Automatic Front Axle

[YoungMoneyVII]

The 91 has 308 ratio. I opened the glove box and found the 91 catalog, owners manual, maintenance schedule, warranty info, window sticker, and even unopened blazer information cassette tape. Go figured the one car I dont want to keep has everything I wish all my other GMs had. It came from beard chevy in MA for $24,000 and change

 

[Metrodps]

Collectors or guys who show a truck eat that stuff up. Should be able to get around $50 for the 91 catalog, owners manual, maintenance schedule, warranty info, and unopened blazer information cassette tape.

 

[YoungMoneyVII]

yea the catalog has seen better days the cover is rough like a old comic book but then again they only made 7000 91 blazers so I see all this stuff having some value. Im going to hold onto as long as the trucks in my possession

 

[Blue85]

I can't see swapping 3.08 axles onto something. If you had 3.08s, broke one axle and had a spare, that would be a good fix, but otherwise, why bother? I have tried to give away 3.08 axles with no takers. Even with stock-sized tires, a 3.42 will work out better. I would want 3.73 for 31's. The theory was that 3.08s gave better mileage with 29" tires, but even on tires that small, the 700 can hunt in and out of overdrive with 3.08s and I'd be surprised if 3.42 gave any less economy in real life. Now if you didn't have overdrive, those tall gears would pay off, but a 0.71 OD is no small thing.

The nice thing about 91 axles is the 30-spline shafts. Some people want the axleshafts, carriers and spider gears over the older 28-spline ones, so even if you send the housing for scrap, you might be able to sell those parts or hold onto them as spares.

 

[jekquistk5]

I can't give my 10 bolt stuff away. Well kinda I did give some of it to luke.

 

[Blue85]

I can't give my 10 bolt stuff away. Well kinda I did give some of it to luke.

What a sucker.

 

[Metrodps]

I can't see swapping 3.08 axles onto something. If you had 3.08s, broke one axle and had a spare, that would be a good fix, but otherwise, why bother? I have tried to give away 3.08 axles with no takers. Even with stock-sized tires, a 3.42 will work out better. I would want 3.73 for 31's. The theory was that 3.08s gave better mileage with 29" tires, but even on tires that small, the 700 can hunt in and out of overdrive with 3.08s and I'd be surprised if 3.42 gave any less economy in real life. Now if you didn't have overdrive, those tall gears would pay off, but a 0.71 OD is no small thing.

The nice thing about 91 axles is the 30-spline shafts. Some people want the axleshafts, carriers and spider gears over the older 28-spline ones, so even if you send the housing for scrap, you might be able to sell those parts or hold onto them as spares.

My 1987 Blazer with a 305 and 3:08 got 17mpg highway. The 1993 Blazer with a 350 and 3:42s got 15.6mpg highway. If you are using as a dd and do highway miles I feel the 3:08s are good. Off road they are a dog.