Thermotec

Dear friends,
Could you please inform me about which 9" rear diff. is suitable( from what other cars and models ) for my 1989 Ford Sierra Sapphire RS coswoth 2WD .
Thanks

Stakis

iTrader: (1)

9" came only form 909?

Thermotec

Hi, Thanks for your answer but please expalin what is 909 ?

Tommen

That is the 3 first numbers in ford motorsport (cosworth era) finis code

-beefy-

iTrader: (6)

909 is basically ford motorsport mate ,

what hes saying is the 9 inch diff wasnt available on a production car ,

there was a 8.8 inch diff available in the mustangs if i rember correctly ,

other options a a 7.5 gripper diff , or another uprated standard unit ,

hope this helps ,

beef

Thermotec

Thanks guys..
My car has a major tire wear problem. 1st, 2nd, 3rd gears till the end the tires skid and the car becomes uncontrollable. I have bilstein coilovers and hard srings, the car is very rigid. This week end I will take off the springs to see theri tention and maybe replace them with softer ones. Please advice any other methods to keep the car straight on the road..
Thanks

Char1ie

iTrader: (6)

Your rear springs are too hard I think so softer springs at the back will help.

Also rear beam mounts should be very stiff, good diff mount, softer settings on your damping.

Charlie

Mike1

How did your car go at the first race of the year Charlie. Have your chassis mods over the winter paid off with the "feel" of the car?

Twellsie

iTrader: (1)

6 degree rear beam

Thermotec

Thanks Charlie,
I will check the springs first as you say. The rear beam mounts are metal to metal since the car has been driven as race track car first, later converted to GRP A rally car and now I used it after midnight race car on the highways..

0sierras0

is there an 9 degree rear beam also?

Thermotec

Dear freinds,
Excuse my ignorance I live in Turkey and try to make my ultimate race car with very limited parts availibility and almost impssible used items import.( by customs ) I am not familiar with 6 or 9 degrees rear beam.
Please advise..
Thanks

rinus_2005

iTrader: (1)

Below a few links that can help to shed some light on the rear beam
https://passionford.com/forum/showth...highlight=beam
https://passionford.com/forum/showth...gree+rear+beam

LHD220Turbo

iTrader: (4)

Hello

also quite a good read here; diff options have been discussed many times

https://passionford.com/forum/general-car-related-discussion/243064-2wd-diff-options.html