i already only use mobile 1 motor oil, but i was wounding how good the mobile 1 auto trans fluid and the rearend oil are. i would assume that they are good too.

 

Yup.

 

i run only MOBIL 1 fluids also,and i have a case of the synthetic ATF waitin to go in my trans, i would think that it would be as good as there other fluids.

------------------
87 IROC-z 305 TPI
Borg Warner T-5 fresh rebuild
10-bolt 3.73 Richmond gears rebuilt GM posi,
formerly BW 9-bolt w/3.45 gears(broke it)
Ported Plenum and Runners Homemade AFPR
ACCEL 8.8 wires, High output coil,and cap & rotor
Bosch platinum + 4 plugs
Ram Air w/ K&N filters,
MAF sensor screens removed, TB coolant bypass
Polyurethane tranny and torque arm mounts
Dynomax catback w/custom tips
K&N oil filter,Mobil 1 synth, Futura GLS Super Sport tires 265/50/15 rear and 235/60/15 front mounted on 86 monte carlo SS rims ,

400 sbc and a 6 spd in the works

 

I have found that (and many other trans shops agree with me) Mobil One not to be as good as their regular Dexron 3. This was the results from the last 4 years up to a year ago, I have no new results(comparisons)in this last year since that time. So it is possible for them to have "improved", "changed" their fluid since then. My opinion is find something that has proven itself (5 years & more) Amsoil #1, Redline #2, etc. These oils have proven track records. I'm sure that transfixleo would agree with Amsoil or Redline.
Hope This Helps!!!

 

so synthetic isnt better for ATF?

 

and what about the Mobile 1 rear gear oil? if its not good, what is best?

 

That's not what he's saying. He's just not recommending the Mobil 1 ATF.

In general, a synthetic that meets the specs of the manufacturer's requirements will be a better, longer-lasting fluid than the same spec petroleum base fluid. That goes for engine oil, tranny fluid, gear lube, grease, hydraulic fluid, etc.

But, blanket statements like that rarely stand up to the microscope. So, do like Pro Built says and go for AMSOIL or Redline ATF. I haven't been disappointed in the last 18 years of AMSOIL use.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ4 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (ported World 305 heads, Crane PowerMax cam, Hooker 2055 headers, 3" Catco cat & 3" catback w/Flowmaster, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

AMSOIL Series 2000. If you have posi, you don't need to put in that expensive little tube of friction modifier.

 

Iwas of the opinion that Mobil 1 was not suitable for our "old" engines as the clearance specifications in new engines are much smaller than ours.
I've always used Torco 15/40 mineral oil and never has a problem
PM

 

I have no problem with Amsoil (I have used it) or Redline (I know others have with no problem). I will say this, I have Mobil 1 full synthetic in my Dakota 4X4 and this is a high risk tranny as far as lube goes. In fact the tranny had been done by someone else two years ago and it launched the O/D section geartrain (common problem). I expect no problems with the Mobil 1 Synthetic but I also have a TransGo Shift Kit in it and a TruCool cooler.

 

I use Mobil 1, oil, ATF and gear lube, but I've been told that Redline is the best. I may use Redline if I hit the lottery but right now it is a little too pricey.

 

if u like mobil 1 try amsoil

 

i just put in some b&m trick shift original tranny fluid and it made my tranny shift better, my tranny doesnt feel like is going to brake a mount anymore it shifts firm with the nice whip lash. who else has tried and it, and how did u like it.

 

Be careful with the b&m. If memory serves they don't want it in a lock up converter. Not sure though.

 

I use Mobil-1 synthetic trans fluid in my trans, along with additive that the builder recommended. Works fine so far.

As a matter of fact, they told me not to use anything BUT Mobil-1...maybe because it mixes well with the additive??

But I'm sure Redline, Amsoil or others are just as good if not better..