The 'E' Type Forum

Hi

Can anyone confirm which diff ratio our S1 car will have on chassis No, 1E10012.

I understood that all US S1 4.2's had 3.54 diffs but two catalogues I have seen suggest that some cars had 3.07 diffs. How can I tell which one it has without taking it apart. Ian

There should be a Metal plate on the Upper right Edge, Attached to a Bolt, saying 46/13 or similar. Solving this gives the Ratio inside, Provided no one has altered it and left the plate !

Carsten

So am I right in assuming a 3.07 diff would be 46/15 then ? Maths has always been my strong point,...ahem

43/14 from memory.

What numbers did you find ? Tell us so we can do the Maths for you :-)

Carsten

I looked last night, 46/13 on the bottom of the diff, so it is a 3.54 after all so the parts catalogue I saw was wrong. I am seriously thinking of changing the crown wheel so I have a 3.07 diff for economy etc, can anyone recommend the best source for one as I have heard that some repros whine and are of poorer quality.

I used Dana Techologies (OEM) for the LSD.
When I worked out the cost of new bearings, seals, crown wheel and pinion (I was changing from US to UK spec), I figured the all in price which Dana quoted was a good deal.

This is the best of both worlds. Very good acceleration and low revs on the motorways. I have it in several Jaguars, incl E-types, XKs and the 50s and 60s saloons.

Where would I find info on these dana diffs, cant seem to find it online?

Dana are in the USA. They do not manufacture differentials or complete final drives, but manufacture the gearsets which are used in them

Alty Ian wrote:Where would I find info on these dana diffs, cant seem to find it online?

As already mentioned, Dana is a U.S. company. The 3.07 gearset was fairly common on early 80's four wheel drive International Scouts and Jeep Grand Cherokees, if either of those was imported to the UK. The front axle is the one to get as it typically has almost no wear. I purchase mine (from a Scout) for $15. The axle shop said it was like new. There are two issues with a U.S. spec gearset, however....one is that the mounting holes in the ring gear are larger diameter than for the original Jaguar application. I used small sleeves to take up the difference. Might be possible to find or make shoulder bolts. Some say don't bother as the clamping force is enough to keep the pinion gear in position even under high torque application. The second issue is the spline on the pinion is different. A company in Canada called IWE at www.rearendsonly.com sell the proper flange style coupling to fit the original Jaguar prop shaft. I believe Dick Maury at Coventry West in the U.S. also sells them. Also a standard U.S. spec bearing and seal kit has most of the correct part numbers, but a few are unique to the Salisbury pumpkin.