Lotus Elan

Help with rear suspension.

PostPost by: marklowe » Sat Mar 21, 2009 4:53 pm

Hi
I?ve spent all afternoon struggling and am back to were I started.
I?m trying to build up the rear suspension on a new chassis, and decided this was also the time to fit Mick Miller driveshafts.
When I?ve fitted the original driveshsfts with donuts before I?ve done it with the suspension all connected up, and jacked up the upright till everythings in line and then fitted the driveshaft, no real problems.
I have assumed that as the Mick Miller shafts have studs permanently fitted that they will be to long for this method.
I?ve connected the new CV drive shaft to the outer shaft on the upright, connected the top of the upright to the lotocone , then intended to jack up the upright and connect the lower wishbone to the upright, and the CV drive shaft to the diff output shaft.
As far as I could see it should work, but it has been a right strudel and I?m back to square one.
I?m sure another of those jobs that?s easy when you know how, PLEASE, PLEASE, PLEASE tell me how.

Mark
User avatar
marklowe
Second Gear
Second Gear
 
Posts: 91
Joined: 08 Feb 2007
Location: Stoke-on-Trent

PostPost by: elansprint71 » Sat Mar 21, 2009 7:02 pm

Mark
You've not said exactly what the problem is- does the shaft assembly appear "too long"?
I fitted the MM shafts with a Spyder twin-wishbone set up and it literally all fell together.

Is the body off the chassis?
elansprint71
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 4092
Joined: 16 Sep 2003
Location: Cheshire, UK.

PostPost by: alan71 » Sat Mar 21, 2009 7:09 pm

I would remove the adaptors from the CV joints, by undoing the socket head screws, and bolt them to the inner and outer drive shafts. They can be quite a tight fit you may need to open up the holes slightly. Assemble the rest of the suspension and then replace the CV joints and intermediate drive shaft.

Alan
alan71
Second Gear
Second Gear
 
Posts: 222
Joined: 15 Jul 2007
Location: UK

PostPost by: marklowe » Sat Mar 21, 2009 9:33 pm

Hi
I think the problem is that the upright and CV shaft as an assembly is just to unwieldy to control, as the chassis is bare it has no weight and moves about when trying to jack the upright.
Jacking the upright and trying to line up the drive shafts and the lower wishbone at the same time, even with two people its like trying to fight an octopus.

Mark
User avatar
marklowe
Second Gear
Second Gear
 
Posts: 91
Joined: 08 Feb 2007
Location: Stoke-on-Trent

PostPost by: AussieJohn » Sat Mar 21, 2009 10:19 pm

I found it was easier to compress the spring a bit then jack it into position, cheers, John.
AussieJohn
Third Gear
Third Gear
 
Posts: 447
Joined: 10 Jun 2007
Location: Yorkshire

PostPost by: alexblack13 » Sun Mar 22, 2009 8:09 pm

Hi Guys,

I used a pair of those ratchet straps to position the suspension where it needed to be. Just ratchet the 'A' frame up to the position you need. I.E. Level. My drive shafts as you can see are Spider.

Remember.. The CV joints will 'plunge' for the want of a better word. The length can be varied when fitting. This allows for your suspension travel whilst moving.

Hope this helps.. Ratchet straps like these are V cheap and great for all sorts of jobs. I bought them to Hold down my Honda Pan European Motorcycle on the North sea ferries. :)


Alex B.... 8)
Attachments
brake and driveshaft N.S 018 (Small).jpg and
brake and driveshaft N.S 016 (Small).jpg and
Alex Black.
Now Sprintless!!
User avatar
alexblack13
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2357
Joined: 17 Oct 2007
Location: Fife Scotland

PostPost by: elansprint71 » Sun Mar 22, 2009 8:37 pm

Mark,
I understand the problem- of course with the twin wishbone set-up, I just disconnected the lower wishbone.

Alex's solution looks a good one.
elansprint71
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 4092
Joined: 16 Sep 2003
Location: Cheshire, UK.

PostPost by: marklowe » Sun Mar 22, 2009 10:23 pm

Hi
My problem is that the CV drive shafts have studs fixed to the ends, although I haven?t tried it I imagine that they are to long to fit the gap between the inner and outer drive shafts.
I think there is a need to disconnect the upright and swing it out slightly, locate the CV drive shaft then close in the upright and reconnect it.
The drive CV drive shafts do have some ability to expand and contract, can they be wiggled in with the suspension connected and raised to the correct height?

Mark
User avatar
marklowe
Second Gear
Second Gear
 
Posts: 91
Joined: 08 Feb 2007
Location: Stoke-on-Trent

PostPost by: garyeanderson » Sun Mar 22, 2009 10:34 pm

A photo for those of use the at verbably chalanged
Image
User avatar
garyeanderson
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 3128
Joined: 12 Sep 2003
Location: Massachusetts, U.S.A.

PostPost by: jimj » Sun Mar 22, 2009 11:08 pm

Yes Mark, you connect up the Lotocones etc. just leaving the 2 bolts out of the bottom of the upright and swing the whole thing out an inch to clear the studs.
Jim
jimj
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1134
Joined: 25 Feb 2008

PostPost by: marklowe » Sun Mar 22, 2009 11:21 pm

Hi Jim
Thanks for confirming what I thought, this is what I have been trying but without the body on the chassis.
I think I?ll find it a bit easier to control with the body fitted to the chassis first.

Mark
User avatar
marklowe
Second Gear
Second Gear
 
Posts: 91
Joined: 08 Feb 2007
Location: Stoke-on-Trent

PostPost by: elansprint71 » Mon Mar 23, 2009 8:18 pm

Mark,
I assumed that you had disconnected the wishbone!

Nice logs Gary. :wink:
elansprint71
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 4092
Joined: 16 Sep 2003
Location: Cheshire, UK.

PostPost by: alexblack13 » Mon Mar 23, 2009 8:24 pm

Those look like susan Millar's logs! :lol: :lol: Might not be though!

Alex B....
Alex Black.
Now Sprintless!!
User avatar
alexblack13
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2357
Joined: 17 Oct 2007
Location: Fife Scotland

PostPost by: garyeanderson » Mon Mar 23, 2009 8:40 pm

elansprint71 wrote:Mark,
I assumed that you had disconnected the wishbone!

Nice logs Gary. :wink:


You see pete, I did a search on google for "Mick Miller drivershafts"

and it gave me a list of 10 items that matched, the first one I clicked on was

http://www.mickmillerlotus.com/images/p ... otuscv.jpg

I simply put a [img]

in front of the HTTP

and [/img]

after the JPG and it shows the photo over here. Wonder of wonders a photo of a driveshaft with logs no less. :oops:
User avatar
garyeanderson
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 3128
Joined: 12 Sep 2003
Location: Massachusetts, U.S.A.

PostPost by: marklowe » Mon Mar 23, 2009 10:09 pm

Hi Gary
Yes I was assembling onto a bare chassis and hadn?t connected the bottom of the upright to the wishbone. I?ve always managed to fit donuts before with the wishbone connected but I was pretty sure that the new CV shafts wouldn?t go in the same way.
I had clamps on the springs and was trying to jack the upright into position to line up the drive shafts and the wishbones at the same time. Difficult to control everything at once especially as the chassis would move around when you pushed against it hard.
I?ll fit the body back on before I attempt it again.
Thanks to all for there advice.

Mark
User avatar
marklowe
Second Gear
Second Gear
 
Posts: 91
Joined: 08 Feb 2007
Location: Stoke-on-Trent
Next

Total Online:

Users browsing this forum: No registered users and 8 guests