[Rovernet] Differential gears

[Geff McCarthy]

Good luck to all of you P-6 thrust enhancers!  A few years ago, with just
ordinary factory spec power, one of my diff shafts simply broke in 2 pieces.
I could see the twist of 1-2mm, in the shaft at the end of the splines,
where it had deformed before failing.  The other shaft showed some
distortion, I think. I had never raced it or abused it in any way.   Perhaps
there is a metallurgical means of strengthening the shafts, if you are
adding lots of torque.

Geoffrey W. McCarthy MD MBA DipAvMed
677 NW Melinda Ave
Portland OR 97210
503-241-8468 (h)
503-799-3809 (m)

-----Original Message-----
From: Rovernet <rovernet-bounces at rovernet.org> On Behalf Of garrett bourque
via Rovernet
Sent: Saturday, June 15, 2019 18:14
To: Rovernet <rovernet at rovernet.org>
Cc: garrett bourque <gbbourque at gmail.com>
Subject: Re: [Rovernet] Differential gears

Aluminum heads are great.  I own a NADA 3500S that I installed a 4.0
Discovery engine in about 20 years ago.  It is still going strong.  This
winter, I installed a Ford 302 engine in a 1995 Volvo 960 station wagon.
This was Volvo's last rear wheel drive model.  I built an '89 Mustang 302
engine up to moderate power, with a carb and Edelbrock aluminum heads, a cam
and my parts car's 5 speed T5 trans.  I will take it for it's first drive in
a few days.  It should be fun!  A 302 might be fun in a Rover if weight was
not too overwhewlming for it!


On Sat, Jun 15, 2019 at 8:58 PM scott kohl via Rovernet <
rovernet at rovernet.org> wrote:

>  If you want the SBF to be as light as the Rover V8, you'll have to 
> fit ally heads.
>     On Saturday, June 15, 2019, 5:55:56 PM PDT, gjkzscruggs--- via 
> Rovernet <rovernet at rovernet.org> wrote:
>
>  It's a direct swap.  Years ago I went from the 3:48 to a 3:08 in my 
> '67 2000TC by replacing the entire diff.  Swap is an easy remove and
replace.
> Caution though as I understand the 2000 differential is not as 
> 'strong' as the 3500 diff... look at those extra fins.
>
> I used to correspond with a guy in New Zealand that swapped just the 
> gears from his 3:08 diff to the gears from a 3:48 which retained the 
> stiffness from the 3:08 diff case for use in his 4 spd 3500S.
>
> Never a fan of the BOP 3.5 V8... I'm still considering a swap to the 
> Ford 302.  Let's see... the Ford oils, it cools, it has power, it's 
> good enough for Cobras and Mustangs... hmmm.
>
> Gross Scruggs
>
> -----Original Message-----
> From: Rovernet <rovernet-bounces at rovernet.org> On Behalf Of Jonathan 
> Present via Rovernet
> Sent: Saturday, June 15, 2019 6:17 PM
> To: rovernet at rovernet.org
> Cc: Jonathan Present <present.jonathan at gmail.com>
> Subject: [Rovernet] Differential gears
>
> Going to install a set of 3.45 differential gears in place of my 
> current
> 3:08 set. Got to make it up those hills in San Francisco. Any advice 
> on installation is much appreciated!!!
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