a hydo equiped truck (85-and newer I think?)?

 

[High Sierra 2500]

I took the tranny, slave and master cylinders, clutch (I know, kind of stupid, but it had less than 500 miles on it and works fine), and clutch pedal. The clutch pedal looks kind of funny, but it works (there are pics of it in my garage)... I should get the pedal out of a fullsize truck and install it.

I used everything out of the donor truck. I had to make my own pedal mount, but you could probably get the pedals and everything out of a fullsize truck and go with that...

There are a lot of different variations of that tranny... I've got one with the slave cylinder on the passenger side, but I've heard that most of them are on the driver's side... Whether it would clear the front driveshaft or not I don't know...

 

[jodydewey]

NV3500 swap

I believe the transmission you are looking for is an NV4500. That is the one used for a 4x4. The 3500 is for a 2wd.

 

[hidesertwheelin]

I believe the transmission you are looking for is an NV4500. That is the one used for a 4x4. The 3500 is for a 2wd.

Nope, the 3500 was in 1/2 ton 4x4's, the 4500was in 3/4 and 1 ton trucks.

 

[High Sierra 2500]

The NV4500 is a heavy duty tranny. The NV3500 is not as big. Both transmissions were put in 2WD and 4WD trucks. The 4500 is bulletproof, but the 3500 works fine if you aren't rough on it...

EDIT: By the way, I am making a new custom shifter for the 3500. The stock one from the S-10 was too short and had the wrong bend so it hit the seat going into 2nd, 4th and reverse. I didn't care that much so I've been driving it like that, but today I had the day off so I cut a notch in it, bent it, and welded it back together. The next step will be to put a bend in it to move the shifter closer to the driver and lengthen the lever a bit.

 

[jodydewey]

Nv3500

So you are saying that you are using an NV3500 behind a 6.2L and it is working fine? I am working on putting a 6.2L in my 1968 Chevy truck and I have an NV3500 in it right now behind a Chevy 350.

 

[High Sierra 2500]

Yeah, it works great... I like the way the gears are spaced, too. If you were going to four wheel you might want a stronger tranny, but this one seems to work fine for on-road use...

 

[jodydewey]

6.2L in an S10

You said that your Jimmy had a 6.2L in it. Are you talking the small Jimmy's or the larger one that looks like a K5? I would think that a 6.2L is too wide to fit in an S10/Jimmy chassis. A small block chevy is a shoehorn in there and the 6.2L is bigger than that.

Jody

 

[hidesertwheelin]

You said that your Jimmy had a 6.2L in it. Are you talking the small Jimmy's or the larger one that looks like a K5? I would think that a 6.2L is too wide to fit in an S10/Jimmy chassis. A small block chevy is a shoehorn in there and the 6.2L is bigger than that.

Jody

I have a fullsize Jimmy. I am currently running 33" tires and 3:08's gears. I am thinking of just swapping in a 465 manual, cause I don't really need the overdrive. I was going to swap in 4:11 gears if I go to a 5 spd or keep my 700r4.

 

[High Sierra 2500]

I've been considering building a V8 diesel powered S10 or S10 Blazer. If I do it I'll be using the Olds 350 diesel I am (slowly) building up, although I think that you could get a 6.2 to fit. It is bigger than a 350, but it is made to mount in the same space so I think it would work.

have a fullsize Jimmy. I am currently running 33" tires and 3:08's gears. I am thinking of just swapping in a 465 manual, cause I don't really need the overdrive. I was going to swap in 4:11 gears if I go to a 5 spd or keep my 700r4.

So is your 700R4 still working good?

Unless you need a strong tranny for offroad use I think I would go with something that has an overdrive (700R4, NV3500, NV4500, NP833)... Just gives you more options. You can always cruise in 4th if overdrive is too steep, and that way if you ever want to put lower gears on the truck you have the overdrive for highway use.

 

[hidesertwheelin]

So is your 700R4 still working good?

