NV4500 Diesel Vs. Gasser?

[botboy]

Ok, so I'm debating whether I put a 465/205 behind my 6.5 in my crewcab, or spend the big bucks and put an NV4500 behind it.

Doing a car-part search, looks like the NV4500 came behind a gasser and a diesel - what's the difference? Just a lower OD ratio, or what?

Truck is an '80 C30 CCSB, originally a 350/TH400/2WD truck, when i'm done plan to have a 6.5 (Mech. PMD from '93 Cube van), banks kit, manual, 4x4 with a D60 up front....I got a lotta work ahead of me

 

[neverendingproject]

No difference. Only difference was that 93-94 models, all of them, had a lower ratio. The only gearing differences in diesel vs gas is in the rear end.

 

[tRustyK5]

The diesel version has a harmonic damper inside. My NV4500 is a '95 diesel version.

The big round thing on the back is the damper.

Rene

 

[DEMON44]

that must be a GM thing because my '98 Dodge nv4500 definately doesn't have anything like that.

 

[tRustyK5]

It is a GM thing...and goes a long way to keeping 5th gear from coming loose.

Rene

 

[DEMON44]

that must be why the full splined mainshaft is the recommended Dodge fix.

 

[tRustyK5]

Maybe, I do know the cause is 5th gear rocking against the nut. Heavy load and the transition between throttle and no throttle puts a ton of rotational stress on the gear...and being that it's not full spline it eventually can develop a bit of a play. That rocking motion against the nut loosens it off eventually.

The damper on the GM version sits between the nut and the gear.

I did carefully check the mainshaft on mine for any signs of fretting and saw none...so I put it together using a stock replacement nut.

Rene

 

[DEMON44]

I stuck the updated pinch nut on mine, and welded it to the shaft. we'll see how long mine holds I've got fuel and air components coming to go over 600horse.

 

[tRustyK5]

Cool (on the 600 hp part)

My 6.2 will never be able to hurt the NV4500...

Rene

 

[mosesburb]

The diesel version has a harmonic damper inside. My NV4500 is a '95 diesel version.

The big round thing on the back is the damper.

Rene

I believe the damper was a GM-only thing not specific to diesel. I have two NV4500's, one gas 6.34 and a diesel 5.61 and both have the damper.