Tags attached to cover

Number on Differential

Numbers on Ring
Been working on the restoration of my 1988 Jag XJS and am trying to identify what differential is in the car. The previous owner provided a receipt for a differential rebuild with new 3:54:1 ring and pinion. I am attaching photos of the differential housing, tags that were bolted to the differential cover and numbers found on the ring gear. How do I know what I have?

 

youngd,

I can't give you any info on the numbers stamped on the Dana ring. But the numbers in teh tags are as follows:

PL = Powerlok - therefore a Limited Slip Diff
CBC1792 is the Jaguar part number for the early HE-era diffs. The actual numbers are CBC179228 for the 2.88:1 fitted in the 5.3 model. And CBC179235 for 3.54:1 fitted to the 3.6 model
46 13 = the Diff ratio, being 46/13 = 3.54

Paul

 

Thanks Paul. Much appreciated!

 

You could confirm the crown and pinion correspond to the 46/13 by counting the gear teeth (13 on pinion, 46 on the crown wheel.. Alternatively, if the pinion gear isn't visible, count how many rotations of the input pinion are required to make one complete rotation of the output shafts.

HTH, Dave

 

Need a little more help here. I am trying to identify the correct output shaft seal for my differential. In the attached photo the green seal (next to the seal from my unit) is the one I received from SNG Barrett but as you can see it doesn’t match the one from my unit. I have attached a photos of my output shaft and bearing. I know the previous owner swapped differentials for a 3.54 but I don’t know what series it is. Hence I think I ordered the wrong parts. Can someone point me in the right direction?
Many thanks!

 

What part number did you order / did they supply for those seals? On the 3.54 diff fitted to facelift XJS, there's a changepoint when they moved to outboard brakes. I'm guessing you're still running inboard discs? I wonder if you've ordered / they've supplied the later seals?

Paul

 

Paul,
I have inboard brakes and I ordered part number JLM1264 for the differential output shaft seal and part number RTC1340 for the differential output shaft O ring. I should mention that the replacement O ring is not as thick and the one removed from my differential. Hope this helps.