Mobil1 has become the trans juice of choice for most folks who tow big horse
trailers, and full time RV'ers (who are mostly anal about maintenance) all
swear by the stuff. I can't imagine any automatic trans getting a harder
workout than a loaded bus-sized travel trailer or a maxed out combo
four-horse-sleeper trailer being hauled across the desert or over the the
mountains, or in stop and go traffic in hill country on a 110* day.
I use Mobil 1 ATF (and oil) in my '90 Suburban which hauls a portly 28 foot
steel dual axle horse trailer. We got a "whopping" 20% difference in fuel
mileage (9 mpg all the way to 11 mpg... ). But it definitely shifts smoother
and does a far better job transferring heat out of the trans and releasing it
at the cooler. I've only changed the filter and fluid once, after about 50k
miles, and there was far less pixie dust in the pan than there was at 30k when
I switched to Mobil.
The only application I know of where synthetic ATF has been problematic is
in T-5 gearboxes (possibly others) . I used a quart of B&M Trick Shift
(unaware that it was synthetic) in my drag car. After suffering missed
shifts, and realizing the problem, we tried a drain and refill but wound up
taking the trans apart, rinsing it out with solvent and switching to petrol
based before the problem completely went away. Synthetic must be very slippery
compared to conventional ATF.
My diff lube of choice is SWEPCO 201 synthetic racing diff lube - I won a 22
gallon drum of the stuff in 2001 at an NMRA event. It's pretty pricey - about
$28 a gallon then, and $40 now, but I've come to swear by it. I used it in
a screaming- loud Frankland quick change in a neighbor's hot rod that had worn
bearings and wobbly gear shafts, and it has remained eerily quiet. It also
silenced an early MGB banjo rear that had bearing rust-damage from having been
submerged in water without being properly drained and cleaned out. My
original plan was just to use it to get the car driveable, but after 5 years,
it's still quiet even at 70 mph.
Mark C
at the edge of the Great Dismal Swamp
---- Doug Odom <dlodom@charter.net> wrote:
> I like the way the inside of my TH-350 looks when I take it apart. I use the
> Mobil One Synthetic ATF. In fact I use Mobil One products in the motor,
> trans and rearend. Doug Odom in big ditch
>
>
> ----- Original Message -----
> From: "Dick J" <lsr_man@yahoo.com>
> To: "lsr list autox" <land-speed@autox.team.net>
> Sent: Sunday, April 20, 2008 1:39 PM
> Subject: [Land-speed] Which Automatic Transmission Fluid for Racing
>
>
> > I'm inclined to go with Mobil One Synthetic high performance automatic
> > transission fluid in the new TCI TH-350 in the racecar. Anybody got any
> > other thoughts about ATF?
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
>
> Land-speed mailing list
>
> You are subscribed as ifixmgs@cox.net
>
> http://autox.team.net/mailman/listinfo/land-speed
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Land-speed mailing list
http://autox.team.net/mailman/listinfo/land-speed
|