Lotus Elan

5 speed +2 gearbox into small elan

PostPost by: "Roger Brownless&quo » Sun Jun 05, 2005 11:40 am

I have an Elan +2 5 speed gearbox which I
want to install into my 'baby' Elan, I am missing one important piece of
information:- How long does the propshaft need to be ?
ie, I have the correct +2 propshaft, but it needs to be shortened
............. but by how much ?
I would be grateful if somebody could supply me with this information.
"Roger Brownless&quo
 

PostPost by: john.p.clegg » Sun Jun 05, 2005 2:42 pm

Roger

My plus2 shaft is 33 1/2" between u/j centres,so now all we need is a "baby" shaft and you can work it out
John


Roger Brownless <***@***.***> wrote:
I have an Elan +2 5 speed gearbox which I
want to install into my 'baby' Elan, I am missing one important piece of
information:- How long does the propshaft need to be ?
ie, I have the correct +2 propshaft, but it needs to be shortened
............. but by how much ?
I would be grateful if somebody could supply me with this information.
User avatar
john.p.clegg
Coveted Fifth Gear
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Posts: 5691
Joined: 21 Sep 2003
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PostPost by: "Roger Brownless&quo » Fri Jun 17, 2005 9:22 am

The idea was to have a complete 'kit' of parts ready to install,
BEFORE removing the old 4 speed box etc !! I dont want the car to be
off the road/track while I get the propshaft shortened, so I was
trying to establish the required dimension now, and get it modified
in preperation for the transplant, somebody MUST have done it before
and made a note of the measurement ? PLEASE !!

I already know the following dimensions:-
'Baby' Elan Prop:- Distance between diff flange face and end of
splined shaft is 26.5" or 67cms (approx and no sliding joint)
Elan +2 5 speed propshaft is 39.5" or 100cms between UJ Centres, with
incorporated sliding joint.
Elan +2 4 speed propshaft is 33.5" or 85cms between UJ Centres (no
sliding joint) So 6" shorter than the 4 speed prop ....... I really
need to know the 'between UJ Centres' measurement of a 4 speed baby
elan prop, and then subtract 6" ? Anybody agree or disagree ?
Thanks All,
Roger.


--- In ***@***.***, JOHN CLEGG <[email protected]>
wrote:
Roger

My plus2 shaft is 33 1/2" between u/j centres,so now all we need is
a "baby" shaft and you can work it out

John


Roger Brownless <[email protected]> wrote:
I have an Elan +2 5 speed gearbox which I
want to install into my 'baby' Elan, I am missing one important
piece of

information:- How long does the propshaft need to be ?
ie, I have the correct +2 propshaft, but it needs to be shortened
............. but by how much ?
I would be grateful if somebody could supply me with this
information.






"Roger Brownless&quo
 

PostPost by: "Roger Brownless&quo » Fri Jun 17, 2005 10:44 am

OK that should have been 6" LONGER than the 4 speed prop, not
shorter !!

--- In ***@***.***, "Roger Brownless"
<[email protected]> wrote:
The idea was to have a complete 'kit' of parts ready to install,
BEFORE removing the old 4 speed box etc !! I dont want the car to
be

off the road/track while I get the propshaft shortened, so I was
trying to establish the required dimension now, and get it modified
in preperation for the transplant, somebody MUST have done it
before

and made a note of the measurement ? PLEASE !!

I already know the following dimensions:-
'Baby' Elan Prop:- Distance between diff flange face and end of
splined shaft is 26.5" or 67cms (approx and no sliding joint)
Elan +2 5 speed propshaft is 39.5" or 100cms between UJ Centres,
with

incorporated sliding joint.
Elan +2 4 speed propshaft is 33.5" or 85cms between UJ Centres (no
sliding joint) So 6" shorter than the 4 speed prop ....... I
really

need to know the 'between UJ Centres' measurement of a 4 speed baby
elan prop, and then subtract 6" ? Anybody agree or disagree ?
Thanks All,
Roger.


--- In ***@***.***, JOHN CLEGG <[email protected]>
wrote:
> Roger
>
> My plus2 shaft is 33 1/2" between u/j centres,so now all we need
is

a "baby" shaft and you can work it out
> John
>
>
> Roger Brownless <[email protected]> wrote:
> I have an Elan +2 5 speed gearbox which I
> want to install into my 'baby' Elan, I am missing one important
piece of
> information:- How long does the propshaft need to be ?
> ie, I have the correct +2 propshaft, but it needs to be shortened
> ............. but by how much ?
> I would be grateful if somebody could supply me with this
information.
>
>
>
>
>
"Roger Brownless&quo
 

PostPost by: john.p.clegg » Fri Jun 17, 2005 11:20 am

Roger
Seems to me that if the propshaft difference between the 4 and 5 speed plus2 is -6",then the same should apply to the "baby elan".
that being so i don't understand the problem? You have the measurements of the "baby" propshaft???
thanks
John


Roger Brownless <***@***.***> wrote:
The idea was to have a complete 'kit' of parts ready to install,
BEFORE removing the old 4 speed box etc !! I dont want the car to be
off the road/track while I get the propshaft shortened, so I was
trying to establish the required dimension now, and get it modified
in preperation for the transplant, somebody MUST have done it before
and made a note of the measurement ? PLEASE !!

