343 will last, not sure who has proven it won't. I have almost 6,000 miles on mine with 620ft/lbs going through it.
Builds Cnorm5623's Cummins build (1 Viewer)
- Thread starter cnorm5623
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
- Thread starter
- #242
Is it stock or did you put a transgo kit or anything else in it?
Transgo kit, details and pics are in my build thread. I think I did drill the holes out between truck and hot rod size or maybe I went full hot rod, I would have to look. Lol. There was quite a bit of flairing before the kit between shifts after the kit it is solid.
Dirty Koala
SILVER Star
I had a conversation with Dustin about a week or so ago about an NV4500 kit. He does sell the kit minus the auto trans parts (computshift, converter, bellhousing). The kit is about $3500 (don't quote me). I also asked about an adapter to mate the NV4500 to an HF2AV, which he will make utilizing a 2wd NV4500 main shaft. Price for a single adapter is about $850...$700 if he is making more that 1 to account for setup time. That is cheaper than buying the NV4500 to 60 series split case adapter...plus you don't have to go buy and rebuild a 60 series case. This is most likely the route I will be taking when the time comes.
maxamillion2345
Franken-80
I'm not so confident, the torque impulse of a cummins is different than that of a v8 even at 620 and with high torque right off the line its still different than a v8. I'll be watching turbophils build to see though. Him and cjmoon seem to have their tranny game on lock and I know they want to build some power so they're the ones to watch.
At 30k with a 700 ft lbs cummins I'll beleive its proven.
Good to hear as I'm down in Columbus and will be picking up my first 80 series a week from tomorrow. The eventual plan is the 6BT NV4500 swap.....might consider a 4BT though too.
NV4500's won't take that I would bet. Guess we will see. If that's the plan go 5600 now.
maxamillion2345
Franken-80
Heck yeah they will man, that a whole lot more. 700 ft lbs isn't too far out for VE pumped engines, and almost easily attainable with a p pumped 5.9. Lots of 2nd gens out there hitting 700+ ft lbs. Stock clutch won't hold that but an NV4500 will definitely.
Yeah I just did some reading seems like they are all over the place some guy saying he has broken 3 at 611ft/lbs another guy saying he beats on his with 1100ft/lbs. But there are enough aftermarket parts to build it strong enough
maxamillion2345
Franken-80
Then again I blew all my money on tons and other crap and so I'm running a getrag, they're 'okay'. 
maxamillion2345
Franken-80
Yeah, I know quite a few guys building big power with stock nv4500s. I know you can break em and that there are billet shafts you can swap but generally they're tough tough trannys. Anyway I didn't really mean to crap post cnorm's build here. I look forward to seeing what the stock autos can do but personally I'm shooting for an NV4500 in the future.
I have a split case already, $250 rebuild, $650 for AA NV4500 to Split. My question is what clutch pedal and master cylinder setup would work best. HDJ80 Clutch pedal?? 60 pedal?? Dodge pedal??? The other reason I would like the NV4500 is a true Part time 4 wheel Drive. To get my lockers to operate I figure I would have to trick the CDL switch some how. Sounds like a body lift is needed for sure.
Dirty Koala
SILVER Star
I plan to use a new HDJ80 pedal, haven' figured out the master cylinder yet. I expect I may need to modify the stroke to get the correct ratio.
I already part-timed my HF2AV case and replaced all the seals while I was at it. The 60 series cases have a bit of a whine to them, which is one of the reasons I would like to retain the 80 case. It's nice to have the option. I am hoping this can be accomplished without a body lift, Dustin believes it can be accomplished with some tunnel massaging (1/2" on either side).
I am kinda a fan of the whine from the t case ha ha. I suppose a hammer could fix the trans tunnel issues if it is only a half an inch on each side.
I used a manual 80 series clutch and brake pedal. Easy to source from Japan. Same with the master cylinder.
Is there a known way to bolt the NV4500 to the 80 case? If so does the 4500 need to be the 2WD version or the 4WD version and does it have to have a certain # of splines?
Dirty Koala
SILVER Star
I posted details on this 13 posts above. There us s theory and dustin will build it, but it has not been done as of yet.
Oops, I must have missed that. When I finally do my diesel swap I would like to use the NV4500 and retain my 80 case so I hopefully don't have to mess with the rest of the drive line. I'm still trying to get up to speed as what works with what. It appears as though AA only has adapters to mate the 4500 to earlier cases.
Last edited:
RockJock82
Sometimes you have to kick a little A$$
Would you happen to have the part numbers?
I went through Dave Stedman and just told him what I wanted. I don't have his contact info right now but others have used him. I'm pretty sure his info is in numerous threads.
