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Welcome to the 3500HD.com forum created October 2009

Author Topic: A driveline to match these HD's  (Read 1625 times)

RPF207

  • 3500HD Driver
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  • Posts: 224
  • Age: 29
  • Location: Maine
A driveline to match these HD's
« on: June 22, 2016, 02:28:52 PM »
Gotta admit, these HD's are stout. But their 90s drivetrain options weren't as "killer" as the chassis they sat on. While I plan on having my 99 135" 4x4 for a long time, I do not plan on keeping the 6.5 nv4500 combo. It does the trick, gets 17 mpg, and would last a long time if maintained. I originally thought maybe I could put a 12v cummins in front of the 5 speed but the nv4500 is the second biggest limiting factor on this truck. I lose 2,000lb gvcw over the auto. Plus hauling in fifth with that little gear isn't promising. After a lot of research I decided I could find a 98 f650 with a 12v cummins and eaton fuller 6 speed which is rated at 25,000lb gvw and just put an Atlas 2 spd divorce mount transfer case in it since there's no real great divorced transfer case options. Finally a combo that I could tow with that the truck was meant for. Bump the 12v up to 500hp and nothing could stop it. I figured this is some good info to share in case there's anyone else in the same situation. so sometime in the near future my plans are just as explained
« Last Edit: June 22, 2016, 02:31:03 PM by RPF207 »
1999 chevy HD 4x4 135.5" 6.5 nv4500 bw4470 Dana 70 HP 10 lug front

Due to recent budget cuts the light at the end of the tunnel has been turned off

Raymo

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  • Age: 30
  • Location: Port Huron Area, MI
Re: A driveline to match these HD's
« Reply #1 on: June 22, 2016, 08:11:55 PM »
Only thing I can say negative, and from first hand experience as I'm installing a divorced case as I type... Is there isn't poopoo for room once you've installed your 2wd trans. Shortest I could get an intermediate shaft made was 16", so your case will be back that much farther. Mine ended up where the frame kicks up, in the way of the tank and with no nice way to build a mount. Also doesn't leave much room for exhaust. My Allison is only 5" shorter than my getrag/205 combo was from back of the engine block to the rear yoke. I'm willing g to bet the 6er and SAE housing will be damn close to those same dimensions.

Food for thought, and I wanna see it happen  ;D
'94 3500-HD, Cummins, Getrag, NP205. Shortend rear frame with a Pickup Bed. Dana 60 front, stock 80 rear.

'03 2500-HD 8.1 and Allison

Raymo

  • Global Moderator
  • 3500HD Driver
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  • Posts: 381
  • Age: 30
  • Location: Port Huron Area, MI
Re: A driveline to match these HD's
« Reply #2 on: June 22, 2016, 08:14:12 PM »
Also consider what Dodge guys are doing to their trucks and transmissions, without the advantage you currently have of axle gearing. I'd take a second look at the ol 4500, especially since you've already rebuilt it.
'94 3500-HD, Cummins, Getrag, NP205. Shortend rear frame with a Pickup Bed. Dana 60 front, stock 80 rear.

'03 2500-HD 8.1 and Allison

RPF207

  • 3500HD Driver
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  • Posts: 224
  • Age: 29
  • Location: Maine
Re: A driveline to match these HD's
« Reply #3 on: June 22, 2016, 08:37:09 PM »
Yeah. Lots of work for sure. The nv4500 is a nice trans, but I can see myself eventually ruining my investment. The 6.5 nv4500 combo will someday be planted into my '89 k3500 reg cab dump where it will do well. But this HD just begs for a strong power plant. I was asked to haul a 23,000 lb boat back and fourth from Maine to Florida twice a year and it doesn't sound fun with my set up now. The 5.13s make for an early shift into overdrive. Not highway friendly. Hauling that much weight, you're best to stay outta the nv4500 5th.. I plan on swapping in 4.10s as the eaton fuller 6 has a double low first with a nice .78 6th
1999 chevy HD 4x4 135.5" 6.5 nv4500 bw4470 Dana 70 HP 10 lug front

Due to recent budget cuts the light at the end of the tunnel has been turned off

GM Guy

  • 3500HD Driver
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  • Posts: 233
  • Age: 27
  • Location: NW. KS to S. ID
  • manual transmission 2wd enthusiast
Re: A driveline to match these HD's
« Reply #4 on: July 03, 2016, 04:14:50 PM »
A-Team turbo the 6.5L, get a pair of finned aluminum PTO covers and possibly a fluid pump running up to an OEM auto trans cooler, and give it heck. :)

I weighed around 22,000 lbs when I pulled the west side of the rockies on I70 with a bone stock 6.5L diesel and NV4500, and it handled it like a champ. 4.10s and 31 inch tires.

Our 92 HD 6.5L 5spd 2wd was bone stock when we took a load weighing about 24K combo out to Idaho, and it never dropped below 3rd.

So if mine can do this stock, imagine what one could do hopped up a little.

Tanman_2006

  • Single Axle Driver
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  • Posts: 7
Re: A driveline to match these HD's
« Reply #5 on: December 26, 2016, 02:13:05 PM »
I'll agree to the NV4500 being a poor choice for a towing trans when you have low gears and can't pull in 4th.

I do think the 6.5 can do the job with some turbo help and tuning, gears wouldn't hurt either.

I'm not a fan of calling a 5.9 a medium duty engine and I've seen a lot of turned up 12 valves that don't last long.
2013 Chevy 3500HD LML Crew Cab Cab and chassis 113k mile FOR SALE
1994 K3500 Single Cab Long Bed 6.5 NV4500 350k Miles
1994 C3500 Single Cab Cab and Chassis 5.7 NV4500 113k Miles
1993 K3500 Single Cab Cab and Chassis 6.5 NV4500 240k Miles

 


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