speedo cable

poo slinger · Post by **poo slinger** » Tue Jan 07, 2014 5:43 pm

i have an lt77 from a v8 injected rover sd1 in my escort,

do all lt77's have the same speedo drive on the gearbox?

DaveEFI · Post by **DaveEFI** » Tue Jan 07, 2014 6:58 pm

Early SD1s had a mechanical speedo - later ones electronic. If yours came from a Vitesse, it will be electronic and for a 3.08 rear axle, 15" wheels, and 205/60 tyres.

poo slinger · Post by **poo slinger** » Tue Jan 07, 2014 7:05 pm

so it will be 1 of 2 connections?

DaveEFI · Post by **DaveEFI** » Tue Jan 07, 2014 11:36 pm

poo slinger wrote:so it will be 1 of 2 connections?

Not quite sure what you mean?

poo slinger · Post by **poo slinger** » Tue Jan 07, 2014 11:39 pm

what i mean is, are there only 2 diffrent types of connections on the gearbox end of the cable?

DaveEFI · Post by **DaveEFI** » Wed Jan 08, 2014 9:26 am

poo slinger wrote:what i mean is, are there only 2 diffrent types of connections on the gearbox end of the cable?

It must be me, but I still don't understand what you're asking.

There are alternate drives (and internal gears) for different rear axle ratios on both mechanical and electronic types. As far as I know they are all interchangeable, but you do have to use the correct drive gear which is inside the box.

poo slinger · Post by **poo slinger** » Wed Jan 08, 2014 6:48 pm

well i am after getting a speedo cable made to go from lt77 to my ford gagues,

its the gearbox end of the cable i need to find out,

harvey · Post by **harvey** » Wed Jan 08, 2014 7:40 pm

poo slinger wrote:well i am after getting a speedo cable made to go from lt77 to my ford gagues,

its the gearbox end of the cable i need to find out,

All the RV8 LT77's with a speedo cable are the same fitting at the gearbox end. The electronic speedos don't have a cable, but the trigger unit fits in the same place as, and can be replaced with, a mechanical unit.

DaveEFI · Post by **DaveEFI** » Wed Jan 08, 2014 11:49 pm

I think the 3.08 drive (20 teeth) cable drive is NLA from Rimmer, so you might have to search for a used one.

Blown v8 · Post by **Blown v8** » Thu Jan 09, 2014 6:11 am

If you know what ends you need,speedy cables will make you one,

stevieturbo · Post by **stevieturbo** » Thu Jan 09, 2014 11:49 am

www.speedycables.com

Used them in the past myself.

poo slinger · Post by **poo slinger** » Thu Jan 09, 2014 10:30 pm

so i will have to get under the car to determine what one?

DaveEFI · Post by **DaveEFI** » Thu Jan 09, 2014 11:28 pm

poo slinger wrote:so i will have to get under the car to determine what one?

If it is the gearbox from an 'injection' SD1 (which would be a Vitesse, as the EFI is only auto) then it will have a drive for an electronic, not mechanical, speedo. Unless it has already been changed.

bodger · Post by **bodger** » Thu Jan 16, 2014 2:12 pm

DaveEFI wrote:I think the 3.08 drive (20 teeth) cable drive is NLA from Rimmer, so you might have to search for a used one.

I have several mechanical ones , inc the bearing holder ...not sure what colours i have left now

)