Nv56oo Parts, Any Aftermarket Stuff Yet?

[Hasman06]

Been through a few NV5600 6-spds, and was wondering if anybody is offering aftermarket rebuild kits, syncros and other parts for these things yet. Pretty expensive to go through when we are forced to buy parts from the dealer. Thanks.

 

[rbattelle]

Have you already tried Blumenthals and Standard Transmission?

Ryan

 

[steved]

I noticed the synchronizers that Quad4x4 has went from around $200/set last year to over $800/set now!!!



I figure either they will have replacement parts or I'll be sourcing a G56 when I start to have issues...



steved

 

[DerekW]

I would like to know what you are doing to the NV5600. are you doing high mileage and wearing out bearings and such or is it abuse? there not much to fail on a manual transmission compared to automatic and I have seen on ebay the guys in auto transport are going through a 48re in around 70,000 to 90,000 miles. the manuals are supposed to go for 150,000 or more. so whats going on? I seriously doubt you have gone over 100,000 on a NV5600 from the impression I am getting. You might want to try ordering new parts and this time send them out to be cryogenically treated to make them last longer. contact south bend clutch they can help you with the cryo treatment or and of the Manual transmission problems.

 

[steved]

I seriously doubt you have gone over 100,000 on a NV5600 from the impression I am getting.

I for one have 110k on my NV5600 (and on my 2004. 5 ram), so I don't know why you'd say that???



I'll probably be pushing 160k by this time next year.



steved

 

[jwilliams3]

The NV5600 is a tough as nails transmission on the integrity side of things.

As far as synchros, bearings and such it suffers like any other manual transmission will from fluid starvation, heat, and dirty lube.

 

[steved]

The NV5600 is a tough as nails transmission on the integrity side of things.

As far as synchros, bearings and such it suffers like any other manual transmission will from fluid starvation, heat, and dirty lube.

Agreed, the heat is a biggy. Before the FastCoolers, I ran upwards of 235*F empty, couldn't imagine what it would be towing. Most guys aren't running temp guages on a manual. I know I would not have guess anywhere near that hot. My 47RE in my 99 didn't even run the hot while towing 10k!!!



And one thing about overfilling. I overfilled mine by a quart BEFORE I got the FastCoolers. My trans ran HOTTER than running the fluid at the normal "fill". As soon as I dropped the level back to "normal", the temps dropped.



And anything has a life expectancy... I figure my biggest problem will be synchros and bearings since I'm almost completely stock.



One thing I did check, I had an oil analysis of Amsoil MTL out of my trans... the stuff seems to protect the trans very well based on the wear numbers... but it also wasn't subjected to the temps I experienced before the FastCoolers were installed... just some FYI. I know there are other good fluids, this is just one with UOA showing that it works.



steved

 

[JKinney]

steved; are you still overfilling with the fast coolers?

 

[steved]

steved; are you still overfilling with the fast coolers?

Overfilling enough to bring the "full" level since the FastCoolers add almost 2 quarts... but I'm only filling up to the OE fill plug with the truck sitting level.



If I filled as instructed in the FastCoolers, I would be inches over the OE fill plug (it would be submerged).



So in brief, no, I'm not any more full than the OE fill level (although I have more volume of oil).



steved

 

[DaveRodgers]

Steved - Pre FastCoolers at 235* +.



What are your temps now with the FC's?

 

[steved]

Steved - Pre FastCoolers at 235* +.



What are your temps now with the FC's?

So far, the hottest outside ambient temps I have had the pleasure of seeing is 85*F... I reached 180*F with my 1500 poundish slide-in camper on the back towing a small (under 1500#) trailer coming out of Key West.



Those 230*F+ temps were usually running long distances at 65mph in 90*F+ temps... but they were not uncommon. And it is VERY dependent on ambient temp... I was coming across texas at 117*F running 235*F in the trans (no coolers), as soon as the weather front passed and ambient temps dropped to near 90*F, trans temps dropped accordingly, albeit slowly...



I have noticed the faster you're turning the input, the hotter the trans runs... running 2k RPMs on the motor usually gives pretty low temps, but start spinning 2500 RPM (75mph in my case) and the temp will rise pretty quick.



As it stands now, we haven't had but one day about 40*F since I left Key West in early December... the guage is lucky to move off "cold" at 100*F.



steved

 

[Buffalo]

Steved,



Thanks for the great report. Do you change the trans. fluid often? How many miles? Did the Amsoil do better than the stock fluid?



Where did you put the sensor, for the guage, in the transmission? Do the Fast Coolers have a port for the guage?



I wouldn't mind trying the "Coolers" but, I installed a trans. filter on the passenger side of the trans. So, I could only get one cooler on the drivers side of the trans.



Thanks.



Joe F. (Buffalo)

 

[steved]

Steved,



Thanks for the great report. Do you change the trans. fluid often? How many miles? Did the Amsoil do better than the stock fluid?



Where did you put the sensor, for the guage, in the transmission? Do the Fast Coolers have a port for the guage?



I wouldn't mind trying the "Coolers" but, I installed a trans. filter on the passenger side of the trans. So, I could only get one cooler on the drivers side of the trans.



Thanks.



Joe F. (Buffalo)

I changed the fluid quite a bit since last summer after having all sorts of trouble with Royal Purple Synchromax. I ran two batches of Synchromax, three batches of Redline MTL, and this fill of Amsoil MTF. Most of it was :flushing" and just changing to see if shifting improved.



The Amsoil shifts a lot better than the OE fluid... I can at least shift a little bit with Amsoil when its cold, unlike OE fluid that required double clutching until the fluid warmed. The Amsoil shifts the best of all the fluid I've tried. But even at 10k, it is starting to fall off in shifting performance. The "know" at BITOG indicated the fluid has sheared some and that might be the cause of the downslide in shifting.



I had/have the temperature sensor mounted in the middle of a PTO cover. I drilled the PTO cover and brazed an 1/8" NPT collar onto it that I mount the sensor in. I do believe the FastCoolers have a sensor port (don't really remember since I didn't need it). You know they sell just a single cooler for applications like yours??



steved