5th gear thread (fifth gear fix) NV4500 transmission
#1
5th gear thread (fifth gear fix) NV4500 transmission
How many of you have fixed your 5th gear nut without welding it to the output shaft?
I'm thinking that installing the updated nut (which has two set screws) is a good idea.
With a good amount of the new permanent Loctite 263 on the output shaft and on the set screws. Anybody else think that should take care of it?
Has anybody seen the 5th gear fix by this company??
NV4500 Transmission 5th Gear Repair
They have some kind of special retainer, but I can't find any info on it???
Does anybody have the tool available to loan for a fee?
6743 is the number of the tool I need.
Don't like the idea of welding it... that can compromise the strength of the shaft.
Thanks!
I'm thinking that installing the updated nut (which has two set screws) is a good idea.
With a good amount of the new permanent Loctite 263 on the output shaft and on the set screws. Anybody else think that should take care of it?
Has anybody seen the 5th gear fix by this company??
NV4500 Transmission 5th Gear Repair
They have some kind of special retainer, but I can't find any info on it???
Does anybody have the tool available to loan for a fee?
6743 is the number of the tool I need.
Don't like the idea of welding it... that can compromise the strength of the shaft.
Thanks!
Last edited by Gunmetal; 01-15-2011 at 07:46 AM.
#2
my buddy bought the new gear and washer with the latest and greatest retention nut with set screws, he installed it all and with locktite too
6 months later when that one backed off too I told him to bring the truck to me
here is what I did to fix it and the truck is still on the road today
https://www.dieselbombers.com/dodge-...ining-nut.html
6 months later when that one backed off too I told him to bring the truck to me
here is what I did to fix it and the truck is still on the road today
https://www.dieselbombers.com/dodge-...ining-nut.html
#3
i myself have used two different fixes both updated nuts one was a new nut that was cut and had a set screw to clamp the two pieces together for a tight fit needless to say i didnt get much over 10k before i lost it again. My truck currently has the nut that your looking at in it with 30k on it and no problems.
#4
#7
my buddy bought the new gear and washer with the latest and greatest retention nut with set screws, he installed it all and with locktite too
https://www.dieselbombers.com/dodge-...ining-nut.html
https://www.dieselbombers.com/dodge-...ining-nut.html
The nut is a solid design, with set screws, and brass pucks. The earlier design looks to be a two piece with set screws.
One similar to this:
NV4500 Transmission 5th Gear Repair
Now THAT looks like a sure fire fix. It is held in place by the splines of the shaft, which makes it IMPOSSIBLE for the nut to back off.
100% solution but it is not super cheap.
I will probably use 263 loctite, one piece nut with set screws also 263 loctited, torqued to 300ft/lbs, then install the one piece nut retainer from that website.
#8
the biggest problem I see when peeps do the set screws is they dont cowboy them up, for those that dont know this means there is a backer setscrew behind the first one that actually doing the setting, the second set screw holds the first one from backing out from vibs......the new nut has 2 holes for set screws 120* apart
#9
Manufacturers of engines and drivetrains always do things that make owners and mechanics scratch their heads...
---AutoMerged DoublePost---
the biggest problem I see when peeps do the set screws is they dont cowboy them up, for those that dont know this means there is a backer setscrew behind the first one that actually doing the setting, the second set screw holds the first one from backing out from vibs......the new nut has 2 holes for set screws 120* apart
Last edited by Gunmetal; 01-16-2011 at 07:41 AM. Reason: Automerged Doublepost
#10
A few thousand miles back my 4500 got a rebuild... Seems the guy that owned the truck before me fixed the 4500 by welding the nut in three places. I came off the light towing a Geo Metro of all things and therer was a big bang. A real big bang. No forward, no reverse, no 4wd...dead right there. Got it on the hoist and took it apart. The output shaft had sheared off clean at the welds. Darn near perfect clean cut. You could see the penetration well into the shaft. Ran it over to the T-shop and the brought her back to life with all new guts, top plate, and updated shaft and nut. I would have to say, keep the welder out of there.