Unless you need a strong tranny for offroad use I think I would go with something that has an overdrive (700R4, NV3500, NV4500, NP833)... Just gives you more options. You can always cruise in 4th if overdrive is too steep, and that way if you ever want to put lower gears on the truck you have the overdrive for highway use.

It works, but when it shifts from 2nd to 3rd, I makes a banging noise and I can fell it in the back of the truck. Mind you my rear u-jount angle isn't perfect, but it isn't horrible. I've been driving with the gear selector on "drive" instead of overdrive, and that seems to help a lot. A lot less banging from the tranny, and my milage is a lot better. I belive i was lugging the hell out of the motor w/ 33" tires and 3.08 gears in overdrive. So when this tranny goes kaput, I think i'm either going with a turbo 300/400 or a 465, which ever I can find cheaper. My original plan to swap in a 5 spd also inclued swapping to axles with 4.11's (it's cheaper to find 10-bolt's with 4.11's then to buy gears and swap them).

 

[Guipo]

I would think with those bigger tires, and a bigger truck, and with 4x4, the 3500 might not be stout enough. Its really meant for smaller pickups. HS gets away with it, cause he's 2wd and is only on road. I would think 4x4 would tear up that tranny.

Go with the 465. Its a really tough tranny, and its made to put up with more than the NV3500.

 

[hidesertwheelin]

I know the 465 is stout, but this is my daily driver. I drive 120 miles a day round trip in her, that's why I was considering the nv3500, and I don't need the strengh or cost of a nv4500. But I am getting a lot better milage driving around in 3rd gear, so when this tranny goes, I will be swapping in a non-overdrive tranny.

 

[Guipo]

Well, remember, these engines get best economy spinning 1800-2200 RPMs. Here's a neat calculator that has several different ways you can set it up, or enter your own ratios.

http://www.grimmjeeper.com/gears.html

Figure out what will work for you and go with it.

In regards to the NV3500, I would say my philosophy is if your gonna do it, overbuild it, so you dont have to do it again.

Guipo

 

[High Sierra 2500]

would think with those bigger tires, and a bigger truck, and with 4x4, the 3500 might not be stout enough. Its really meant for smaller pickups. HS gets away with it, cause he's 2wd and is only on road. I would think 4x4 would tear up that tranny.

:exactly:

If it's just a daily driver that stays on the road it's great and cheap to install, but for off-roading you probably need a tougher tranny. Sounds like this is a daily driver, but it doesn't sound like it needs an overdrive so the 465 would be fine anyway... I was thinking the overdrive might be a good idea, but it doesn't sound like it needs it.

 

[jdemaris]

So you are saying that you are using an NV3500 behind a 6.2L and it is working fine? I am working on putting a 6.2L in my 1968 Chevy truck and I have an NV3500 in it right now behind a Chevy 350.

There are two versions in strength, a NV3500 and a NV3500HD. The regular NV3500 is rated for engines with up to a max. of 300 lb. ft. of torque. The NV3500HD is rated for an engine with up to 340 lb.ft. of torque and a max. GVW of 7200 lbs.

The standard NV3500 was used mostly for four cylinder, six cylinder,and small displacement gas engines up to 5.2 liters. Since both the 6.2 diesel and the 305 gas engine both put out a maxium torque 250 lb. ft., there's no problem. 1990 C-code 6.2 diesel is rated at a max. of 240 lb. ft. of torque. 1990 J-code 6.2 diesel is rated at 248 lb. ft. of torque. 1990 305 gas engine is rated at 255 lb. ft. of torque. The 5.7 was rated 300 lb. ft. of torque and put the standard NV3500 to the max. of it's rating.

I suspect if you put a turbo on a 6.2, used it hard, you'd burn up a NV3500 pretty fast. Same goes with the earlier NP833s overdrive 4 speed that GM put on early 6.2 diesels and 305 gassers.

The NV4500 comes in two versions also. The standard NV4500 is rated for a GVW of 14,500 lbs.