So it would appear. Oops!
The larger shaft of the GT6 gearbox can be cut down to the right length and an alternative clutch disk would have to be substituted to fit the 1" diameter of the shaft. And the resulting ratios for the gears would be: 1st: 2.65:1 2nd 1.78:1 3rd 1.25:1 4th 1.00:1 Reverse 3.1:1 Whereas, the Early Spit has the following gears: 1st: 3.75:1 2nd 2.16:1 3rd 1.39:1 4th 1.00:1 Reverse 3.75:1 Joe -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Sunday, December 21, 2003 3:41 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Transmission Joe, read the original message again. The second gearbox is a "KC" gearbox. If unaltered on the inside, etc., that means it's a GT6 gearbox, and in most cases the ratios simply aren't suitable for the four-cylinder engines. Oh, and then there's the different input shaft, and (if present) different bellhousing/clutch throwout arm/slave cylinder issues, etc., etc., not to mention changing the output flange, etc., etc. As fare as the differences between 3- and 4-synchro Spitfire gearboxes, yes, the 4-synchro is a bit longer. But in most cases, the Spitfire's sliding spline driveshaft can compensate for the 5/8" difference in length...once that driveshaft's input flange is changed to one that will bolt up to the larger flange on the later gearbox. --Andy Mace In a message dated 12/21/2003 5:15:46 PM Eastern Standard Time, [EMAIL PROTECTED] writes: Paul, Yes, you can use the full synchro gearbox but you will have to shorten the driveshaft (or use one specifically made for that gearbox. When the synchro for first gear was added, the gearbox was lengthened slightly. The ratios are the same except for fitst gear. The early boxes has a first ratio of 3.75:1 but was changed to 3.5:1 in later full synchro boxes. Regards, Joe Curry -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul-Ernest Levesque Sent: Sunday, December 21, 2003 2:08 PM To: [EMAIL PROTECTED] Subject: Transmission Hello I am restoring a 1970 Spitfire MK 3 and have on hand two trasmissions the one on the car now is number FD 00715 non syncro on first gear, and the other on is KC25819 *** http://www.team.net/the-local *** *** unsubscribe/change address requests to [EMAIL PROTECTED] or try *** http://www.team.net/cgi-bin/majorcool *** http://www.team.net/mailman/listinfo *** Archives at http://www.team.net/archive *** Edit your replies!
