Need Advice…

Antonm said:

Oh, so you're going for the band-aid. I've head that once the fifth gear gets pushed off once, the splines on the main shaft get a little worn/ loose during that process and those retainer nuts don't hold for long. Supposedly the retainer nuts work a lot better if you install one before fifth gear falls off (and the splines get worn/ loose) , but not so great after. Of course that's all rumor and hearsay obtained from the internet, so who whos if its actually true or not.
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Antonm said:

I too have done extensive research, and own two of them. A fully splined main shaft is the permanent fix. One of my NV4500 12 valves has the band-aid retainer nut (that I installed) and the other has a fully splined main shaft. I'll continue to run the retainer nut on the one that has it until that transmission either fails or needs to come out for another reason.
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David Ivory said:

Excellent! What has your experience been with the fully splined main shaft? How many miles have you put on it? What loads did you put it through? What brand shaft is it? What type of retainer did you use on the fully splined shaft to hold the gear on?
I have seen 320K miles on the stock setup. I may go with your setup instead! Thanks!

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Antonm said:

The one with a fully splined shaft I had re-built by Standard Transmission and gear out of Ft Worth TX (link to their website below). If your interested in going that route , take a look at their website or give them call. I have never heard of professional built transmission with a fully splined main shaft having the fifth gear fall off again. They have other issues (bearings, heat and lubrication) if you overwork them, but the fifth gear stays in place with fully splined main shaft.

Standard Transmission & Gear | Tremec - Borg Warner - New Venture - Getrag, Cummins, 4 speed transmission, 5 speed transmission, 6 speed transmission

We stock a complete line of manual transmissions, differentials and transfer case parts & rebuilt units. Dallas / Ft. Worth in-house R&R on all differentials, Transfer Cases and Manual Transmissions. We also remove and replace clutches and flywheels. Great Service & Prices on Standard...

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Antonm said:

Mileage isn't the cause of failure, its load and torque applied. An nv4500 that has a stock engine in front of it, and that also isn't used to tow heavy in fifth gear, will last a lifetime in stock form. Put a brand new zero-mile stock nv4500 behind a high torque engine, then tow heavy in fifth gear, and it'll fail with a quickness.

If you don't use your truck in such a manner that it needs the upgrade (or have plans to use your truck in such a manner), then the upgrade is a waste of money.
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GAmes said:

I lost my 5th gear, driving 70 with the cruise control on, no load when the truck had less than 100k on it. I had not started towing commercially at that time and the heaviest trailer I owned was about 10,000 pounds. I had not done a thing to the engine because it was still under warranty. Fast forward to the 11 following transmissions. None of them had a fifth gear come off, all had a fully splined shaft.




Your research is faulty and nothing you posted is true other than the design problem with the stock shaft. I doubt anyone can say for certain what the cause of the nut backing off is.



A hackneyed response.



Yet you post nonsense.

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GAmes said:

I lost my 5th gear, driving 70 with the cruise control on, no load when the truck had less than 100k on it. I had not started towing commercially at that time and the heaviest trailer I owned was about 10,000 pounds. I had not done a thing to the engine because it was still under warranty. Fast forward to the 11 following transmissions. None of them had a fifth gear come off, all had a fully splined shaft.




Your research is faulty and nothing you posted is true other than the design problem with the stock shaft. I doubt anyone can say for certain what the cause of the nut backing off is.



A hackneyed response.



Yet you post nonsense.

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David Ivory said:

Don't forget, YOUR the idiot that emplied that "torque multiplacation" was why a 4 speed automatic could take the place of an automatic with many more gears then you went out and bought a new truck with 8 speeds. That makes you the CLOWN of the year so go back to your corner with a dunce hat on and shut up!

"nonsence" ??? YOU are the COMPLETE IDIOT that posted "torque multiplication" from a automatic transmission with only 4 gears would work as well as a transmission with many more gears for towing heavy weight and then went out and bought a new truck with 8 gears! Only a CLOWN would make a statement like that so go back to your corner and put you dunce cap on! You won the IDIOT OF THE YEAR award with that one!!! LOL!

