Does anyone know what transmission this is?

 

Normally there is a plate on the side of the gearbox with the details or at least a number which would help.

 

The Moss box has a cover on a box on top of the main cover giving access to the where the selection finger meets the striker rods.

 

Not to be too critical . . .
but a decent pic of the actual gearbox rather than bell housing, and with both rotated rather than resting on right hand side, would help greatly. That said, the sole pic you offer, confirms the presence of the clutch release . . . hence, we can confirm it's a manual box. The "box on top" that Peter refers to, holding gear lever, selector rods etc has been removed. A picture aimed down into the opening would confirm if it has the 3 selector shafts of the basic 4 speed manual box fitted to the majority of these cars. In this case, there is no electric overdrive fitted , , , hence the long rear snout that carries the rear mount.

I hope this helps, but some accurate details of car model, year, engine etc and, at the very least, decent pictures would best help us help you.

Cheers and best wishes,

 

I don't have access to the car, so no other images are available. My current transmission is a 4 Speed Moss with overdrive. I want to replace the Laycock overdrive with a short output shaft/housing. The engine and transmission are in a hand-built car, they're not in a Jaguar. I'm currently trying to find out if the Laycock can be replaced with a basic output shaft and housing. There are a few different output shafts and housings available.

 

Can you replace the Overdrive output shaft and housing assembly with a basic output shaft and tail housing?

 

Cool car Jay and thanks for your explanations.

OK . . . you know there were options for with/without OD behind the manual Moss 4spd box and this was accommodated by different output shaft lengths and correspondingly different rear housings.

To fit the box from your original pic, you may need to adjust length of prop shaft, but you may be lucky to find it slips in as is. Back in the day, I rebuilt several of these gearboxes . . . usually new synchro rings, sets of needle rollers, end bearings and seals being sufficient . . . even lower gears may not be chipped or too badly worn. This rebuild is eminently DIY doable, although you may be challenged finding replacement parts. If you do, take particular care with the R&R of interlock ***** and springs. The factory workshop manual will be of great help, as will adequate bench space and total cleanliness.

Cheers and best wishes,

 

I was not sure if the options were available, and it's too expensive to assume it would work without some research. The 3.4 engine and Moss transmission were my first Jaguar rebuild experience. The car is also my first ground up design and fabrication. I'm not interested in using the the transmission in the original photo. It was one of many images I've seen that appeared to be a basic Moss 4 speed with different tail housings.
So, the basic Moss 4 speed gear box with no synchro on 1st gear is the same for several years, correct? Is it possible to remove the Laycock and install the output shaft and tail housing on my current Moss? I rebuilt the Moss that's in the car now. The gears, shafts, synchro rings, and bearings are all new, they have about 1500 miles on them.

 

I'm not sure as I've never tried or thought about doing it - I doubt anyone has. I think the output pinion and shaft are the same on OD and non-OD Moss boxes. So the tailpiece can probably be swapped for the OD. The obvious item missing from the OD gearbox is the speedo drive, so you'd have to find that and a replacement main shaft unless you use a GPS speedometer or something not driven from the gearbox. For me, the OD is so nice to have, I'd not think of being without it and would fix it if it doesn't work.

 

To really get the answer to your question, send an email to Joe at Vintage Jaguar Works in Blackfoot, Idaho ( find their website). These guys know all about our Jaguars
Good Luck !
Schmitty.