What is best NV4500 oil? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

farmero · 03-05-2014, 06:59 PM

People tell me Castrol synthetic. I am having a hard time finding it around here. Must I special order this gold? I have these brands available local. Mobil 1 synthetic, Royal Purple synthetic and a couple others. Prices range from $9 up to $20 for the Mobil 1. I just busted my nuckles rebuilding this trans and don't want to make a wrong move on the oil. This is for my work truck and grain hauler.

ryanroo · 03-05-2014, 11:09 PM

the GM or dodge fluid is what i run. i forget the name of the fluid but it is the same from either brand. its not cheap, but it is what the syncros want.

Chrysler # 4874459
GM #12346190

castrol syntorq is also the OK i believe. i usually run the dealership stuff. who ever has the better price. there are a few places on the net that you can order it as well.

Redcap · 03-05-2014, 11:17 PM

Castrol SynTorque 75W-90.

The GM dealer part number is PN 12346191. It is the exact same oil.

**Dieselwrencher** · 03-06-2014, 12:00 AM

Dodge calls it synchromesh. We get it from our supplier in Minnesota and it's about half the price of every where else.

farmero · 03-06-2014, 08:44 AM

OK guys, I did more checking last night and the general agreement is to use Castrol Syntorq (Watch that spelling closely) and Dealer oil. I had purchased some Royal Purple and some told me that was the worst thing I could put in the trans. Returned that last night. I have a connection with GM so I will find out today about oil from them. Thanks

roxxx · 03-06-2014, 09:17 AM

Long thread on the dodge forums.. the oil is like gold ... unless you are crafty and cross it with a GM part number and buy it for 5 bucks a litre on sale in Canada anyway

gm (PN 12346191) this is one of the gm part numbers

doubleclucker · 03-06-2014, 09:35 AM

Heres the stuff for us North of the Border guys-
Right from the stealership...'Genuine Generous Motors'
#10953477
$25 dollars a litre taxes in ... OUCH!
mopar-4874459 subseded 4367579 or vice/versa costs even more!
I used the factory fluid then if I have a synco go bad I can't easily blame the oil I used; but if i used anything else well...

Wrecked1982 · 03-07-2014, 09:28 AM

is castrol synchrotorque available in canada cheaper?

whitedog76 · 03-07-2014, 10:45 AM

I guess a 75-85 GL4 oils is what's recommended. Don't use GL5 oil, the additive package messes with the synchronizers and brass components.

http://www.allpar.com/mopar/transmissions/NV4500.html

DirtyLarry · 03-07-2014, 12:27 PM

NV4500’s are a finicky transmission to begin with I personally won’t take chances with any oil other than the OEM oil even if it does cost a few bucks more per quart. I agree with the part numbers Ryanroo posted.

I do like the idea of added capacity though. We'll see how the coolers and added capacity workout in time.

**Dieselwrencher** · 03-07-2014, 05:10 PM

We've ran the coolers that are all aluminum and have had good luck with them. On 2nd gen dodges you can't run the LH side one though.

farmero · 03-07-2014, 08:05 PM

Well, I could not find any GM oil around here. I did find Amsoil synthetic. The label states that it is a direct replacement for GM part no.12346190. It has just a light oil color to it. I put four qts in for now. On my test drive it shifts very nice. It does have a slight werring noise when in motion. First time I ever looked at the inside of one of these. It has been a challenge. Thanks.

95 S_Trucker · 03-07-2014, 11:13 PM

Quote:

Originally Posted by farmero

Well, I could not find any GM oil around here. I did find Amsoil synthetic. The label states that it is a direct replacement for GM part no.12346190. It has just a light oil color to it. I put four qts in for now. On my test drive it shifts very nice. It does have a slight werring noise when in motion. First time I ever looked at the inside of one of these. It has been a challenge. Thanks.

Outten, Quigley, Faulkner, and Kelly could have gotten the fluid for you. All are within 20 minutes of you.

You are right with the fluid level. The capacity is one gallon.

95 S_Trucker · 03-07-2014, 11:17 PM

Quote:

Originally Posted by Dieselwrencher

Dodge calls it synchromesh. We get it from our supplier in Minnesota and it's about half the price of every where else.

Synchromesh is for the nv1500, nv3500, and nv5600. It's about the same consistency as 5w30. It's not recommended in the nv4500.

Both gm and dodge use the synchromesh name.

'63GENIII · 03-25-2014, 12:33 AM

Quote:

Originally Posted by farmero

Well, I could not find any GM oil around here. I did find Amsoil synthetic. The label states that it is a direct replacement for GM part no.12346190. It has just a light oil color to it. I put four qts in for now. On my test drive it shifts very nice. It does have a slight werring noise when in motion. First time I ever looked at the inside of one of these. It has been a challenge. Thanks.

I'm running the same stuff, no problems after approximately 8500 miles. Easy to get too.

