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XKE SERIES 1 REAR GEAR RATIOS


(From the Anything E-Type forum.)

2008-07-22 18:00:02  |  AK writes:

BUYING A
1965 SERIES 1 FHC
IT DOES 2900 RPM AT 80 MPH
I HAVE BEEN TOLD IT HAS THE 3.08:1 GEAR RATIO
WHAT CAN SOMEBODY TELL ME ABOUT THIS RATIO AND THE ADVANTAGES OR DISADVANTAGES???


2008-07-24 00:36:14  |  Mark writes:

According to my math, based on my car running 185-15 tires, the 3.07:1 final-drive ratio should have you running 80 MPH at 3200 RPM. With the 2.88:1 ratio you should see roughly 3000 RPM at this speed. I suspect your car has one of these two ratios installed, and that your tach may be off calibration. You don't mention where you are located, but the factory ratio for cars destined for North America was 3.54:1, which would put you around 3600 RPM at 80 MPH. 3.07:1 was standard for the British and European markets. Having said this, cars were often ordered with different ratios per customer request. I've heard that the 3.54 gears were to improve 0--60 times, but in my experience the engine has enough torque to deal with the taller gears without giving up much in acceleration. I lived with the 3.54 gears for sixteen years and they were definitely not good on long road trips. My vote goes for the 3.07s.


2008-07-24 08:59:04  |  AK writes:

thanks mark
i am located in US
the car is a two owner car and was always in the US
it was likely specially ordered with the 3.07:1 ratio- i will have to double check when the car arrives
the tach may be off or the newer wider track tires may effect the speedo so it may be closer to 3200 rpm at 80 mph

i wont drive this car on long trips or too much on the highway
i just hope i wont give up too much on the quick acceleration at lower speeds


2008-07-24 09:20:25  |  Mark writes:

The E-Type has so much bottom-end torque that you should still have seven-second 0--60 times. I've found that the 3.54 gears cause first gear to be used up so quickly that the acceleration gains are minimal. You'll find that your E-Type pulls really hard in second and third. You could always fit 3.31 gears as a compromise between the 3.54s and 3.07s.


2008-07-25 05:34:56  |  Bruno Stevens writes:

Hello, I have a 1963 E-Type (888981) that originally came with a 3,54 but I immediately decided to fit it with a 3,07. The car does exactly 120 Km/h (75Mph) at 2750 rpm, and 200 Km/h at 4600rpm. It is a very realistic ratio to make long journeys on motorways but it will allow you to have serious fun in second and third gear. So unless you want to regularly drive on a circuit, I really don't see the point of a 3,54. I have recently driven 2 E-types with 3,31, one of them (better tuned I suppose) was very slightly more nimble in 4th than mine but not faster. And the higher ratio of mine, means you can actually easily take it to well over 100Mph in third...
I hope this helps.
Have fun!
Bruno


2010-05-09 10:07:44  |  Anonymous writes:

my car is arriving soon and has the 3.07:1 final drive ratio- USA special order 1965 4.2 L FHC . does my car have a limited slip differential (?positrac). did all cars come with a LSD or open differential (one wheel drive)??


2010-05-12 14:03:32  |  Anonymous writes:

hey guys- so does the xke have positraction???


2010-05-13 11:33:44  |  Dan writes:

Yes, E-types have LSD.


2010-05-13 12:35:20  |  Anonymous writes:

thanks dan!

i found only a few internet articles about the xke and LSD and just wanted to make sure.
great news as i hate open differentials


2010-07-09 23:56:58  |  wm Kiolmer writes:

jmo (Just My Opinion) The e type is relatively light and has a lot of bottom end torque!!
The following shows the difference at 3200 RPM a comfortable shift point:
ratio 3.54 2.88
1st 25 31
2nd 40 48
3rd 54 66
4th 75 92
jmo !! 3.54 1st gear is miserable . You run out of gears in an instant.
4th is nothing but a buzz box
Am converting to either a 2.88 or 5 speed
Even with a 5 speed 1st is useless


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