My TVR Tasmin has the Jag XJS rear in it and has always had a bit of an overly neg camber 5 or so degrees. Replaced the bushings to see no change, now I have a bad u joint so I'm just going to replace all of them while I'm at it. I'd like to get back to about 1.5 degrees or so. How many of the shims would you suggest ordering and any good source that won't charge as much to ship as they cost as it is something that could easily go in a flat envelope.

 

You may be able to get used ones from David at everydayxj.com

Are you using the thin shims or the plates?

Either way, 5->1.5 is a big movement.

Checking and correcting ride height would be the
first move.

 

Ride height is fine . there are shims in there now, know nothing of the plates.

 

Do you have an inboard braked or an outboard axle?


5 degrees of negative is far too much, so either the kit car maker, when they altered the driveshaft length took too much off, or you are missing a spacer. Extra shims are OK, but a whole stack of them is not clever as they do not positively locate the driveshaft as it should be.

I suggest you remove the shims, test the gap left when you have the wheels at (say) 1 degree negative and post what it is. It might be that you need the spacer as fitted to Factory XJSs when they went to outboard rear brakes, to compensate, in that case, for the removal of the inboard disc.
Greg

 

Each shim is .020" and gives a ¼º change.

The spacer being referred to is, I think, #3 in this illustration and is much much thicker, coming in various choices from about 3mm to 7mm

Halfshaft Assembly-From (V)188105 - Parts For XJS from (V)179737 to (V)226645 | Jaguar Classic Parts UK

I'm curious how you ended up with 5º camber to begin with

Cheers
DD

 

Doug, Please excuse me if you already know, but to get the rear axle the correct narrower width, the Cobra replica kit makers cut and re-weld the Jaguar driveshafts and lower wishbones. My guess is that they do so assuming the spacer is used. If the car is inboard braked, obviously an OEM axle would not need one. So maybe the OP's car is outboard braked, or they kit maker took a touch too much off and it needs the spacer as well as the brake disc?
Greg

 

Doug/Greg, Car was set up for track days by a PO. Brakes are inboard. It handles great with the 5 degrees believe it or not hence why i never got around to shimming til now. I can pull well over a g with the Kumhos it is wearing. FYI TVR isn't a kit car but made in Blackpool England. Right around 2006 or so they were actually the largest British owned automotive manufacturer. Just shows how far the mighty have fallen.

 

Apologies, I did not read the original post properly. Not the original TVR axle, am I right? To get 5 degrees of negative on a standard Jaguar inboard axle is just about impossible, I would say; certainly is on mine, where I run about 0.75 of negative and have only one shim in one side. So maybe the PO modified the axle by machining a bit from the flanges, or even used a thinner rear disc, or modified the bottom wishbone somehow?
You probably already know; but there are rumours TVR will rise again under a new ownership TVR | The official home of TVR
I will believe it when I see the cars actually being driven by paying customers! Cornering sounds fantastic with the car as is, though 5 deg pretty extreme for tyre life in normal fast road use, I suppose?
Greg

 

No they are original axles in there. Tires last about 10k with a bit more out of the inner lip but not insane. That's with 200 treadwear Kumho XS that they have now discontinued in 16s so I'll be looking for a new tire in the spring. Yeah, TVR is back in motion but I doubt the feds will let us have them here in the Nanny States of America.

 

Just had a bit of a google, rather an interesting item. The diff, driveshafts and hubs are Jaguar, but the lower suspension arms, shocker mountings and diff carrier are TVR fabricated items. This is the explanation for why you can get 5 degrees of negative, I believe. The lower arms are made so it becomes possible. Does it look like this underneath?

Greg