Which Gearbox

[vinvan]

Hi Yall
Im sure someone can give me an answer, just about to put the engine and box in our van we have a 1600tp with a standard gearbox, we also have a 6 rib box,
we are going to eventually have a 1776cc built which we will be using the 6 rib
the question is can i use the 6 rib with the 1600?
will there be any drawbacks or advantages

Thanks
Vinvan

 

[vinvan]

bump

 

[nobbly]

Hiya Vinvan!

My opinion only...

I reckon the 6-rib will be too tall for a standard 1600 - you'll spend 1/2 your life in 3rd gear - especially if it's a fully loaded camper. When you go bigger, consider the six-rib then. It's not much more work to swap the box at the same time!!

Just my opinion, but as you know I was 3-rib all the way until plans changed and a 2.0 type 4 came along.

Cheers, Dave

 

[vinvan]

Thanks Nobbly
very good point
any more comments

 

[Tofufi]

As above, the 1600 will struggle a bit with the gearing of the 6-rib.

I've a 5 speed 'box, and the 5th gear is fairly similar to 4th in a 6-rib. But 5th gear really is too tall for the steeper motorway hills with my 1600 with twin carbs. With the 5 speed box, 4th is the same as a 3-rib gearbox 4th gear, which is great as it allows me to pull up the hills at normal camper speeds. The 6 rib gearbox gears are spaced further apart and would struggle even more

 

[bertiethebus]

You could go for a CK code box (1700) better cruising than the 3 rib stock 1600 box but not too tall for it, then also canny for your 1776 too!
You'll have to modify your shift linkage etc with the 091 as its longer.
I'm running a CK mated to a 2.0 and its canny good but I'll go 6 rib eventually when I find the right one

 

[Trikky2]

The 1700 used the same gearing as the 1600. The taller gearing came in with the 1800 engine.

 

[bertiethebus]

The 1700 used the same gearing as the 1600. The taller gearing came in with the 1800 engine.

Sorry but I was under the impression the CK code box diff is 5.375 and the 1600 box I removed was 5.875 :|

 

[Trikky2]

The 1700 used the same gearing as the 1600. The taller gearing came in with the 1800 engine.

Sorry but I was under the impression the CK code box diff is 5.375 and the 1600 box I removed was 5.875 :|

If the box you removed was 5.875 then it was a low ratio or "mountain" box.

Hope this helps clarify things

Final drive ratios for all gearboxes; (95%of 1-4th gearsets are the same just the dif that changes)

1600 engine

CA - 5.375 68-71

CB - 5.857 68-71 low

CC - 5.375 68-71

CD - 5.857 68-71 low

CE - 5.428 72-75

CF - 5.857 72-75 low

CG - 5.375 72-75

CH - 5.857 72-75 low



1700 engine

CK - 5.375 72-73

CL - 5.375 72-73



1800 engine

CM - 4.857 74-75

CN - 4.857 74-75



2000 engine

CP - 4.571 76-79

CT - 4.571 76-79



Later 1600 engine

CU - 5.428 76-79

CV - 5.428 76-79

CW - 5.857 76-79

CX - 5.857 76-79

 

[le catweasel]

Im sure my 68 has a CO gearbox, am i correct? If i am does anyone know the ratios of a CO? I need something better for cruising haha

Thanks

 

[sparkywig]

Im sure my 68 has a CO gearbox, am i correct? If i am does anyone know the ratios of a CO? I need something better for cruising haha

Thanks

It's the same as a CA gearbox.