Recent Topics
Castrol GTX Diesel 15W40 CJ-4 9.88/ Gal at walmart
by TerryE
02/24/17 10:40 PM
Monroe's Spring 2017 rebate 3/1-4/30
by slacktide_bitog
02/24/17 10:24 PM
Center Console for the Caprice
by ls1mike
02/24/17 09:40 PM
What's the difference between cams that...
by horse123
02/24/17 09:21 PM
Which oil for '84 GM 366?
by Jason280
02/24/17 09:03 PM
Small cut in side of leather seat
by TmanP
02/24/17 08:53 PM
Dorman Aluminum Coolant Elbows Anygood ?
by Merkava_4
02/24/17 07:47 PM
Surfcity Garage Clayzilla used today
by mctmatt
02/24/17 07:33 PM
Whats the best off the shelf oil at walmart
by Fbm
02/24/17 07:18 PM
Walmart clearance motor oils - $3/qt
by 69GTX
02/24/17 06:32 PM
Buying a travel trailer..
by Soggydog
02/24/17 05:53 PM
PQIA analyzes five 5W-20s, two with issues, Feb 24
by Tom NJ
02/24/17 05:28 PM
J.D. Power 2017 Vehicle Dependability Study
by SubLGT
02/24/17 05:21 PM
2014 Pentastar 3.6l - Liquid Moly Engine Flush
by SavagePatch
02/24/17 05:03 PM
Engine Oils as Gear Oils....
by Shannow
02/24/17 05:02 PM
Virgin Motorcraft FL-820s C&P
by blupupher
02/24/17 04:58 PM
What House DIY maintenance you do yearly?
by maverickfhs
02/24/17 04:31 PM
Summer riding boots
by gman2304
02/24/17 04:24 PM
Mobil1 0w20 EP, 8068 miles, 2010 Civic
by Astro_Guy
02/24/17 04:16 PM
Pennzoil Platinum HM OK?
by DrRoughneck
02/24/17 03:35 PM
Newest Members
Geoff1200, ggw1957, jujufly, phrancke, Mbrock
60622 Registered Users
Who's Online
84 registered (69GTX, Alex_V, ag_ghost, 4WD, 2015_PSD, 6 invisible), 1709 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
60622 Members
66 Forums
261524 Topics
4314615 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: 13031
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).
_________________________
2011 BMW M3 sedan ZCP

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: 16240
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: 18036
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: 703
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: 17764
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.
_________________________
Parallel Lines have so much in common it is a shame they will never meet. 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: 1031
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: 13031
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.
_________________________
2011 BMW M3 sedan ZCP

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