axel ratio

[oldbluechevy78]

This might be a dumb question but i picked up an 84 chevy 3/4 ton suburban for the axels. It has the 6.2 litter in it and i was told that the Diesel have a higher gear ratio in their axels, like a 2.43. I thought that the 3/4 tons had the lower 4.10 ratio which is what I want. Is their a way to identify the ratio on the axel tag or not?

any help would be great

 

[DaveB]

This might be a dumb question but i picked up an 84 chevy 3/4 ton suburban for the axels. It has the 6.2 litter in it and i was told that the Diesel have a higher gear ratio in their axels, like a 2.43. I thought that the 3/4 tons had the lower 4.10 ratio which is what I want. Is their a way to identify the ratio on the axel tag or not?

any help would be great

You can do any of the following:
get the build numbers off of the axle and look up what it was built with.

Take the covers off and count the teeth on the pinion and ring gears or read the numbers that are stamped on the ring gear.

Roll the sub on the ground for one wheel rotation and count how many times the driveline turns.

Or if you are lucky read it off of the tag on the diff cover.

 

[rkillpack]

Look in the Golve Box.

Sometimes there is a sticker that will flat out tell you. I bought an axle and it was right there on the glove box, at least in a camper special

 

[oldbluechevy78]

thanks for the info i'll check those and see

 

[oldbluechevy78]

There was no stickers, tags or anything to tell me what gear ratio is in it. How do you do the tire rotation formula. I mean for one rotation of the tire to the truns of the driveline how do you tell what ratio you have?
Its probably an esey answer but i'm haveing a brain malfuntion.

 

[anvil]

Roll the sub on the ground for one wheel rotation and count how many times the driveline turns.

Just like he said. Draw a line on the driveshaft so It will be easier to count how many times it turns. 4 & 1/8 turns would be 4.10 gears. 3 & 3/4 turns would be 3.73 gears.

 

[oldbluechevy78]

thnks anvil

 

[Hickey]

I would guess 3.73 gears.