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Old 02-10-2017, 09:14 PM   #1
ak_petey
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Default nv4500 inspection and update

Pretty much ready to drop in a nv4500 in my 94 ram. But the transmission should probably be inspected before i instal it.
Is there anyone knowledgable on what to do to inspect it or what to do for recommended updates?
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Old 02-11-2017, 12:32 PM   #2
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Default Re: nv4500 inspection and update

5th gear nut needs to be locked in place, I spent 2100, at Youngs gear to have the one in my 96 12valve rebuilt with upgraded shafts,
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Old 02-11-2017, 09:32 PM   #3
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Default Re: nv4500 inspection and update

Just double nut it or what? The main shaft is onkt 125 from what i saw online
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Old 02-12-2017, 12:47 PM   #4
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Default Re: nv4500 inspection and update

No, they drill in and use like a small roll pin to lock it in place
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Old 02-15-2017, 05:53 PM   #5
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Default Re: nv4500 inspection and update

This is similar to the fix for AX10/15 fifth gear problems.
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Old 02-16-2017, 06:46 PM   #6
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Default Re: nv4500 inspection and update

Quote:
Originally Posted by GoinCommando View Post
No, they drill in and use like a small roll pin to lock it in place
Does the shaft need to be pulled before drilling out?
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Old 02-16-2017, 08:24 PM   #7
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Default Re: nv4500 inspection and update

Welp....
Just watched some internet you tube videos. Now i have more questions!

1. I plan on pulling the rear of the trans tomorrow to see if the main shaft has been updated.
2. See of there is an upgraded 5th gear retaining nut.
3. Does drilling out the shaft to install a roll pin weaken the shaft? What do i use to drill that shaft? Isnt it hardened steel?
4. Would using a double retaining nut set up with red loctite work for only a while or just result in the same problem?
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Last edited by ak_petey; 02-16-2017 at 08:27 PM.
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Old 02-16-2017, 11:49 PM   #8
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Default Re: nv4500 inspection and update

I have heard of a butch fix by tack welding the original nut/retainer to the shaft. That would be up to you. Tungsten carbide drills are commonly available on eBay, a very good quality cobalt drill may work, if you choose TC drills be aware they break like glass with any side load or interrupted cut unless held very steady. Then you really have a problem! If removing the rear of the trans case allows access to the shaft/nut, cover any bearings or seals to prevent contamination.
The roll pin should not weaken the shaft, it doesn't have to be very large, 1/16", 3/32" or 1/8" max. All the pin needs to do is keep the nut from turning. Good luck!
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Last edited by wasillashack; 02-16-2017 at 11:59 PM.
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Old 02-17-2017, 09:26 AM   #9
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Default Re: nv4500 inspection and update

Even if it did weaken the shaft, it's after the section that transmits power.

I wouldn't fuss with it, it's not a "have to do" thing. It's not as common as the internet makes it seem to be. I had a 3500 Dodge with about 500k on the trans, never had any trouble. It was "broken in" to the point throwing the shifter in the general direction of a gear without using the clutch usually was enough for a shift.
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