Will 4.56 gears be to much??

[88Bronco2EB]

Ok I lifted my truck recently and I am now running 31s. I have stock 3.73 gears right now and I would like to re-gear it so running on the highway wont be a problem. It doesn't do to bad now, but I would like it to do better. I have an 88 B2 with the 2.9 and A4LD auto tranny. So my question is would 4.56 gears be to much, or should I go with 4.10s

I would really like to run 4.56 gears but not if it's going to raise the RPMs to much on the highway. So what do you guys think 4.56s or 4.10s????

Thanks

-Drew

[SR185]

What is it doing on the highway now?

What are the rpm's at 70mph?

[4x4junkie]

4.56 is just perfect for 31s. Do it.

[88Bronco2EB]

I haven't gotten it up to 70mph. I've been up to around 60mph. Its hard to tell exactly how fast I'm going because the speedo is off do to the larger tires. If I had to guess I'd say around 2,000rpms. With stock wheels and tires I was around 2,400rmps

[88_Eddie]

dont you still have the d28/7.5? you're gonna spend $300-$500 to regear that? unless you're not got beat it too hard (giggity) i'd go find an 8.8 and D35 for cheap and start saving to regear those. just my 2 cents, but if you do, let us know how it drives, i'm getting an 8.8/d35 soon and i wanna do 4.10's or 4.56's with my 31's

[88Bronco2EB]

Originally Posted by 4x4junkie

4.56 is just perfect for 31s. Do it.

That's what all my numbers I've been crunching tell me. I just wanted to make sure, that's a lot $$$ to spend to re-gear both axles. I just wanted to get it right!

BTW I love your B2!!! My goal is to have a more street-able version of your truck if that's possible. lol

[88Bronco2EB]

Originally Posted by 88_Eddie

dont you still have the d28/7.5? you're gonna spend $300-$500 to regear that? unless you're not got beat it too hard (giggity) i'd go find an 8.8 and D35 for cheap and start saving to regear those. just my 2 cents, but if you do, let us know how it drives, i'm getting an 8.8/d35 soon and i wanna do 4.10's or 4.56's with my 31's

Yeah I still have the D28 and 7.5, BUT I'm going to get a D35 and explorer 8.8 with disc brakes. I can get both axles together for $300 at the local JY. I just need more $$$$ lol

[93 4x4]

i just went from 373 to 456 on 33' tires it raised me 400 rpm's in 5th gear, threw my speedo off 10 miles an hour faster then what im doing,but glad I did it.

[BlackBII]

Do it.

[88_Eddie]

Originally Posted by 88Bronco2EB

Yeah I still have the D28 and 7.5, BUT I'm going to get a D35 and explorer 8.8 with disc brakes. I can get both axles together for $300 at the local JY. I just need more $$$$ lol

yeah i know what you mean, luckily i've found a guy on here that also lives in NC that is gonna give me a good deal on them. i'm not advocating you do this, just giving you a different angle to look at.

you're gonna spend at least $200 per axle to regear, so we'll say $400 to regear and it'll probably be more like $500 after you buy an install kit for each axle...... not to mention that's if you install the gears yourself. you'll have spent $500 and still have poop for axles. so take that $500 and buy your d35/8.8 and then you've got $200 saved to regear those.

BUT, you could always find some used d28/7.5 gears on here

[88Bronco2EB]

Originally Posted by 88_Eddie

yeah i know what you mean, luckily i've found a guy on here that also lives in NC that is gonna give me a good deal on them. i'm not advocating you do this, just giving you a different angle to look at.

you're gonna spend at least $200 per axle to regear, so we'll say $400 to regear and it'll probably be more like $500 after you buy an install kit for each axle...... not to mention that's if you install the gears yourself. you'll have spent $500 and still have poop for axles. so take that $500 and buy your d35/8.8 and then you've got $200 saved to regear those.

BUT, you could always find some used d28/7.5 gears on here

I'm Just gunna save and do it right! I know its a lot of $$$ but It will be worth it in the end.

[4x4junkie]

Originally Posted by 88Bronco2EB

That's what all my numbers I've been crunching tell me. I just wanted to make sure, that's a lot $$$ to spend to re-gear both axles. I just wanted to get it right!

BTW I love your B2!!! My goal is to have a more street-able version of your truck if that's possible. lol

Mine's actually very streetable. I s'pose you mean something with less lift and 31s though.

Was gonna have you take a look at Will's BII, his is pretty similar to mine but he runs 31s and a shorter lift (no bodylift), but I can't find a link to his truck page that isn't broken.


But yes, 4.56 gears no doubt. 4.10 isn't enough change to really make a difference. Your trans will be happier too.