Recent Topics
2015 VW GTI autobahn oil questions
by Skyalbo
06/24/18 11:28 PM
Corrosion in the garage - salt or humidity?
by Kurtatron
06/24/18 11:13 PM
Darn dogs
by AZjeff
06/24/18 10:21 PM
New GC?
by Bullwinkle007
06/24/18 10:04 PM
The guy with the plexiglass head on you tube
by andyd
06/24/18 09:21 PM
'07 Pacifica Timing Belt Replacement success
by 92saturnsl2
06/24/18 09:10 PM
SAE 90 v 85/140
by Knuckle078
06/24/18 09:10 PM
Mobil 1 5W30-HM 5,011 mi, 1999 Ford Escort
by WA1DH
06/24/18 08:45 PM
what happened to merk
by ernied
06/24/18 08:34 PM
Schaeffer's oil reviews on Amazon
by zfasts03
06/24/18 07:41 PM
Decent MP3 player
by Ed_T
06/24/18 07:08 PM
Letgo
by Donald
06/24/18 06:52 PM
Tire buying advice
by supton
06/24/18 06:23 PM
Two versions of M1 5w30 ESP now?
by Patman
06/24/18 06:21 PM
No older cars in New York State?
by Oldtom
06/24/18 06:19 PM
2009 Taurus strut mount noise
by terry274
06/24/18 04:38 PM
A3/B3 vs A3/B4, big difference or irrelevant?
by FordCapriDriver
06/24/18 03:36 PM
2003 Honda power steering problem
by hogpops
06/24/18 03:29 PM
Public Service Announcement: Flush Your HW Heater
by gathermewool
06/24/18 03:25 PM
Fellow 2AZ-FE toyota owners: what oil are you usin
by car51
06/24/18 03:21 PM
Newest Members
lozpxs, danthemanx07, FunktasticLucky, Knuckle078, penncove
65317 Registered Users
Who's Online
23 registered (citationxeleven, dishdude, 4WD, Bailes1992, chainblu, ctechbob, 1 invisible), 804 Guests and 37 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65317 Members
67 Forums
285952 Topics
4771878 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4621608 - 01/02/18 10:50 AM lube for Eaton/Detroit Tru-Trac
code5coupe Offline


Registered: 05/17/04
Posts: 39
Loc: Poway, CA
Summit, from whom I bought the unit, says use conventional gear lube. Why not full synthetic? Anyone had bad results using synthetic?

Top
#4621640 - 01/02/18 11:17 AM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
code5coupe Offline


Registered: 05/17/04
Posts: 39
Loc: Poway, CA
Sorry, guys, I forgot I'd already posted this some time ago....

Top
#4621643 - 01/02/18 11:19 AM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
rideahorse Offline


Registered: 01/01/15
Posts: 91
Loc: Charles City, Iowa
bop Because aside from what all the coolade drinkers say. There are places that conventional oil is better than syn oils.

Top
#4621656 - 01/02/18 11:25 AM Re: lube for Eaton/Detroit Tru-Trac [Re: rideahorse]
code5coupe Offline


Registered: 05/17/04
Posts: 39
Loc: Poway, CA
We've established that. The question is "why"?


Edited by code5coupe (01/02/18 11:26 AM)

Top
#4621700 - 01/02/18 12:12 PM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
rideahorse Offline


Registered: 01/01/15
Posts: 91
Loc: Charles City, Iowa
Because conventional allows the true-track to function the way it was designed. Syn has too much drain off. It does not have the right friction properties for it to work right.

Top
#4621865 - 01/02/18 03:05 PM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1141
Loc: Winchester, Indiana
And where's your DATA to support that, rideahorse?

Use what the manufacturer recommends here... which is a good mineral oil, without friction modifiers.

Detroit Truetrac
Q: What kind of oil should I use? Can I use synthetic? Do I need friction additive/modifier?
A: A quality petroleum/mineral based oil works best in the Truetrac units. We do not recommend synthetic oil. Friction additive/modifier is not required.

Top
#4621891 - 01/02/18 03:31 PM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
4wheeldog Offline


Registered: 04/23/12
Posts: 1462
Loc: East Mountains, NM
Huh. I have had a Truetrac in my 4runner for about 100k miles.
I used conventional for breakin, and boy did it get hot!
After 50 miles or so, I put in Redline, (Which immediately ran much cooler) and that is what I have used ever since.
No mention at the time of installation that synthetic was not recommended.
It works great, but maybe it would work even better with mineral?
Who knew?

Top
#4664540 - 02/13/18 07:39 AM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
code5coupe Offline


Registered: 05/17/04
Posts: 39
Loc: Poway, CA
The entire rear end depends on the diff lube; gears, limited-slip, wheel/axle bearings, pinion bearings. Do I use what's best for one component (LSD) at the expense of the rest of the components?
As I understand it, the synthetic lube does not hurt the Tru-Track, it just doesn't allow it to lock up as readily....which should, in theory anyway, make it last longer.

Top
#4664906 - 02/13/18 03:25 PM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
JZiggy Offline


Registered: 10/12/10
Posts: 780
Loc: GA
I have a TrueTrac and I use the Redline NS gear oil. So it is synthetic but does not have the "limited slip" friction modifiers.

I guess if the oil is too "slippery" the torque bias of the unit is reduced.

In the past I have used various other oils with friction modifier and the unit still seemed to work properly. I don't think a friction modified oil would hurt the TrueTrac... I don't see how that could be possible.
_________________________
Basic,, Simple,

Top
#4669783 - 02/18/18 01:09 PM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
Darren_L Offline


Registered: 10/26/10
Posts: 23
Loc: Indianapolis, In.
I have been beating on my 12 bolt TrueTrac for 7 years running nothing but Red Line Heavy Shockproof gear lube with zero issues. Power is provided by a 700hp 496 with a Tremec 6 speed and with a set of sticky M/T DOT cheater slicks, it has easily handled all the abuse I've thrown at it. Differential runs cool, quiet, smooth and both rear tires have always locked when tires spin.
_________________________
71 Chevelle 496BBC Brad Penn 10w30
04 Silverado Valvoline FS 5w30
96 Impala SS Valvoline FS 10w30
99 Civic MaxLife 5w30
96 Ranger MaxLife 5w30


Top
#4670850 - 02/19/18 12:21 PM Re: lube for Eaton/Detroit Tru-Trac [Re: code5coupe]
BrocLuno Offline


Registered: 09/06/15
Posts: 5528
Loc: Kalifornia Kollective
There you go - Shock Proof IS #1 for keeping them alive laugh
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

Top