I'm currently getting parts together to make a bellhousing for my k series to type 9, I'm just wondering if all type 9 uses the same 23 spline shaft for the clutch

All the original Ford boxes do. The recent Caterham boxes supplied for use on Sigma cars (and possibly Duratec) don't but it doubtful you will see one of these.

Long nose for the V6 engines and shorter nose for inline 4's IIRC

Regards
Rob

not quite that simple unfortunately Rob

The Scimitar SS1 uses the type 9 on the CVH and later, on the K series (all with open Ford IRS diff, push in shafts and rear (non-Ford) drum brakes). This is what I've compiled so far (and is in no way complete)

Input shafts:

There are “long” and “short” input shafts and input shaft covers.

The “short” (6.9”) input shaft for the 4 cylinder engines has 18 teeth with a short cover.

The “long” (8.1”) input shaft for the V6 engines with a long input cover has 18 teeth for the 2.3 or 19 for the 2.8/2.9.

The diesel gearbox has a “long” (8.1”) shaft with 18 teeth (as the 2.3 V6) but a “short” cover.

There is also a special “transit” length shaft used by Caterham with the K series - Reliant appear to use a 2.8 box with a Caterham bellhousing but modify the K series crank in the Sabre mk2?

Ratios:

1.6, 1.8, 2.0, 2.3 V6
1st 3.65
2nd 1.97
3rd 1.37
4th 1
5th 0.82

2.8/2.9 inc 4x4
1st 3.36
2nd 1.81
3rd 1.26
4th 1
5th 0.83

diesel
1st 3.91
2nd 2.29
3rd 1.38
4th 1
5th 0.82

Front layshaft bearings can be "early" or "modified" - visible as a half-moon cover secured by 3 bolts just below the input shaft.

Early and late tail shafts (which must have the matching selector shaft fitted)

Mechanical or electric speedo



[Edited on 15/3/14 by scimjim]

For your question....

quote:

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I'm currently getting parts together to make a bellhousing for my k series to type 9, I'm just wondering if all type 9 uses the same 23 spline shaft for the clutch

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quote:

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Originally posted by scimjim
not quite that simple unfortunately Rob

The Scimitar SS1 uses the type 9 on the CVH and later, on the K series (all with open Ford IRS diff, push in shafts and rear (non-Ford) drum brakes). This is what I've compiled so far (and is in no way complete)

Input shafts:

There are “long” and “short” input shafts and input shaft covers.

The “short” (6.9”) input shaft for the 4 cylinder engines has 18 teeth with a short cover.

The “long” (8.1”) input shaft for the V6 engines with a long input cover has 18 teeth for the 2.3 or 19 for the 2.8/2.9.

The diesel gearbox has a “long” (8.1”) shaft with 18 teeth (as the 2.3 V6) but a “short” cover.

There is also a special “transit” length shaft used by Caterham with the K series - Reliant appear to use a 2.8 box with a Caterham bellhousing but modify the K series crank in the Sabre mk2?

Ratios:

1.6, 1.8, 2.0, 2.3 V6
1st 3.65
2nd 1.97
3rd 1.37
4th 1
5th 0.82

2.8/2.9 inc 4x4
1st 3.36
2nd 1.81
3rd 1.26
4th 1
5th 0.83

diesel
1st 3.91
2nd 2.29
3rd 1.38
4th 1
5th 0.82

Front layshaft bearings can be "early" or "modified" - visible as a half-moon cover secured by 3 bolts just below the input shaft.

Early and late tail shafts (which must have the matching selector shaft fitted)

Mechanical or electric speedo



[Edited on 15/3/14 by scimjim]

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Sorry to dig up an old thread but does anyone know what ratios the Caterham Sigma gearbox has? From what I can gather it is a v6 box (3.36 first etc.) with 19 spline input shaft (to fit the stock clutch plate but still long version) that may have a 0.75 5th. Can anyone confirm ?

Thanks

Caterham use the V6 ratios in some cars but not all these days.

If they are V6 ratios they will be:

1st 3.36
2nd 1.81
3rd 1.26
4th 1
5th 0.825

To provide a 0.75 5th would make the box very expensive since a new 5th gear pair would be needed. Add to that the gap between 4th and 5th would be much bigger than normal and combined with a smaller engine would make it not a great experience. When we change ratios we always close them up.

But from conversations I had with a new Caterham sigma owner a couple of years ago the basic Sigma cars were being fitted with 4 cylinder ratios and the only change was the input shaft to a long one with splines to match the clutch. He was quite disappointed after his K Series car with V6 ratios which although not perfect were better.

[Edited on 14/10/15 by Paul Turner]

Paul

Many thanks, I was looking at one on ebay at the moment and have had it confirmed that it is a stock 2.0l type just with the input shaft changed (looks like a long shaft though). I already have a stock 2.0l box and have used a pinto clutch so will be giving this one a miss, if it was a v6 wit the sigma shaft I may have been interested. Bearingkits do a .75 sigma v6 gear kit advertised for Caterhams - wondered if this was a standard fitment - http://www.bearingkits.co.uk/details.asp?ID=680


[Edited on 14/10/15 by Ugg10]

quote:

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Originally posted by Ugg10
Bearingkits do a .75 sigma v6 gear kit advertised for Caterhams - wondered if this was a standard fitment -

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