[steelhead01]

the NV5600 is rated MAX at 650 lbs ft of torque, what's your truck make max?

800 lbs ft will walk right through 6th gear and set it up for failure

do you tow heavy?

what tranny lube and how much?

any PTO cover coolers on the tranny?

stock NV5600s run too hot towing heavy

 

[steelhead01]

6th gear is at the top of the box, gets very little lube oil since it is lubed by oil fling only, the NV5600 does not run a pump like many of the big rig trannys.
gear cooling is by the lube flow only
gear gets hot beyond metallurgy specs. looses strength and surface hardening. tooth fails. gear fails.

put at least 6 qts in the next tranny with 2 coolers on it to get lots of cool lube oil to 6th gear.
i run 7 qts of Redline, 5 of MTL and 2 of MT90 mix

a Dodge shop will require their special lube for a rebuild warranty.

 

[steelhead01]

you have 2 choices after a repair warranty expires. word of mouth is worthless in court,
unless you have something in writing?

1. pay the bill or
2. give them the truck
most states have a vehicle repair shop lien law. the shop can send a repo tow truck and haul your rig off.

if they put in the tranny lube in the Dodge/Chrysler jugs, it's $25 a qt. $100 right there.

yes, they made some money on the parts but is it worth losing a day's pay in small claims court and still maybe getting $100 back?

most shops only give 30 or 90 parts/labor repair warranty

few hotshotters tow heavy in 6th in an NV5600

Ok guys, need some advice here. The shop who built the tranny in the first place (12 month/12,000 mile warranty) told me to bring it in and they would take care of it for me, not a problem. The 12 month warranty ended January 9th, it busted on the 11th. I pick it up today and I was informed (after paying almost $2700 to have it re-built the first time) that since I am a good customer I would only have to pay the $650 for the 6th main and counter, a couple bearings and the seals to put it all back together, plus the fluid. Anyone else think this is shady at best? The $650 was just parts, they picked up the labor since I was a "valued customer" even though they never called to tell me what was wrong or give me an estimate, they just fixed it cause they would "take care of it" and threw me a bill that seems ridiculously over priced for a main and counter gear set! Just a note, on the first rebuild invoice, the 6th gear main was $142.40, counter was $172.83, seems impossible for a couple bearings, seals, and manual tranny fluid to cost almost $350!

 

[steelhead01]

side,
still doesn't explain why the OEM factory tranny broke big big time

tajinate,
any markings on the sides of the gears/bearings they returned to you. if you can prove they used substandard foreign not OEM parts, then you have a case and can take them to court on the first and second repair.
I've never seen Chinese knockoff gears for a NV either the 4500 or 5600. bearings yes.

i gave you the reality of the vehicle service laws and industry not a shirt sleeve to cry on.
if you don't pay the bill and they have a valid legal claim, they'll probably just turn it over to a collection agency which will go after your pay check and bank accounts.

i've seen lots of Dodges and GMC products with failed nv5600 6th gears, know of 2 now setting for replacement gears/shafts.

all of the gears and shafts now used for repair are coming out of junkyard trucks and damaged trannys.

still the strongest 6th speed on the market behind 325hp 600lb ft.

the first set, dry ones, look like metallurgy heating failure from the photos but would take testing to be certain.

i dunno what has been said thus far, but if you got your tranny rebuilt and it broke i would bet money they used korea parts. genuine nv shafts and gears are a MUST when workin with the 45 or the 56's. . .you shouldnt be breakin your 5600 unless A) your bearings are bad and the shafts buckle, B) you do something incredibly stupid, C) you put copious amounts of power to it (well over 1000 lb ft), or D) THERE ARE KOREA PARTS INSIDE.

especially if you are dealing with a tranny man you dont know, he probably used korea parts. a lot of tranny builders get nv45's and 56's for routine bearing rebuilds and they rape the guts. i.e. they take your nv shafts and gears for other projects and replaced htem with cheap, accessible korea parts. your authentic nv parts are like gold in this world of endangered nv56's.

ive seen korea parts break a few days after install on multiple occasions. a genuine nv56 is arguably the stoutest transmission ever put into a light duty truck, i had 200,000 miles on my last one with extensive abuse and double its power rating the entirety of its life. i broke my main shaft due to bearing failure. i have some authentic parts out of that tranny if you are interested, and no im not sayin all the above because im tryin to sell you parts, i couldnt care less if you buy them or not (tryin to help ya out with info not play salesman)

 

[steelhead01]

side,
tajinate's original tranny lasted 6 years and 100k+ miles so don't see how that's a low mile factory defect if that is what you are referring to.
never have seen a low mileage failure in a 5600 behind a stock engine.

taj,
have the failed gears, shafts and bearings examined by a local Dodge dealer certified 5600 mechanic for failure analysis and any foreign made parts substitution, you're going to need proof in court. the horse's mouth is the best. unbiased experts always win. you'll just have to pay his court time but low cost in comparison to what you've put out already.

if it's a local shop, the owner probably knows the judge better than you and probably donates to the judge's campaign and poker parties.:rof

good luck

i listed many reasons trannys fail. . .if you are referring to a low mileage tranny- - -the reasons a low mile factory tranny fails are abundant. . .but its either because its a failure in parts/assembly, or someone did something stupid with their trannys. it could be as simple as a missing/incorrect shim, or a faulty bearing, micro crack in shaft, etc etc.

.