Np203 advice

[burnhedge]

This is going to sound like a moronic post, but please bear with me.

I took a rusted out 74 blazer and turned it into a purpose vehicle for my firewood business. Hydraulic power unit in the "bed", brush pusher on the front, 3 point style log splitter on the back. Truck never leaves my farm, unless on a trailer. Probably doesn't see 50 miles a year.

Problem is 3:07 gears, not great for pushing brush, even in low. I know the 203 has some sort of internal diff that's active in the regular hi and low positions.
So I'm wondering if I could swap in a lower geared rear end without having to fool with the front. I realize I would have to keep it out of the Loc postions for sure. Would this work or am I a moron.

I was offered a dually 14 bolt 4:10 that has been welded, but it's not really worth it if I have to find a 4:10 front or pay to get the gears swapped. Thanks

Edit: full time case, no coversion kit.
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[Rusty Nail]

Nope. It wouldn't even make one tire
revolution before binding.

 

[burnhedge]

I figured it was a longshot. I saw a post somewhere about running different tire sizes front n back with a 203. Thought I might get lucky.

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[Rusty Nail]

3:07 isn't high enough to do anything with...that's too big a spread. 20-25% isn't happening.
Are you sure it's not worth changing the front?

 

[crazy4offroad]

Keep searching craigslist, you should be able to find a match pair. Otherwise you could pull the front driveshaft out till you can find a matched front. You just wont be able to leave it in "park", it will roll away because of the diff in the t-case.

 

[burnhedge]

I've been looking for a matched set for awhile, probably should have just started with a heavier built truck. I'm sure someone around here has a k20 rusting away out in the back 40, just have to find it.

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