I already know the following dimensions:-
'Baby' Elan Prop:- Distance between diff flange face and end of
splined shaft is 26.5" or 67cms (approx and no sliding joint)
Elan +2 5 speed propshaft is 39.5" or 100cms between UJ Centres, with
incorporated sliding joint.
Elan +2 4 speed propshaft is 33.5" or 85cms between UJ Centres (no
sliding joint) So 6" shorter than the 4 speed prop ....... I really
need to know the 'between UJ Centres' measurement of a 4 speed baby
elan prop, and then subtract 6" ? Anybody agree or disagree ?
Thanks All,
Roger.
User avatar
john.p.clegg
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PostPost by: "Roger Brownless&quo » Fri Jun 17, 2005 1:33 pm

John,
The propshafts are intrinsically different, the 4 speed props
allow for slight length variations by having an internal splined
sleeve that goes into the tailshaft of the gearbox, through an oil
seal, whilst the 5 speed prop has a 'sliding spline' arrangement
built into it, with a 4 bolt flange at both ends, hence the 'overall
length' measurement that I currently have for the 4 speed baby elan
prop, is of little use, I need the 'between centres of the UJ's'
measurement, then I can do the 'double comparison' maths ......... I
really hope that makes sense !!
Cheers,
Roger.

--- In ***@***.***, JOHN CLEGG <[email protected]>
wrote:
Roger
Seems to me that if the propshaft difference between
the 4 and 5 speed plus2 is -6",then the same should apply to

the "baby elan".
that being so i don't understand the problem? You have the
measurements of the "baby" propshaft???

thanks
John


Roger Brownless <[email protected]> wrote:
The idea was to have a complete 'kit' of parts ready to install,
BEFORE removing the old 4 speed box etc !! I dont want the car to
be

off the road/track while I get the propshaft shortened, so I was
trying to establish the required dimension now, and get it modified
in preperation for the transplant, somebody MUST have done it
before

and made a note of the measurement ? PLEASE !!

I already know the following dimensions:-
'Baby' Elan Prop:- Distance between diff flange face and end of
splined shaft is 26.5" or 67cms (approx and no sliding joint)
Elan +2 5 speed propshaft is 39.5" or 100cms between UJ Centres,
with

incorporated sliding joint.
Elan +2 4 speed propshaft is 33.5" or 85cms between UJ Centres (no
sliding joint) So 6" shorter than the 4 speed prop ....... I really
need to know the 'between UJ Centres' measurement of a 4 speed baby
elan prop, and then subtract 6" ? Anybody agree or disagree ?
Thanks All,
Roger.





"Roger Brownless&quo
 

PostPost by: M100 » Fri Jun 17, 2005 2:37 pm

On Fri, 17 Jun 2005 09:22:55 -0000, "Roger Brownless"
<***@***.***> wrote:

The idea was to have a complete 'kit' of parts ready to install,
BEFORE removing the old 4 speed box etc !! I dont want the car to be
off the road/track while I get the propshaft shortened, so I was
trying to establish the required dimension now, and get it modified
in preperation for the transplant, somebody MUST have done it before
and made a note of the measurement ? PLEASE !!

I already know the following dimensions:-
'Baby' Elan Prop:- Distance between diff flange face and end of
splined shaft is 26.5" or 67cms (approx and no sliding joint)

26.5" ? That's not what mine measures!

27.5" Overall length diff flange to end of the splined shaft
21.125 " UJ centres
1.1875" Diff end UJ centre to diff flange
5.3125" Gearbox end UJ centre to end of splined shaft

Martin

72/45

--
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72 Sprint DHC
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PostPost by: M100 » Fri Jun 17, 2005 3:06 pm

On Fri, 17 Jun 2005 15:37:27 +0100, Martin Evans
<***@***.***> wrote:

27.5" Overall length diff flange to end of the splined shaft
21.125 " UJ centres
1.1875" Diff end UJ centre to diff flange
5.3125" Gearbox end UJ centre to end of splined shaft

Make that "around 27.5" ! (27.625")

Martin

72/45

--
Martin
72 Sprint DHC
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Location: Yorkshire

PostPost by: "hopefully_watching& » Fri Jun 17, 2005 8:08 pm

If you have not looked at the Lotus Service Bulletin on LotusElan.net
for retrofitting a +2 with the 5 speed. It has a complete list of
parts. It would be a good checklist to make sure you have thought of
everything.

http://www.lotuselan.net/publish/lpb_fi ... conv.shtml

jeff
"hopefully_watching&
 

PostPost by: "Roger Brownless&quo » Sat Jun 18, 2005 11:24 am

Thanks Jeff,
I was aware of that very useful bulletin, what I really
need is details of the Propshaft part No:- A036 R 0038Z I have already
fabricated a modified gearbox crossmember and obtained the correct
speedo cable etc, so I reckon I've got everything covered except for
the damn propsahft !!
All advice very much appreciated,
Regards,
Roger. (Epsom, Surrey, UK)

--- In ***@***.***, "hopefully_watching" <[email protected]>
wrote:
If you have not looked at the Lotus Service Bulletin on LotusElan.net
for retrofitting a +2 with the 5 speed. It has a complete list of
parts. It would be a good checklist to make sure you have thought of
everything.

http://www.lotuselan.net/publish/lpb_fi ... conv.shtml

jeff
"Roger Brownless&quo
 

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