Hi


Do you know if someone makes a better plate type lsd for the Jag diff than the original one. I am looking for the design whitch uses the "cross bolt" withc actuates a angle ramp to press on the discs. The oem type just uses the gears to press the disc pack I think.


Ole Mobeck

 

I think you might be looking for what you already have. The powr lok uses the ramps, part of the gear transmits the force to the plates but it is generated by the cross shaft on the ramp.

 

Yes you are right, I see it now when I look again at the drawings. But I would really like to find one that dont push with the gears.


If the cross shaft pushed on the boss between the gears and discpack, and the ramps was on that boss I would be wery happy.


Is that available from someone? This is how ZF,Cusco, xtrac and many other aftermarket motorsport lsd work


Ole Mobeck

 

the best ever designed

Detroit Truetrac

Detroit Truetrac

buy one to fit your dana

 

Found one!!
Jaguar Gripper Diffs




The Quaife and TrueTrac is fine for Street and clubsport, Perfect actually. But for 100% motorsport I prefer a plate type diff With ramps and preload.




Ole Mobeck

 

Jonathan,
My car has a Dana diff, is the Truetrac a direct bolt-in replacement, or are they other things that have to be fixed?

Greg

 

Its Direct fit, just like the same desige Quaife diff


Ole M

 

For drag racing plates lockers and solids are fine. for road racing in traffic I prefer the smooth torque transition of the Gleason torsen it is more predictable and consistent, but the Detroit True Track is about 1400 us ...
and is mild and would be good for my wife to drive with..

I have not had my wife drive the XJS yet but I have had a little fun with it powering out of curves.... I am hoping she will not be as inclined to press the power on as much as me... I do not want her to be surprised like with the Volvo wagon that time coming off the interstate and doing a nice spin down into the grass of the off ramp loop... I was in the back with the baby in the car seat and tried to talk her through counter steering, excreta then I just told her hands up let her go everything will be just fine.. that Volvo was a little @$$ happy. I solo II'ed it once or twice and one of the road racers came up to me in the pits and said "you were getting a little WIDE there in the slalom" I replied " Yes, but I kept the Front Front and the Back Back ... " then they realized "Yeah..." years ago a 240 DL

 

upgraded my 1978 JAg XJS Dana 44 diff with 1959-62 Corvette(not 57-58) LSD discs, they actually fit my Dana diff case, difference was thinner plates than Jag, so more plates(more surface area), but one plate was a Bellville spring type! very special LSD lube oil.

also changed to 3.73:1 gear ratio.

of course GM dont know much about things anyway((or maybe they do). seems its Called Dana/Eaton corp.

came out with the 1957 corvette with an LSD, was a very good upgrade!

how do i know, bought new in 57 a Corvette fuel injection,4 speed ,with LSD, HD ceramic brakes,didnt stop for sh%t when cold , but oboy when you got them up to temperature!!

you know thinking back(whew) that car could peg the 145mph speedo, many times.

 

Any Dana 44 diff will fit with the following restrictions:

- must be 19 spline - these are getting rare - one of the remaining available diffs is the Auburn cone type diff

- the Jaguar crown gear has 7/16" bolts and the Dana 44 diff will have 3/8" holes.
- the fix is to drill out the 3/8" holes to 29/64"

Summit Racing is currently selling the Auburn for $315, free shipping and $75 coupon on future orders.

Free shipping probably does not include France

 

Total bargain, and cheaper than a rebuild by miles! they will not ship internationally, but I am sure someone in the US will help. Many thanks Plums. A question, is it this one:
http://www.summitracing.com/int/parts/aub-5420112 ("designed for 3.73 gear ratios and down")

or this one:
http://www.summitracing.com/int/parts/aub-5420111 ("designed for 3.92 ratio and up")?

My car had 2.88 ratio, but I never know what up and down actually means when talking about diffs, are the advertisers talking numerically high/low or actual high/low?

Lastly is 10 bolt pattern correct (I do understand about the bolt hole widening).

Greg

 

Where does one get the ring and pinion gears....


there is a 90 xj6 at the dismantlers here they will pull the whole rear for me for a price...

 

http://www.summitracing.com/int/parts/aub-5420112 ("designed for 3.73 gear ratios and down")

is the one you normally want.

It also happens to be their heavier duty unit with a higher preload. That is normally
more expensive. But, I guess with 19 spline units being lower demand, they build
just that one and don't charge the premium.

You have to be very careful with the 2.88

My understanding is that Jaguar used 3 different carriers and the 2.88
is unique unto itself. It may require a spacer.

Check out posts by IcsAmerica:

https://www.jaguarforums.com/forum/x...upgrade-87356/

https://www.jaguarforums.com/forum/x...estion-123617/

https://www.jaguarforums.com/forum/x...f-head-123057/

https://www.jaguarforums.com/forum/x...rential-94945/

In that last one, he basically says that the one I pointed at will be fine with the 2.88, but you may
want to check with him directly.

I think you will need the generic DANA 44 bearings, so order them at the same time.

And on top of that, Don B has a photo album detailing his rebuild over at jag-lovers.

Ten bolts must be correct since IcsAmerica has already done it.

JEPC also calls for quanity 10.

There are other vendors, including ebay vendors that do ship internationally.
Just search Auburn + part number. Pages of them. Depending on shipping,
a higher purchase price might still work out cheaper if they have bulk
shipping discounts on their shipping account.

Or find the European distributor. You could contact Auburn, or they might
have a distributor listing on their site.


++

 

Summit will ship internationally, i've bought a bit of stuff from them and they organised shipping to Australia.

 

The following page annotated in red is an extract from the 2013 catalog.

There are 4 possible fitments as well as a set of setup bearings.

The HP is the street version whereas the PRO carries a much heavier
preload.

The second illustration shows the deck height of the short and tall carriers
as used in DANA 44 applications. The safest way to order the right part
is to meaure your existing application before ordering.

illustration credit:

Differential Carrier Breaks | West Coast Differentials

++

 

the ultimate replacement (this particular unit was spec'd with an Auburn):

 

Is that being held by the Stigs mechanic??

 

Stig??

Anyways it's a Kirkham .. apparently used for Cobra replicas.

 

The Stig
Top Gear tame racing driver





• Some say he never blinks, and that he roams around the woods at night foraging for wolves...
• Some say he’s wanted by the CIA, and that he sleeps upside down like a bat...
• Some say he appears on high value stamps in Sweden, and that he can catch fish with his tongue...
• Some say he is illegal in 17 US states, and he blinks horizontally...
• Some say that his breath smells of magnesium, and that he’s scared of bells...
• Some say he naturally faces magnetic north, and that all his legs are hydraulic...
• Some say that he lives in a tree, and that his sweat can be used to clean precious metals...
• Some say that his heart ticks like a watch, and that he’s confused by stairs...
• Some say that his voice can only be heard by cats, and that he has two sets of knees...
• Some say that he’s terrified of ducks, and that there’s an airport in Russia named after him...

 

Oh, you mean my evil twin!