Thought id double check on here since you are all such a great help.

The parts car im looking at buying is a series 3 1983 but it has a 3.4 litre engine.

The parts I was after were the complete rear carriage including brakes,diff,suspension. Would this still bolt into the series 2 with it being a 3.4 instead of a 4.2? and is the diff bolt pattern the same 4 bolt as a series 2?

Also the transmission, Would the transmission fit a series 2 that has a 4.2 litre or are the transmissions different? as I was after a series 3 trans instead of rebuilding my series 2 one. I know the 4.2 series 3 transmission fit but unsure of the 3.4

and the bonnet, which in my last post said it will fit so that is one thing that i can use (: but don't want to buy a whole car if i cant use the rear end or transmission

Are there parts on the 3.4 series 3 which are different from the 4.2 series 3?


Thanks in advance

 

Yes, All the rear cages, series 1,2,3 XJ6, XJ12 and all XJS will interchange.
Having said that the one you want is the from a Mid 90's XJS convertible with the outboard vented rear rotors. This unit has better brakes, slightly better Ujoints and better axle ratio. It also has reinforced hubs that are less prone to cracking. Any car making serious HP needs this upgrade on safety alone.

As far as I know the XK engine blocks are all the same and displacement increases are form cylinder bore increases. So I think the trans will bolt up.

 

Thanks,

and yes I don't plan on having this rear end as a final thing I just need something for the mean time as i don't own a transporter and it's hard to move about having no brakes or diff. was just going to get a parts car as i need a few extra bits and pieces also and the car it self is rather cheap.

Also i have a factory series 2 which would always be good having spare parts for that if i ever need them as well.

do the xjs have an lsd diff?

 

Early Ser IIIs used the BW65 gearbox. After a year or two a switch was made to the BW66....which is essentially a beefed-up '65.

I *think* Ser IIs were still using the BW12 gearbox...which is worth saving. A bit more stout than either the 65 or 66...a kissin' cousin to Ford's "FMX" trans used in the 60-70s behind medium size V8s.

In any case the BW65, BW66, and BW12 should physically bolt up to any Ser III or Ser II 4.2 with no problems. There might well be differnces in linkages and details....you can count on it....but it should all be "doable" with a donor car alongside.

Cheers
DD

 

Thanks, have got my trans out just haven't got the money yet to get it rebuilt but will end up getting it rebuilt when i have funds then everything on the car will be rebuilt with receipts just thought about putting in the trans out of this parts car since its a good trans and it will give me transport again at 1/4 the price of saving to get it rebuilt and will give me parts for my project jaguar.

Thanks for the help guys

 

I suspect the diff ratio will be different for the 3.4 litre car, as the engine is not so powerful. The 3.4 litre version of the late XK engine was a good unit, but was not common as it was sold to a lower spec of trim. Cars with it were available with a 5-speed manual gearbox too.

The later 3.4 engine is not the same as the original 3.4, as it uses the bore centres of the 4.2 with smaller bores, but same stroke.

 

Cheers guys, and the diff ratio would be fine as it would spin the wheel easier but sadly the guy sold it to someone else as he didn't want the hassle of delivering but good to know all the info i got from you guys. plan to own these jaguars for a very long time and will keep an eye out for another parts car