1850 1 rail or 3 rail gearbox (?)

Message

MAD micks · #1 Post by **MAD micks** » Tue Oct 16, 2012 6:58 pm

Hi all,

How do you tell the difference between a 1 rail and 3 rail gearbox...?

I have an 1850 'N' reg (1975) and need to know what I've got (searching for a replacement gearbox)...

Thanks!

Carledo · #2 Post by **Carledo** » Tue Oct 16, 2012 7:22 pm

Your car is pre facelift so SHOULD have a 3 rail box however in view of the chequered past and later upgrades applied to some cars, the easy way to tell is to look at the gearshift extension, if it bolts to the top of the main gearbox casing with 4x1/2 steds and nuts, its a 3 rail, if the top of the main case has a flat plate covering it and the gearlever extension protrudes from the back of it , its a single rail. Hope this helps!

Steve

Jon Tilson · #3 Post by **Jon Tilson** » Tue Oct 16, 2012 7:31 pm

Or...
reverse position on single rail is next to 3rd and on a single rail its next to 1st.....

Its a useful anti theft device to fit the wrong o.d gearstick cap....haha....

Jonners

Carledo · #4 Post by **Carledo** » Tue Oct 16, 2012 8:44 pm

Jon Tilson wrote:Or...
reverse position on single rail is next to 3rd and on a single rail its next to 1st.....

Its a useful anti theft device to fit the wrong o.d gearstick cap....haha....

Jonners

Good point Jon but on a 3 rail its next to first! Not what you said!

Steve

MAD micks · #5 Post by **MAD micks** » Tue Oct 16, 2012 10:37 pm

Carledo wrote:
Jon Tilson wrote:Or...
reverse position on single rail is next to 3rd and on a single rail its next to 1st.....

Its a useful anti theft device to fit the wrong o.d gearstick cap....haha....

Jonners
Good point Jon but on a 3 rail its next to first! Not what you said!

Steve

You're heroes!! So. It's a 1st rail if reverse is next to 3rd (as mine is)...?!

Carledo · #6 Post by **Carledo** » Wed Oct 17, 2012 8:52 am

YES!

Steve

Jon Tilson · #7 Post by **Jon Tilson** » Wed Oct 17, 2012 2:01 pm

Note to self....proof read post again before hitting the submit button....

Sorry about that. I maust be getting senile...

Single rail next to 3rd and three rail next to first. Also the gearbox tunnel tray is a bit deeper at the back like 6 inches or so on a 3 rail and only a couple of inches on a single rail.

Thanks Steve...

Jonners

Hoops · #8 Post by **Hoops** » Thu Oct 18, 2012 10:13 am

Can the single rail and 3-rail gearboxes be easily switched (with overdrive)?
I have a mediocre single rail that may need replacing.

MIG Wielder · #9 Post by **MIG Wielder** » Thu Oct 18, 2012 10:37 am

The clutch driven plate is different. The 3-rail box coarse splines, the single rail box has more , finer splines. I think the coin tray may be different as well. Jonners will be around later I imagine to give the word on propshafts etc.
Cheers for now,
Tony.

Jon Tilson · #10 Post by **Jon Tilson** » Thu Oct 18, 2012 11:14 am

I think the props and mountings are the same....but I have to confess to never swicthing one type for another.
The tunnnels and trays are a different shape and in the o-d case the single rail o-d has a different rear case to hold the single rail remote...
so you can use a single rail o-d on either type, but you cant use a 3 rail o-d on a single rail box.

Jonners

Toledo Man · #11 Post by **Toledo Man** » Thu Oct 18, 2012 11:44 am

I've swapped between 3 rail and singe rail on my Toledo. All I can remember is that the clutch is different and the propshaft might have to be changed. Other than that I didn't need to change anything else.

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1850 1 rail or 3 rail gearbox (?)

1850 1 rail or 3 rail gearbox (?)

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Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)

Re: 1850 1 rail or 3 rail gearbox (?)