Thunderbird , gen 2 (03-06) lincoln diff

Just check ratios as xkr is 3.31

 

Ditto. I'm pretty cure the rear cover is different, plain steel on the LS, louvered aluminum on the XKR but otherwise the internals are very similar. I want to find a 1st gen LS with the true 8.8 housing to go posi with versus the hybrid 8.8 with an 8" ring gear and only one main bearing cap like we ended up with.

 

Lincoln gen 2 (3.58)

 

Following this thought with interest but can you elaborate Ranchero? Is it your intent/ goal to incorporate the Gen I LS diff (housing included) into the XKR or are you thinking of replacing the innards only?

I ask because
I don't know much about the differential(s) no matter the make/ model
I've read a few threads where guys have attempted, at least in theory and seem to go back to the Quaife LSD.
I'd like the LSD on my base XK but Quaife isn't worth the spend (for me). If I had an XKR, I might think differently.

Thanks for the reply.

 

Confirmation the gen 2 (3.58) lincoln diff will work in xk/r 4.2 with 3.31.

Shifting fine no limp mode however yet to do a full power run due to a broken l/h engine mount .

The rear cover on the Lincoln diff is slightly deeper resulting in a larger capacity to hold oil.

 

Does that swap result in the speedometer/odometer reading low by 7%?

 

The 1st gen housings will fit a complete '90's 8.8 traction lok out of a stang or ranger. The 2nd gen hermaphrodites only have one carrier bearing cap and the traction lok hits the housing. My concern is if memory serves, the early cars used two different length axles so the driveshaft stayed in the center of the car. I know where a couple 1st gens are in a local yard but haven't had enough motivation to deal with them. These cars are hard to find at scrap prices.

I'm pretty sure the speedo is fed through the wheel sensors. That number being different from the trans speed sensor is what trips when the ratio change is too far out.

 

Just checked it in Steve's XK against a stand-alone GPS, the speedometer is about as bang-on as they all are. So the speedometer is getting the actual speed from the wheel speed sensors.

 

Researching diff-related stuff just now as I think I may have a problem with the standard one on my 2008 XKR. Came across this on a thread on the UK forum, Eaton Detroit TrueTrac LSD, this one is a 28-spline version for the Ford 8" axle. I'm not sure if that alone means it's a like-for-like alternative to the Quaife ATB but if so then it's approximately half the price.

https://www.summitracing.com/int/par...a616/overview/

If it does transpire that my current diff is boned then I'm tempted to buy a cheap standard one from eBay for the housing, buy one of those Eaton units and the bearings and whatnot to go with it and build it up and have it swapped on to my car.

Anyone actually used one of these things?

 

That's the wrong one. It's for a '60's 8" removable pumpkin carrier (Falcon, Mustang, Fairlane). Smaller version of a 9" carrier. Our diffs are a hybrid 8" ring and pinion setup that uses a 8.8" Ford pumpkin

https://www.summitracing.com/parts/dtl-913a561

The 8.8" version looks like this and I'm pretty sure it won't fit in our housing.


In other news I found a 1st gen LS that a local guy is parting out. I'm going to try and get the whole rear if the price is reasonable.

 

Thread in here seems to suggest that some 8.8" diffs will go in a standard casing, unless I've read it wrong? Jump to the last couple of pages or so, it's a 20-page thread:

https://www.jaguarforums.com/forum/s...troit+truetrac

 

I'd need to do some photo interpretation of the above photo to compare the dimensions but I'm going with no fit. I have a couple 8" pumpkins floating around and at least one complete 8.8" rear from a turbo coupe that I could play with if I get a spare 2nd gen housing. From the thread on here and LVC, the conventional 8.8 T-lok carrier does not fit in the 2nd gen housing. That 8" one looks like it might but there's a ton of other dimensions that need checked / verified first. Maybe something for a warmer weekend.

 

That's for an old 8", like back in the 60's, totally different to the 8" in the Jags and Lincoln.

 

Do what old-timers like myself used to do... find a Diff with the gears you want and MAKE it fit.

 

So the axle shafts just slide into the carrier? No C clips like the 8.8" Fords to retain the axle shafts? That's why the 8.8 carrier is so large, axles slide into the middle, C clips get slid over the ends and then a pin pushed through to keep the axles from shifting in to where the C clips will fall off allowing the axle to slid out of the housing.

 

There are circlips in the ends of the splined axle shafts;





They are meant to be discarded and replaced with new ones each time the axle is taken out of the diff centre. No-one does this LOL.

 

So that tanks the idea of retrofitting a 8" locker in place of the 8.8" open carrier. PITA. Maybe find some flavor of C clip eliminators and modify the housing for a retainer flange?

 

Steve did you do this work yourself? Might you have a step by step with pics like the Quaife install?

Like this:
https://www.jaguarforums.com/forum/x...lation-155867/

and or possibly a parts list like this:

https://www.jaguarforums.com/forum/x...ghlight=Quaife

I doubt I'll take it on but I know it's been a hot topic and it's nice to know there's an alternative to Quaife as the price seems to just keep rising.

 

Yes Sean I did the work myself

I did my diff swap at the workshop and Cambo's diff swap in his garage

So yes it can be done with basic hand tools, stands and a Jack (without the luxury of the lift) although this way was a little more difficult especially on the body.

I can write a step by step if you like