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Antonm said:

I’m with GAmes on this one. He may be a grumpy old man, but he generally knows his stuff.
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GAmes said:

The only thing that 8 gears does better than the 3 gears in my other automatic pickup is it keeps the engine at it's most efficient rpm while accelerating and while driving. The top two gears are overdrive, the 3 speed transmission doesn't have an overdrive gear. The new one is obviously stronger, but only because there is almost 50 years of technology in my new truck. Both pickups pull my 4000 pound boat and trailer with ease. I still have the old pickup. I bought the new pickup for my wife to drive because of it's creature comforts. Regardless, that has nothing to do with an NV4500 fully splined shaft. Your red herring is moot and you don't have a clue.

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GAmes said:

Open your mouth, change feet. My old pickup has a carbureted 350 that makes about 250HP. My new Hemi is advertised at 395 HP yet both trucks pull my boat up the ramp the same. If you ever find someone who would marry you tell her she is an idiot if she wants a new vehicle. Her pickup is no more perfect for towing than mine, it just has a bigger cab, a nicer stereo, a better heater and an A/C that works.
How many class 8 trucks have you driven to be such an expert?

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Demon87 said:

Sorry spilled my popcorn so figured I would throw some info. Fully spliced shaft is the most permanent fix you can get. If your dumb enough to lug ANY truck something is going to break. Thats basic science proven over the last 70 years. Don't believe me or games call the pros. Bought all my parts from standard over 10 years ago and around 300k towing miles. Never had an issue with that trans sense.

As far as gear ratios and strength why are you not talking science? All I read bs an smack talk. People come here for info not bs 😉

So can we act like gentleman an have an actual debate? I'm genuinely curious what knowledge you have for trannys

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GAmes said:

My '67 Chev came from the factory with a 327 and a 2 speed automatic. It has a GVWR of 7500 pounds. My '19 Ram has almost double the HP and four time as many forward gears, yet it's GVWR is only 6900 pounds. How do you explain the lower rating?

Try to respond like an adult without violating the forum rules this time.

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Antonm said:

David you need to shut the hell up. You’re the idiot in this conversation and you don’t seem to realize that.

Going to name calling and putting words in other peoples mouths when you can’t win with logic is pretty dang pathetic.
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GAmes said:

So much for responding like an adult. But weight is weight, pulling or carrying. Your answer doesn't carry water.

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krashDH said:

He's notorious for spewing nonsense.
All you gotta do is look at his post history and it becomes clear. I've been telling him that too for a while now, glad others are seeing thru his BS and calling him out.

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GAmes said:

Just where did I say that two is the same as eight? I explained why eight is better, but it isn't why you think it is. Two work very well behind the lower HP engine because of torque multiplication. That's the fact.

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GAmes said:

There is a difference between and 8 speed automatic transmission and a 2 speed automatic transmission, and I know why 8 is better than 2. I tried to explain it to you, but it's a waste of energy. I don't need to tell myself anything different.

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David Ivory said:

By now no one expects you to understand. Please let all the transmission manufactures know that they don't need al those extra gears they put in because 2 will do the same as 8. Be sure to tell them all they really need is "torque multiplication" because its MAJIC! All those thousands of semis on the hwy were made with way too many unnecessary gears!

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krashDH said:

He's notorious for spewing nonsense.
All you gotta do is look at his post history and it becomes clear. I've been telling him that too for a while now, glad others are seeing thru his BS and calling him out.

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krashDH said:

You're what we call a "regurgitator".
You actually know very little, so you run to YouTube or whatever Google hits on first and try to pass off (mostly incorrect) that information like you actually know about it.
You're incredibly transparent.

You might need to take a break from forums, I can't imagine it's easy to fit all that knowledge you look up and post word for word in that brain without overloading it.

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mustangmarty1967 said:

So turns out I lost 5th gear, but all the other gears seem to be working, so gonna keep on trucking’ at 45 mph.

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David Ivory said:

I believe that info to be correct.

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