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700/241/D44/14BFF/37"tires: 4.88 or 5.13's?

az88k5

az88k5

1/2 ton status
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Prescott Valley, AZ
I am rebuilding some 3/4 ton axles to put into my 88 Blazer. I have a 350 SB with 700r4 and 241TC. I will be running a 37" tire.
I've read many posts about this subject and I hear a lot about the 5.13 with the 700r4 running 37"+ tires. This is not my daily driver, only recreational vehicle. Hunting, fishing, snowboarding, off-road and will see some highway driving to and from destinations mainly in state. Will see some trips to Utah and Colorado from AZ.

Currently on my Blazer I have 10bolts with 3.73's and 35 BFG AT's. It's okay, but not ideal. 4.88 or 5.13's? in my 3/4 ton D44 front and 14BFF running 37" tires with the 350/700r4/241? What do you guys think?
 
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5.13's for 37" tires.

I run 4.56's in my truck with 35" tires and it isn't enough in my opinion. I wish I had 4.88's with 35" tires.

I used to run 4.56's with 32" tires and it was SWEET. All the power you needed. 32's and 4.56's is comperable to 5.13's with 37's.

With 37" tires I will be wishing I had 5.13's.

Harley
 
If you're not gonna rock crawl it, I wouldn't even do 4.88, I'd put 4.56 and call it good. whats the 241 reduction? Isn't it damn close to 3:1...
 
FWP said:
If you're not gonna rock crawl it, I wouldn't even do 4.88, I'd put 4.56 and call it good. whats the 241 reduction? Isn't it damn close to 3:1...
Click to expand...
The 241 is 2.71:1
I am running a 700r4, 208 (2.61:1), 4.56's, and 37's. I would have liked to go 5.13's, but found axles already geared 4.56. I like it. I think it has enough power. It definitely has enough in 4 lo. Just remember, the lower the gear ratio, the higher the rpm's you will be spinning on the highway. You have od so thats ok. But 5.13's may kill your gas mileage in the city.
-Harrison
 
2.72

If you want to use OD with 37" tires you better have some deep gears. I can't hardly use OD with my truck unless I am above 65 MPH. If you are just going to run around the trails and back woods you could be ok with 4.56's but if you are going to pay for gears you might as well get all the gear you want/need.

If you don't plan on using OD much then a lesser gear like 4.88's or 4.56's makes sense.

Harley
 
You and your stone age "non-OD" tranny and stone age iron cases are better off then me and alot of the "poor men" with our aluminum and OD. I wish I was in the stone age. :D Someday I will digress back into the dark ages too.

Harley
 
85mudblazin said:
Another for 5.13's.
I am running 35's with 4.88's and wish I went with 5.13's. :)
Click to expand...

:thinking: Al right, I guess it is obvious the 5.13's is the way to go with a 700r4 w/OD. I looks like everyone that didn't' get the extra gearing wishes they did. Harley said it best, if you are going to pay for gears you might as well get all the gear you Want & Need. :saweet: Thanks for all the input.

Chris
az88k5
 
Just make sure you get a quality set of gears for at least the front end. The pinion gets kinda small with gears that low and can frag easier. Don't sweat it, just something to be aware of.
 
I was thinking superior gear and axles. What do you think of there products? Let me know, who would you go with for gears.

Chris
 
superior is high end stuff, should work great for ya. Personally, I'm gonna go with yukon gears in my rig... something else will almost always break before a 1-ton r&p.

j
 
4.88 or 5.13 ?

I run 4.88's in my 94 Sub with d44 & 14bb and 35" BFG's. I wish I had done the 4.56's. I constantly run out of gear at the top end/ freeway. I have a 383 in it,so I'm not lacking power. I cruise, in overdrive, at 2700-3000rpm. So for your 37's, if it were me, I'd do the 4.88s.
 
retroblazer said:
I run 4.88's in my 94 Sub with d44 & 14bb and 35" BFG's. I wish I had done the 4.56's. I constantly run out of gear at the top end/ freeway. I have a 383 in it,so I'm not lacking power. I cruise, in overdrive, at 2700-3000rpm. So for your 37's, if it were me, I'd do the 4.88s.
Click to expand...

What transmission are you running in the Sub w/4.88's/d44/14bff/35"s?
 
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Im telling you go with 5.13's, I have a GM crate 350 and its power band is just above what I cruise at highway speeds, at 65 I am turning about 2400 RPM's, and I would like to be in the 2600 range.
I am running yukon gears and they seemed to be of high quility. They were pretty easy to set up to.
 
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