Jump to content

L hand spacer for diff.front mounting SpitfireMk1V


Unkel Kunkel
 Share

Recommended Posts

Can anyone through some light on this for me please?

The parts suppliers list a “spacer washer “ but  for “Left hand “ only for the front diff mounts on the Spitfire.

Is this something to do with torque action on the mounting?

I don’t have one of these   fitted on my Mk 1V (just the thinner washers each side)

- should there be one?

If so,does it fit under the thin washer or above the bush?

Link to comment
Share on other sites

I have seen them fitted, but no idea why. Arguments range from levelling the car due to the weight of the driver always being on one side; to offset the rotation of the propshaft forcing one side of the car down, and the alignment of the planet Jupiter with the steering wheel.

Take your pick! 

However, like the petrol additive tin thingies you see advertised, no-one seems to be able to prove that they actually do anything, or that the lack of them makes any difference.

Link to comment
Share on other sites

Out of interest, what cars did you find them on?I amthinking my experiences are mainly late60's heralds/vitesse, plus mkIV/1500 spits, plus a few mk3, and a splattering of GT6's. But not early heralds.....

Thinking perhaps they were used on early cars?? at a guess.

Link to comment
Share on other sites

Part number 134603 in Rimmer's catalogue. I asked the question a while back and convinced myself it should have been fitted but was missing.(1980 Spitfire 1500) The mounting studs on the car underside are "stepped" in diameter and this dictates that it fits under the rubber mounting but on top of the steel washer. HOWEVER, fitting it compresses both the upper and lower rubber mountings and so must alter the alignment of the diff to the propshaft. The workshop manuals all say that with everything in place and torqued up, it should be possible to rotate the lower rubber mounting so the spacer is counter-productive; I've taken mine back off. I hope this helps but it's still a mystery!

Link to comment
Share on other sites

P.s. I measured the distance from the garage floor to the top of the rear wheelarches, vertically through the wheel centre before fitting, after fitting and after removal of this washer and found it altered the measurements each side between 1/4" and 5/16", lowered one side/raised the other side.  (Sorry for being so long-winded...)

Link to comment
Share on other sites

15 hours ago, clive said:

Out of interest, what cars did you find them on?I amthinking my experiences are mainly late60's heralds/vitesse, plus mkIV/1500 spits, plus a few mk3, and a splattering of GT6's. But not early heralds.....

Thinking perhaps they were used on early cars?? at a guess.

Always on Spitfires, Clive, not on anything else so far.

Link to comment
Share on other sites

I still just don’t get it at all !

As we know, there are 2 rear bushed mounting points secured by a log horzontal bolt and two front bushed mountings from which the front of the diff is supported/ hangs. 

So what effect can putting a spacer in  just one of these 4 points have?

if so why  just the left.p and not the right?

and if it is fitted how does it not compromise the tighting of that mounting?

 

 

 

 

Link to comment
Share on other sites

It measures 2"o.d., 5/8" i.d. by 1/4" in thicknesses, when in place it compresses both the lower and the upper rubber mounts by  that 1/4", I'm guessing that in doing so it's twisting the diff clockwise ever so slightly when viewed from the rear, hence the effect on the ride height. I had it fitted for around a month and it hasn't done the Polybush mountings any good at all, I would like to replace them again. It was suggested that perhaps the mystery washer would counteract any effects of torque on the diff but I am honestly no wiser. However, there MUST be a happy medium with the assembly detail in the workshop manuals stating that the lower rubber mounting washer must be free to rotate when everything is tightened up. Too free and you've got a sloppy mounting, too tight: are you affecting alignment?

15070293501241819127419.jpg

Link to comment
Share on other sites

7 hours ago, Colin Lindsay said:

Always on Spitfires, Clive, not on anything else so far.

Oh well,that is me wrong. 

My old 1500 spit was very original/unwelded when itcame to me. I swapped the diff on that (original diff) and deinately no spacer there. I suspect most of the cars I have had the diff out at some point priortomy ownership.

 

I really cannot see a reason for them. Ho hum. All it will do is make the diff, and therefore the spring, lean to one side a little.

Link to comment
Share on other sites

I would say yes, that more or less sums up where I'm at with it... the mysterious spacer. My pet puzzle. (If you really want a puzzle or two to mull over, there are one or two anomalies in the workshop manual and car handbook wiring diagrams, particularly in the detailing of the oil warning light/PDWA warning light area, having the U.K. and North American mixed up... thread drift alert!)

Link to comment
Share on other sites

Pete: I really don't know to be honest. I started thinking that if the bolts that fasten the frame to the diff body weren't a dowelled fit through the frame, it introduced a further avenue for error/misalignment. The other factor was that the diff on the car is not the factory fitted one, the car's first owner had it replaced just before I got the car 10 years ago; he was advised to do this to cure a clicking noise from the rear! The top and bottom of it was that I was putting a lot of thought, time and effort into it and not actually achieving any improvement, but still not exactly happy with it either...

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...