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Didn't the axle spline count change at some point? So you can do the conver=
sion but there are a few extra tweaks necessary, possibly up to and includi=
ng the installation of new axles.=20
IIRC most of the period posi conversions were done using a Jaguar different=
ial assembly. Then there is something that sticks in my mind where the orig=
inal ring gear bolts are smaller than what is being used now. So if you're =
using a modern posi unit then you have to use stepped ring gear bolts.=20
My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about 3000 R=
PM at 60 MPH, in fourth. The five speed makes it livable but first gear is =
really short. Still need to change it over to the Z ratios.=20
-Theo=20
From: "tigers" <tigers@autox.team.net>=20
To: "Joel Martin" <jmartiniii@yahoo.com>, "tigers" <tigers@autox.team.net>=
=20
Sent: Saturday, November 16, 2019 9:16:34 AM=20
Subject: Re: [Tigers] Tiger Differential=20
Stock rear end is NOT posi. It is now called Dana44, same diff as a lot of =
4x4 front as well as others.=20
A normal rear end shop can put posi in if someone didn't do yours before.=
=20
Axles, bearings, hubs are unique Tiger.=20
Stock is about 2450RPM at 60, way too fast unless you have a big cam IMHO.=
=20
Big carb, hopped up 289, you probably get 14mpg highway? Ouch.=20
I have a stock 5.0L/T-5 wide ratio.. maybe 220HP, 14in wheels =3D1950RPM at=
70.. NICE. Like a modern car=20
MPG > 20 but not sure..=20
Good luck,=20
Gary=20
On 11/16/2019 8:02 AM, Joel Martin via Tigers wrote:=20
The manual shows that Tiger rear ends are: Salisbury hypoid =E2=80=984.HA=
=E2=80=99 with a 2.88 to 1 ratio. What does the 4.HA stand for?=20
My understanding is these are posi traction meaning both wheels are applyin=
g power.=20
Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader tran=
smissions, what is your RPM=E2=80=99s in fourth at 50, 60,70 & 80 MPH?=20
Those of you running other rear end rations, other factors the same, what a=
re your RPM=E2=80=99s at the same speed and what ratio?=20
I like to drive my cars and just got back from a 1,263 mile 6 day trip in m=
y original owner 1973 MGB with 229,000 miles on the car.=20
Things to consider: 1966 MK1A with 289 HiPo motor with about 300 HP and est=
imated 9.4.1 compression=20
600 cfm 4 barrel Holley carburetor=20
Headers with 2.25=E2=80=9D exhaust=20
15=E2=80=9D wheels running 205\50 x 15 tires=20
Wide ratio top loader 4 speed transmission=20
Believe Salisbury posi rear end=20
Closed, open, locked, posi, ratios =E2=80=93 the list is endless. What I am=
looking for is a very streetable around town and on the highway posi rear =
end ratio that will work well with a good balance between acceleration for =
fun and highway cruising. I am not there yet. I have the acceleration for f=
un part in place but not the highway cruising (of course - avoid highways\i=
nterstate).=20
Data means a lot regarding RPM=E2=80=99s at speeds between 50 to 80 mph. Th=
ose of you who have switched ratios, please share your pros and cons.=20
Thank you for your input.=20
Regards=20
Joel Martin=20
_______________________________________________ [ mailto:tigers@autox.team.=
net | tigers@autox.team.net ] Donate: [ http://www.team.net/donate.html | h=
ttp://www.team.net/donate.html ] Archive: [ http://www.team.net/pipermail/t=
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<html><body><div style=3D"font-family: arial, helvetica, sans-serif; font-s=
ize: 10pt; color: #000000"><div>Didn't the axle spline count change at some=
point? So you can do the conversion but there are a few extra tweaks neces=
sary, possibly up to and including the installation of new axles.</div><div=
><br data-mce-bogus=3D"1"></div><div>IIRC most of the period posi conversio=
ns were done using a Jaguar differential assembly. Then there is something =
that sticks in my mind where the original ring gear bolts are smaller than =
what is being used now. So if you're using a modern posi unit then you have=
to use stepped ring gear bolts.</div><div><br data-mce-bogus=3D"1"></div><=
