489 gear ratio help needed

[discharger1332]

i scored a 489 case with sg and richmond gears. all looks pretty fresh. but im not sure how to tell what ratio the grars are? i thought they would be stamped in but theese are the only numbers i see. any help is apreciated.

RICHMOND
4 82-7313-1 8620

 

[fanofpetty]

If you can't find the gear ratio stamped on the ring gear, simply count the teeth on the ring gear and then count the teeth on the pinion, and divide. for example if theres 43 teeth on the ring gear, and 10 on the pinion, it would divide to 4.3 ( 4.30s) I hope this helps.

 

[805moparkid]

If you can't find the gear ratio stamped on the ring gear, simply count the teeth on the ring gear and then count the teeth on the pinion, and divide. for example if theres 43 teeth on the ring gear, and 10 on the pinion, it would divide to 4.3 ( 4.30s) I hope this helps.

yea my richmonds didn't so i had to count the teeth

 

[OldmanRick]

Go to Pg.5 for tooth count.

[ame]http://www.richmondgear.com/07pdfs/RGCatalogbody.pdf[/ame]

 

[mischiefdart]

Judging by the height of the ring gear I would guess 4.56-4.86

 

[OldmanRick]

Counting the teeth between bolts and multiplying looks like 43 ring gear teeth, obviously just a guess. If thats true according to the chart it's a 3.91, 4.30 or 5.38 which i doubt. Really need to count both.

Nice score though:thumblef:

 

[discharger1332]

i got 43 ring and 10 pinion. but i should double check i got 11 first time and 10 sencond time.

 

[OldmanRick]

i got 43 ring and 10 pinion. but i should double check i got 11 first time and 10 sencond time.

It looks real clean, so just take a felt tip pen and make a mark on one tooth. Makes it easier to see. Then count away