Recent Topics
38" Riding Mower, idler spring/pulley bad?
by Crispysea
22 minutes 58 seconds ago
Is Aerospace 303 still for
by MetalSlug
31 minutes 30 seconds ago
Shell AV-L ECT C2C3 0w30 vs Ravenol SSO 0w30
by Janusz
33 minutes 36 seconds ago
Havoline PSF $22.92 / 12 Pack @ Amazon.com
by Farmer
Today at 12:59 AM
2015 Silverado Valance Trim
by Realtech214
Yesterday at 10:58 PM
Motorcycle Tire Direction question?
by maverickfhs
Yesterday at 10:02 PM
Worried when I leave home..
by Chris142
Yesterday at 09:38 PM
FYI AC Delco Dexron 6
by WyrTwister
Yesterday at 07:56 PM
Jeep Compass?
by ford46guy
Yesterday at 07:52 PM
oil for 2009 Volvo XC 70 32
by foresthawk
Yesterday at 07:39 PM
Help me pick atf, transfer case, and diff fluid
by Randy_270
Yesterday at 07:30 PM
Best brakes
by M1Accord
Yesterday at 07:11 PM
SSA death benefit question
by 04SE
Yesterday at 07:00 PM
What type of oil comes in a 2017 Silverado ?
by mtlineman
Yesterday at 05:38 PM
2016 FLTRU Amsoil MCV 20W50, 5229 miles
by nocarb
Yesterday at 05:31 PM
Pennzoil HM Oil At WM
by BlueOvalFitter
Yesterday at 05:18 PM
Sorry for beating a dead horse concerning BC 0w40!
by MichaelDCRogers
Yesterday at 05:15 PM
FOG vs Driving lights
by Eddie
Yesterday at 04:36 PM
Cell Phone for a Trip
by sleddriver
Yesterday at 04:21 PM
The richest woman on earth drives a
by skyactiv
Yesterday at 04:20 PM
Newest Members
Wolfie, JR96, apollo18, CarsSimplified, Garretts77
62925 Registered Users
Who's Online
14 registered (190E26FTW, 4WD, Crispysea, gathermewool, CapriRacer, Drosselmier), 960 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
62925 Members
66 Forums
271289 Topics
4499560 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#3211762 - 12/09/13 09:55 PM Any value in getting TBN + TAN of trans oil?
dparm Offline


Registered: 04/19/10
Posts: 13345
Loc: Chicago, IL
I am getting my car's dual-clutch fluid changed this Friday. The factory fill will have around 52k on the clock; it is Pentosin FFL-4, and is actually very similar to a Dexron/Mercon ATF, but with GL-4 protection.

Is there any value in getting the TBN and/or TAN measured?

FWIW, BMW classifies it as a lifetime fluid (yeah right).
_________________________
2017 Chevrolet Corvette Grand Sport

Top
#3211771 - 12/09/13 10:04 PM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
chubbs1 Offline


Registered: 06/09/10
Posts: 4574
Loc: Merritt Island FL, USA
It would be nice to see how this "lifetime" fluid is holding up and TBN/TAN would be one of the only reasonable ways to check that. It is your money so it is easy for me to say. You are changing it anyway so it doesnt really benefit you to fork out the extra money.
_________________________
'12 Charger SXT
QSUD 5w30 OEM filter

'12 Charger SXT
Edge FST EP 5w30 OEM (Mine;)

'11 Hyundai Sonata GLS
QSUD 5w20 OEM Filter


Top
#3211792 - 12/09/13 10:30 PM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
Raybo Offline


Registered: 02/14/09
Posts: 62
Loc: Clearwater ,Florida
Huge value. TAN is very important to see how hard the trans is on the fluid. Tell's you exactly how long that type fluid should stay in the trans before it gets acidic.

I like and have used many times:

wearcheck.com

There the big boys in the UOA business and TAN is always included in there UOA. $25.

Top
#3211857 - 12/09/13 11:50 PM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
daves87rs Offline


Registered: 02/23/09
Posts: 16516
Loc: Michigan
Would be good to learn....
_________________________
Whatever you are, be a good one.

Top
#3212005 - 12/10/13 07:23 AM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
Donald Offline


Registered: 03/21/04
Posts: 19214
Loc: Upstate NY
You should get TAN for non engine lubricants.

Its included with tests from Polaris that are around $18.50 when you buy 10.
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


Top
#3212011 - 12/10/13 07:27 AM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
btanchors Offline


Registered: 04/10/04
Posts: 739
Loc: Herndon, VA
TAN would be very valuable, but TBN not valuable. The reason is that a transmission is a "closed" environment. In an engine, one of the oil's jobs is to neutralize the acids that form as a result of combustion gasses "leaking" past piston rings into the oil. In a transmission or differential, the lubricant does not have this function as nothing "leaks in" that causes acid to form - so the lubricant doesn't need to neutralize acids.

However, if a lubricant is stressed due to being overheated, its acid level will rise. This is what TAN is designed to indicate.

So - you want TAN, but not TBN. TBN would be a waste of money.

Others more knowledgeable than I - did I get this right? I think I am on target but I defer to the experts out there...

Top
#3213567 - 12/11/13 03:37 PM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
MolaKule Offline


Registered: 06/05/02
Posts: 18203
Loc: Iowegia - USA
Originally Posted By: dparm
I am getting my car's dual-clutch fluid changed this Friday. The factory fill will have around 52k on the clock; it is Pentosin FFL-4, and is actually very similar to a Dexron/Mercon ATF, but with GL-4 protection.

Is there any value in getting the TBN and/or TAN measured?

FWIW, BMW classifies it as a lifetime fluid (yeah right).


Being it is factory fluid left in that long, I doubt you are going to discover anything useful, except once you see the analysis, you may want to change the OCI.

For FF fluids, I would want to compare the UOA against the VOA in terms of changes in viscosity.
_________________________
In the beginning, the world was without form and void and darkness was upon it...then I found the coffee pot! smile

Top
#3213727 - 12/11/13 06:46 PM Re: Any value in getting TBN + TAN of trans oil? [Re: MolaKule]
martinq Offline


Registered: 07/22/05
Posts: 1041
Loc: ON, Canada
Originally Posted By: MolaKule
Being it is factory fluid left in that long, I doubt you are going to discover anything useful, except once you see the analysis, you may want to change the OCI.

For FF fluids, I would want to compare the UOA against the VOA in terms of changes in viscosity.

+1 and +1

Can you get a VOA while you're at it?

Top
#3214335 - 12/12/13 10:08 AM Re: Any value in getting TBN + TAN of trans oil? [Re: martinq]
dparm Offline


Registered: 04/19/10
Posts: 13345
Loc: Chicago, IL
Originally Posted By: martinq
Originally Posted By: MolaKule
Being it is factory fluid left in that long, I doubt you are going to discover anything useful, except once you see the analysis, you may want to change the OCI.

For FF fluids, I would want to compare the UOA against the VOA in terms of changes in viscosity.

+1 and +1

Can you get a VOA while you're at it?


I don't have a bottle of FFL-4. It's expensive stuff ($25/L+). I'll dig around and see if anyone has already done a VOA.
_________________________
2017 Chevrolet Corvette Grand Sport

Top
#3215937 - 12/13/13 08:57 PM Re: Any value in getting TBN + TAN of trans oil? [Re: dparm]
bruce381 Offline


Registered: 06/23/05
Posts: 3327
Loc: Millbrae, CA
TAN and TBN can be used in ATF but you must have a base line to work from

Top