Just wondering, is there any identification of the differential ratio from the VIN plate / chassis number? Alternatively, is the ratio or an identifier marked on the diff casing itself? Our car is an automatic meaning the diff ratio is not recorded in the manual - I suspect it is the 3.77:1.
The Chassis Plate does not contain any information regarding the final drive ratio BUT, Jaguar did originally bolt a tag to the rear differential cover that documents the ring and pinion tooth count installed. Our '63 MK2 is equipped with a 3.8L engine and automatic transmission. The pinion count is 13, the ring gear count is 46. Dividing the ring gear tooth count by the pinion gear tooth count yields a final drive ratio of 3.54:1. Also worth noting, 3.8L equipped cars also came standard with a limited slip differential. Jaguar installed a second tag on the differential cover which contained “BP-L” when a Power-Lock differential was enclosed.
Before & after photos follow.
Excellent, thank you Brian - most helpful.
Just to confirm what Brian T has already explained
The 3,4 auto will have a standard 3.54 diff ratio
The 3.8 auto will have a standard 3.54 Powr Lok axle
The 3.4 manual overdrive will have a 3.77 ratio
The 3.8 manual overdrive will have a 3.77 Powr Lok
Hopefully, the diff tag is still on the diff cover bots
Superb, thanks Brian. Will investigate when next in those nether regions.
Another question about the VIN number.
I live in the Netherlands and have a from the USA an imported S type.
Can anyone tell me where to find the VIN numbers they are not at the crossbeam in front of the radiator as expected.
The only number I can find is the body number on a plate behind the rear bumper on the left side.
I hope that one of you can help me.
Did you check the VIN number using SALOON Data - The Cars - Jaguar, Daimler classic saloon (sedan) information, articles, photos and register
Could be that the cross member was replaced at some time.
A plate is not valid in the netherlands, it must be a stamped Vin Number.
If you search in the S-type forum THE INTERNATIONAL JAGUAR 'S'-TYPE REGISTER FORUM - FORUM INDEX
You will find that the Vin is only stamped in the Bulkhead, as I mentioned before.
Thanks voor your replay and I checked all your tips.
As you stated perhaps the crossmember has been replaced in the past.
This week I ordered a certificate at Jaguar Heritage and this morning already received the digatel version of the certificate which shows that my S type has matching numbers. So another proof for me and eventually for the RDW that the car is as delivered in 1965.