div>My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about 30=
00 RPM at 60 MPH, in fourth. The five speed makes it livable but first gear=
is really short. Still need to change it over to the Z ratios.</div><div><=
br data-mce-bogus=3D"1"></div><div>-Theo</div><div><br data-mce-bogus=3D"1"=
></div><div><br data-mce-bogus=3D"1"></div><div><br data-mce-bogus=3D"1"></=
div><div><br></div><hr id=3D"zwchr" data-marker=3D"__DIVIDER__"><div data-m=
arker=3D"__HEADERS__"><b>From: </b>"tigers" <tigers@autox.team.net><b=
r><b>To: </b>"Joel Martin" <jmartiniii@yahoo.com>, "tigers" <tiger=
s@autox.team.net><br><b>Sent: </b>Saturday, November 16, 2019 9:16:34 AM=
<br><b>Subject: </b>Re: [Tigers] Tiger Differential<br></div><div><br></div=
><div data-marker=3D"__QUOTED_TEXT__">Stock rear end is NOT posi. It =
is now called Dana44, same diff as a
lot of 4x4 front as well as others.<br>
A normal rear end shop can put posi in if someone didn't do yours
before.<br>
Axles, bearings, hubs are unique Tiger.<br>
Stock is about 2450RPM at 60, way too fast unless you have a big cam
IMHO.<br>
Big carb, hopped up 289, you probably get 14mpg highway? Ouch.<br=
>
I have a stock 5.0L/T-5 wide ratio.. maybe 220HP, 14in wheels
=3D1950RPM at 70.. NICE. Like a modern car<br>
MPG > 20 but not sure..<br>
Good luck,<br>
Gary<br>
<br>
<br>
<div class=3D"moz-cite-prefix">On 11/16/2019 8:02 AM, Joel Martin via
Tigers wrote:<br>
</div>
<blockquote cite=3D"mid:381467494.773614.1573920156530@mail.yahoo.com">
=20
<div class=3D"yahoo-style-wrap" style=3D"font-family:garamond, new
york, times, serif;font-size:16px;">
<div>
<div>
<p class=3D"ydpe3a33268MsoNormal">The manual shows that Tiger
rear ends are:<span> </span>Salisbury hypoid =E2=80=984=
.HA=E2=80=99 with
a 2.88 to 1
ratio.<span> </span>What does the 4.HA stand for?</p>
<p class=3D"ydpe3a33268MsoNormal">My understanding is these
are posi traction meaning both
wheels are applying power.</p>
<p class=3D"ydpe3a33268MsoNormal">Those of you with 2.88 rear
ratio gears, wide ratio 4 speed
top loader transmissions, what is your RPM=E2=80=99s in fourt=
h at
50, 60,70 & 80
MPH?
</p>
<p class=3D"ydpe3a33268MsoNormal">Those of you running other
rear end rations, other factors
the same, what are your RPM=E2=80=99s at the same speed and w=
hat
ratio?</p>
<p class=3D"ydpe3a33268MsoNormal">I like to drive my cars and
just got back from a 1,263 mile
6 day trip in my original owner 1973 MGB with 229,000
miles on the car.
</p>
<p class=3D"ydpe3a33268MsoNormal">Things to consider:<span>&nbs=
p;
</span>1966 MK1A with 289 HiPo motor with about 300 HP and
estimated 9.4.1 compression</p>
<p class=3D"ydpe3a33268MsoNormal">600 cfm 4 barrel Holley
carburetor</p>
<p class=3D"ydpe3a33268MsoNormal">Headers with 2.25=E2=80=9D ex=
haust</p>
<p class=3D"ydpe3a33268MsoNormal">15=E2=80=9D wheels running 20=
5\50 x
15 tires</p>
<p class=3D"ydpe3a33268MsoNormal">Wide ratio top loader 4
speed transmission</p>
<p class=3D"ydpe3a33268MsoNormal">Believe Salisbury posi rear
end </p>
<p class=3D"ydpe3a33268MsoNormal">Closed, open, locked, posi,
ratios =E2=80=93 the list is
endless.<span> </span>What I am looking for is a
very streetable around town and on the highway posi rear
end ratio that will
work well with a good balance between acceleration for fun
and highway
cruising.<span> </span>I am not there yet. I have=
the
acceleration for fun part in place but not the highway
cruising (of course - avoid highways\interstate).<br>
</p>
<p class=3D"ydpe3a33268MsoNormal">Data means a lot regarding
RPM=E2=80=99s at speeds between 50 to 80
mph.<span> </span>Those of you who have switched
ratios, please share your pros and cons.</p>
<p class=3D"ydpe3a33268MsoNormal">Thank you for your input.</p>
<p class=3D"ydpe3a33268MsoNormal">Regards</p>
<p class=3D"ydpe3a33268MsoNormal">Joel Martin</p>
</div>
<br>
</div>
</div>
<br>
<fieldset class=3D"mimeAttachmentHeader"></fieldset>
<pre class=3D"moz-quote-pre">________________________________________=
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</pre>
</blockquote>
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