MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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castlesid
Kevin Jackson
Sidcup UK
(361 posts)

Registered:
11/18/2007 10:38AM

Main British Car:
1975 MGB GT Rover V8 4.35L

Identifying a diff unit.
Posted by: castlesid
Date: October 29, 2009 02:53PM

Jim you may know what this is with all your work on the jag rear end.

More specifically tring to identify the actuall limited slip unit, not sure the final drive unit is jag or something else but the lsd looks like a Dana or Jag type unit or possibly GKN.

Anyone else please feel free to chime in.

Kevin.
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BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Identifying a diff unit.
Posted by: BlownMGB-V8
Date: October 29, 2009 03:41PM

That's a Power-Lok posi. Good units. All steel clutches, should have about 60 ft/lbs of static break away force. Jag Salisbury housing. Gears look to be in the low 3 series somewhere.

Jim


castlesid
Kevin Jackson
Sidcup UK
(361 posts)

Registered:
11/18/2007 10:38AM

Main British Car:
1975 MGB GT Rover V8 4.35L

Re: Identifying a diff unit.
Posted by: castlesid
Date: October 29, 2009 04:33PM

Thanks Jim,

Thought you'd know the answer, wasn't sure it was a jag as I couldn't see any mounts for the inboard disc brakes unless it's a later outboard model.

Kevin
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BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Identifying a diff unit.
Posted by: BlownMGB-V8
Date: October 29, 2009 05:19PM

Looks like it might be the '64-'67 XKE unit. It would use a pair of "horseshoe shaped caliper mounting brackets". Earlier units had 7 holes and later had holes in the bearing cap for caliper mounting.

Jim


castlesid
Kevin Jackson
Sidcup UK
(361 posts)

Registered:
11/18/2007 10:38AM

Main British Car:
1975 MGB GT Rover V8 4.35L

Re: Identifying a diff unit.
Posted by: castlesid
Date: October 31, 2009 06:49AM

Jim,

Thanks for the additional info, the guy who bought it was mislead as he was told it came out of a TR7! which obviously it didn't unless some one had installed a jag rear end.

He has stripped it and not unexpectedly the clutch discs are shot but they should be readily available, main issue will be whether the posi unit will mate with the SD1 axle he want's to put it in, we will see.

Kevin


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Identifying a diff unit.
Posted by: BlownMGB-V8
Date: October 31, 2009 05:22PM

It's essentially a Dana 44 unit so if the SD1 runs a D44 or comparable Salisbury he's in good shape. How bad are the clutches, just worn thin, or evidence of abuse? I had a Power-Lok that had been beaten pretty hard, one of the clutch plates was actually broken. It turned out to have egg shaped side bearing journals which became obvious when I went to put the new bearings on. Apparently the heat warped it. Just something to look for.

He can possibly get some coin for that housing.

Jim


castlesid
Kevin Jackson
Sidcup UK
(361 posts)

Registered:
11/18/2007 10:38AM

Main British Car:
1975 MGB GT Rover V8 4.35L

Re: Identifying a diff unit.
Posted by: castlesid
Date: October 31, 2009 08:05PM

Jim,

He's done a trial fit and it all seems to match up which is useful knowledge. I had the same thought that the E type housing may be worth something.

Thanks again,

Kevin..



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