I did for the last 8K but it seemed to run hotter with the Amsoil transaxle special stuff. Back to 90W now.
6BT/NV4500/HF2AV Build Thread - New Adapter
- Thread starter lostih
- Start date
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Mine leaked so much of the expensive NV4500 special synthetic stuff that I just run regular gear oil in it. If I can get it to not leak anymore I'll swap back to that special synthetic stuff.
Would love to have AWD for winter country and city roads again. Would also love stronger axles but gotta do one thing at a time.
Edit: the only other thing I'd like to do would be pull the PTO cover off the NV4500, drill and weld bungs for 1/4"NPT, then 90 degree elbows to barbed hose fittings with a piece of clear silicone tubing between them so I can see fluid level, maybe weld a couple fins on either side to protect it. Just not sure what temp range it would need to handle.
Would love to have AWD for winter country and city roads again. Would also love stronger axles but gotta do one thing at a time.
Edit: the only other thing I'd like to do would be pull the PTO cover off the NV4500, drill and weld bungs for 1/4"NPT, then 90 degree elbows to barbed hose fittings with a piece of clear silicone tubing between them so I can see fluid level, maybe weld a couple fins on either side to protect it. Just not sure what temp range it would need to handle.
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Dirty Koala
SILVER Star
I might be...working with a friend of mine that owns a machine shop
@Wheelingnoob @thegogglesdonothing and I all have the same NV4500 cooler that replaces the driver side PTO cover. @thegogglesdonothing and both have the version that includes a sight hole so you can visually check the fluid level.
Do you have a link for the cooler?
Dirty Koala
SILVER Star
Sure do. They come as a pair, but the passenger side will have front driveshaft clearance issues. @Wheelingnoob and I split a set.
'89-'15 Dodge Cummins Manual Transmission Fast Coolers
That's pretty cool. Pun intended.
ZING!!!!!
They might be worth a look if I was splitting with another member, I'm sure the extra fluid capacity would have its merits, but the last time I purchased the special fancy NV4500 HD gear oil it was like $26 (CAD) a quart, just a heads up, the cooler might be the cheap part of the upgrade.
The Amsoil Trans-Axle oil is cheaper yet still qualifies for fancy legit stuff for the tranny.
Went to the amsoil website, seems like this is the one: Manual Transmission & Transaxle Gear Lube 75W-90
Was about to ask you for a link and then figured I could do that myself..
As to how many quarts, the below link says the factory spec is 4 (without cooler) but many of them run 5 quarts, and fill from the shifter tunnel.
If I pull my trans again for a HF2AV swap, I'm gonna weld a bung higher up to fill from a higher point, and may just install a sight glass plug in the factory 3/4NPT fill hole.
For those not in the know, you can just buy one from summit for $8
Summit Racing® Weld-In Bungs SUM-220074
Summit Racing® Weld-In Bungs SUM-220074
NV4500, how many quarts? - Dodge Cummins Diesel Forum
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Fluid - NV4500Transmission.com
I used this recently. I believe I got from Grangier and it was a tad cheaper than the other stuff. I need to buy some more since in deep into tranny swap at the moment. Seem like high tech fluid is more common now as everything now seems to need "special" oils.
I used this recently. I believe I got from Grangier and it was a tad cheaper than the other stuff. I need to buy some more since in deep into tranny swap at the moment. Seem like high tech fluid is more common now as everything now seems to need "special" oils.
Nice find!! Is this what you bought from grainger?
MOBIL Mobil Delvac 1 Transmission Fluid 50 - 1MRG2|122208 - Grainger
MOBIL Mobil Delvac 1 Transmission Fluid 50 - 1MRG2|122208 - Grainger
I believe so. When I was looking I think they were going through a name and packaging change so it was hard to find any good info on it.
This is a bump, but I have a question:
The adapter pattern doesn't match the output housing off the dodge, it seems to either match the split case/toyota 60 series or the dodge trans.
Can we get a picture of the adapter plate in place, and how you did your transfercase/transmission bushings to the skid plate crossmember assembly?
I'm thinking either the adapter is for the AA adapter or something. The dodge output is a similar 6 bolt in a hex type pattern to the HF2A case. If you removed that output case (which I'm not sure you could) that would shorten things up alot.
Edit: actually, I'm thinking this could be simplified with a very simple adapter plate and the AA shaft, which is basically a socket you slide over the 29 splined shaft output off the NV4500 after you cut it down.
The other end is 19 spline which is for the split case, but I believe it is the same as the HF2A, it may be longer and have threads at the end which could just be shortened possibly.
The adapter would be a hexagonal plate with 12 bolt holes and and one center hole.
I'm going to have to look at it this week.
The adapter pattern doesn't match the output housing off the dodge, it seems to either match the split case/toyota 60 series or the dodge trans.
Can we get a picture of the adapter plate in place, and how you did your transfercase/transmission bushings to the skid plate crossmember assembly?
I'm thinking either the adapter is for the AA adapter or something. The dodge output is a similar 6 bolt in a hex type pattern to the HF2A case. If you removed that output case (which I'm not sure you could) that would shorten things up alot.
Edit: actually, I'm thinking this could be simplified with a very simple adapter plate and the AA shaft, which is basically a socket you slide over the 29 splined shaft output off the NV4500 after you cut it down.
The other end is 19 spline which is for the split case, but I believe it is the same as the HF2A, it may be longer and have threads at the end which could just be shortened possibly.
The adapter would be a hexagonal plate with 12 bolt holes and and one center hole.
I'm going to have to look at it this week.
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I have everything apart at the moment so I can get any photo necessary of the NV4500 & split case adapters. That damn rear main went on me.
EDIT. I jumped the gun. I assume you want to see the HF2A adapter.
Please do. Lots of pictures of the whole deal.
Sorry to hear about the rear main, I think mine just seeps oil from every seem. I keep filling it up instead of looking for leaks, at least the oil keeps the rust at bay.
I believe the rear main seal can be replaced without any work to the crank on the 6BT, which is a huge plus. Dropping the transmission and oil pan though...
You can remove the rear main retainer and install or install right on the back of the engine.
I believe Dustin's adapter is a spud shaft like you were stating just like the split case adapter.
Will Van
GOLD Star
I realize you simply modified the pickup tube to work with the later-style oil pan.
Any chance you know the PN for the later-style pickup tube? Or what years/trucks the late-style pan and pickup tube came on?
- Thread starter
- #78
Sorry I don’t. Although I believe I pulled the pan part number off a 24v 5.9 at work. I can see if that engine is still around and try and get some data plate info for it if you want.
I rebuilt the trans and added the new shafts last weekend and got everything bolted up this weekend. I am going to run 37's but want to keep the CG as low as possible and liked the idea of having a bit more clearance around the trans tunnel so I opted for a 1" body lift.
Ready for the new motor...
I removed the springs to make sure everything will clear at full bump. This was kind of a mistake I think. I ended up jacking the body back up as it made snaking the motor and trans in easier.
Great build thread. Thank you for sharing. In your opinion, would a 2 inch body lift provide adequate clearance for the Cummins/nv4500?
- Thread starter
- #80
With no suspension? I’d guess it would. I actually think 1” or even no body lift may be possible as well. Just depends where you put the motor.
