Found answer if info that I looked up is right about a 7.5 being wider than it is tall and a 8.8 being taller than wide. Mine is wider than it is tall, so it is a 7.5. Where is the best place to get a 4.10 ring and pinion and a kit as well?



99' Mazda B3000,(3.0L), 2wd. Does anyone know what size I have or know how to tell, is it as simple as a tape measurer and what (I know what but across, up, length or what)?

Thanks for helping, I am wanting to get new gears (4.10) but don't know what size to get.

 

the 8.8 will be round all the way around. and the 7.5 will have 2 flat spots, top and bottom.

 

So this would be a 7.5

 

that looks like a 8.8

i have a 7.5 and mine doesn't look like that

i may be wrong though

 

Why don't you jus look on your back axle, there's a metal tab atatched to it that says what it is.

Also if you're 2wd and below 4.0 you're most likely 7.5. If you're 4.0 you're most likely 8.8. If you're 4WD but 3.0 you can be either...

Aaron

 

That tab at teh top that can't be read I tried. I really would like to know so I can find a set of 3.73 or 4.10 gears for it. I know the gears in it are 3.55 which suck.

 

rather than looking at the cover, take a look under the diff, that rectangulary section thats the lowest point is only about 3/4 of an inch wide on a 7.5 and is a couple inchs wide on an 8.8, but yes, clean off that tag and it is readable, i can almost read it in that picture, if it was scrubed down a little with a brush it would be easily readable.

 

I had it up on the lift at my buddy's shop and the number he needed to figure out what it was is mashed under the bolt head. The tab on the bottom is real thin so does that mean it is a 7.5.

 

the gear ratio may be under hte bolt head, but the actual ring gear daiameter is at amount the middle of the tag, hell, clean off all the mud and take a picture of it and ill tell you what axle it is and what gear ratio it has... also, is this for the '84 with 2.8? because if so chances are its a 7.5. from that picture (itd be easier to tell if it was a little smaller and could see the entire diff in one screen without having to scroll) it also looks like a 7.5.

http://www.therangerstation.com/tech_library/Axles.html