Which overdrive gearbox?
Posted By : Nigel Gibbins, 09-Aug-2003, 09:49am
Hi Viv,
I believe the '71 spitf was fitted with the Laycock D type overdrive mounted on the back of a three-rail gear box with synchromesh on all forward gears (Ooo - I sound like a manual
).
The 1500 had the single rail gearbox with J type overdrive, but the problem is more with the input shaft as on the 1500 it has 20 splines and the 1300 clutch plate requires 10. You need a conversion clutch plate (Part No GCP244) which is fits the 1300 flywheel and the single rail input shaft.
But I would suggest you actually go for the 1500 engine, three-rail box and D type overdrive combination, but you will need the conversion clutch plate which is Part No GCP103. As I don't think the D type will mount onto the three-rail box - I must stress I'm not an authority on the overdrive thing though so I cold be wrong there, but if you've already go the box/od sorted you may as well stick with it.
The 1500 is a much better engine than the MKIV 1300 anyway (same engine - longer stroke - more torque) and the overdrive combination will make the car cruise like a dream.
Cheers
NiG
http://www.niginthecar.net
I believe the '71 spitf was fitted with the Laycock D type overdrive mounted on the back of a three-rail gear box with synchromesh on all forward gears (Ooo - I sound like a manual
).The 1500 had the single rail gearbox with J type overdrive, but the problem is more with the input shaft as on the 1500 it has 20 splines and the 1300 clutch plate requires 10. You need a conversion clutch plate (Part No GCP244) which is fits the 1300 flywheel and the single rail input shaft.
But I would suggest you actually go for the 1500 engine, three-rail box and D type overdrive combination, but you will need the conversion clutch plate which is Part No GCP103. As I don't think the D type will mount onto the three-rail box - I must stress I'm not an authority on the overdrive thing though so I cold be wrong there, but if you've already go the box/od sorted you may as well stick with it.
The 1500 is a much better engine than the MKIV 1300 anyway (same engine - longer stroke - more torque) and the overdrive combination will make the car cruise like a dream.
Cheers
NiG
http://www.niginthecar.net
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Which overdrive gearbox?
Posted By : Michael Bird, 11-Aug-2003, 01:07pm
Nig,
I know the j type od uses a shorter prop shaft than non-od, but is the d-type one different again? Also, if fitting the 1500 engine, do you think it would make sense to fit the 1500 diff. as well?
For the record, I had a j-type od and 1500 g/box fitted to my old 1300 (also using a 1500 flywheel and bits n' pieces from Kipping) and it all worked very nicely!
1500 better than 1300? ouch that hurts!
Michael.-
Which overdrive gearbox?
Posted By : Michael Davis, 11-Aug-2003, 02:09pm
As I remember it, there are three lengths of propshaft altogether:
a) 3-rail box without overdrive
b) 3-rail box with D-type overdrive
c) single rail box without overdrive
d) single rail box with J-type overdrive
I know that's four :-) but b) and c) are the same, I just listed them that way for clarity (maybe it didn't work)
I could be wrong. Please correct me if I am.
Mik-
Which overdrive gearbox?
Posted By : Craig Gingell, 11-Aug-2003, 03:33pm
There's some propshaft length information on the Canley Classics website at -
http://www.canleyclassics.com/infodatabase.asp?top...
Rgds
Craig-
Which overdrive gearbox?
Posted By : Michael Davis, 11-Aug-2003, 03:39pm
I was close :-)
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