03-05-2014, 11:09 PM	#2
ryanroo Senior Member Join Date: Apr 2004 Location: sw colorado Posts: 2,720	Re: What is best NV4500 oil? the GM or dodge fluid is what i run. i forget the name of the fluid but it is the same from either brand. its not cheap, but it is what the syncros want. Chrysler # 4874459 GM #12346190 castrol syntorq is also the OK i believe. i usually run the dealership stuff. who ever has the better price. there are a few places on the net that you can order it as well. __________________ 72 K20 12v build 72 K20 "parts truck" A place for your diesel swap questions

03-05-2014, 11:17 PM	#3
Redcap Registered User Join Date: May 2010 Location: Lewis County, WA Posts: 1,523	Re: What is best NV4500 oil? Castrol SynTorque 75W-90. The GM dealer part number is PN 12346191. It is the exact same oil. __________________ '77 K35 - 454, SM465/NP205, 4.56 D60/14bFF

03-06-2014, 12:00 AM	#4
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: What is best NV4500 oil? Dodge calls it synchromesh. We get it from our supplier in Minnesota and it's about half the price of every where else. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

03-06-2014, 08:44 AM	#5
farmero Registered User Join Date: Jun 2013 Location: Allentown Pa. Posts: 36	Re: What is best NV4500 oil? OK guys, I did more checking last night and the general agreement is to use Castrol Syntorq (Watch that spelling closely) and Dealer oil. I had purchased some Royal Purple and some told me that was the worst thing I could put in the trans. Returned that last night. I have a connection with GM so I will find out today about oil from them. Thanks

03-06-2014, 09:17 AM	#6
roxxx Registered User Join Date: Sep 2013 Location: Didsbury Alberta Canada Posts: 177	Re: What is best NV4500 oil? Long thread on the dodge forums.. the oil is like gold ... unless you are crafty and cross it with a GM part number and buy it for 5 bucks a litre on sale in Canada anyway gm (PN 12346191) this is one of the gm part numbers

03-05-2014, 06:59 PM	#1
farmero Registered User Join Date: Jun 2013 Location: Allentown Pa. Posts: 36	What is best NV4500 oil? People tell me Castrol synthetic. I am having a hard time finding it around here. Must I special order this gold? I have these brands available local. Mobil 1 synthetic, Royal Purple synthetic and a couple others. Prices range from $9 up to $20 for the Mobil 1. I just busted my nuckles rebuilding this trans and don't want to make a wrong move on the oil. This is for my work truck and grain hauler.

03-06-2014, 09:35 AM	#7
doubleclucker Registered User Join Date: Jan 2014 Location: ONTARIO CANADA Posts: 132	Re: What is best NV4500 oil? Heres the stuff for us North of the Border guys- Right from the stealership...'Genuine Generous Motors' #10953477 $25 dollars a litre taxes in ... OUCH! mopar-4874459 subseded 4367579 or vice/versa costs even more! I used the factory fluid then if I have a synco go bad I can't easily blame the oil I used; but if i used anything else well... Attached Images __________________ 100:1 low gear!

03-07-2014, 09:28 AM	#8
Wrecked1982 Registered User Join Date: Feb 2011 Location: Cold Canada Posts: 310	Re: What is best NV4500 oil? is castrol synchrotorque available in canada cheaper?

03-07-2014, 10:45 AM	#9
whitedog76 Registered User Join Date: Jan 2014 Location: Peoria, IL Posts: 1,450	Re: What is best NV4500 oil? I guess a 75-85 GL4 oils is what's recommended. Don't use GL5 oil, the additive package messes with the synchronizers and brass components. http://www.allpar.com/mopar/transmissions/NV4500.html

03-07-2014, 12:27 PM	#10
DirtyLarry Windy Corner of a Dirty Street Join Date: Jun 2003 Location: Pueblo West, Colorado Posts: 2,926	Re: What is best NV4500 oil? NV4500’s are a finicky transmission to begin with I personally won’t take chances with any oil other than the OEM oil even if it does cost a few bucks more per quart. I agree with the part numbers Ryanroo posted. I do like the idea of added capacity though. We'll see how the coolers and added capacity workout in time. __________________ Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles Instagram

03-07-2014, 05:10 PM	#11
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: What is best NV4500 oil? We've ran the coolers that are all aluminum and have had good luck with them. On 2nd gen dodges you can't run the LH side one though. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

03-07-2014, 08:05 PM	#12
farmero Registered User Join Date: Jun 2013 Location: Allentown Pa. Posts: 36	Re: What is best NV4500 oil? Well, I could not find any GM oil around here. I did find Amsoil synthetic. The label states that it is a direct replacement for GM part no.12346190. It has just a light oil color to it. I put four qts in for now. On my test drive it shifts very nice. It does have a slight werring noise when in motion. First time I ever looked at the inside of one of these. It has been a challenge. Thanks.



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