How Do You Know Your Rear Diff Drive Ratio

[churchy]

HI, EVERYBODY,

MY REAR DIFF IS MAKING ONE HELL OF A NOISE AND WILL REQUIRE CHANGING BUT HOW CAN I FIND OUT THE DRIVE RATIO

THE DONOR CAR IS A SIERRA 2 LITRE WHICH WAS MADE IN 1983, THE GEARBOX IS A 5 SPEED WITH THE FIFTH GEAR BEING AN OVERDRIVE IF THIS HELPS

THERE WAS A TAG ON THE REAR DIFF WITH SOME NUMBERS ON IT BUT IT MEANS NONTHING TO ME, ON THIS TAG WAS TWO ROWS OF NUMBERS

 

TOP ROW 3BG4006 LC

BOTTOM ROW A338 3F 15

 

CAN ANYONE HELP ME OR POINT ME IN THE RIGHT DIRECTION

 

CHEERS ANDY

[niduncan]

Hi, the answer is in the bottom row, it is a 3.38

[churchy]

THANKYOU NIGEL, I LEARN SOMETHING NEW EACH DAY AND AM AMAZED HOW GOOD THIS FORUM IS, THANKS AGAIN

[sj-bradley]

ALL CAPITALS IS HARD TO READ - It's also considered to be "SHOUTING"

 

Simon.

[Guest mower man]

I used to run a 3.38 but found it to long for the power I have ,replaced by a 3.6 all good HTH mowerman

[Grim]

3.38s are also dearer, I wouldn't pay the premium for one.