Re: Sure Grip for sale

[Bill <Y1TopBanana73@xxxxxxxxx>]

THEORETICALLY that's true, but I have a friend of mine with a 69 Dart,
383, 727, 4.10's, street slicks, running 11.85's using a 741 case
without any issues. The car is on the street and he uses the gas pedal
like an on-off switch.

He has has a 69 Satellite, healthy 440, 4spd he drives the same way
with a 741 case in it...no problems there either.

I would get a larger pinion case if you can find one easily, but don't
think your 741 is going to grenade the first time you hit the gas.

Bill M


On Fri, Oct 24, 2008 at 8:20 PM, Wakeman Massie <wakey@xxxxxxxxxxx> wrote:
>
> Jimmie, if the '65 Belevdere rearend you plan to upgrade is from the
> so-to-be-440 powered wagon you list in your sig, a 741 case is not a good
> choice to invest in.  The pinion stem was not designed to support the torque
> even a mild 440 will produce, especially in a 3900lb vehicle.
>
> Furthermore, unless you have some good used gears or NOS gearsets, 741 ring
> and pinions are unavilable and have zero aftermarket support.  There is a
> reason for this.
>
> The Chrysler 8 3/4 guide penned by a person nicknamed Vaanth is essential
> reading - Google it.  It explains clearly the different cases and their
> strengths and weaknesses.  If you want to go for a sure-grip - which is a
> great idea - I'd look for a 742 (my choice) or a later 489 case (biggest
> pinion stem).  Either of these will be more than adequate unless your 440 is
> a really wild one.
>
> Best Regards
>
> Wakeman


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