Big Red & 350D rear end the same?

Grass Hog
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2017/03/08 18:56:37 (permalink)

Big Red & 350D rear end the same?

Started buying parts for my 300 build and found and bought a 350D complete rear end. While searching for parts I came across a 4x4 300 I couldn't pass up. It has a Big red rear end already under it. Wondering if I should sell the 350d rear end or is it better then the Big Red rear end? Same gearing? Strength? Any help would be great.

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    2017/03/08 20:57:24 (permalink)
    They are both tough since they was built in the 80s. My 350 rear end went through he!! and back with no problems but there are a lot of 250 rear ends the same. The 350 had bigger brakes (not important) and possibly a little bigger bearings but I would have to look that up to be sure. I think the axle was larger as well but again, not positive on that. Been quite a few years since I messed with them.

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    Grass Hog
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    Re: 2017/03/10 04:59:58 (permalink)
     Big Red around here are a 85 era ATC250ES 3 wheeler ( different parts of the country and world have the Big Red as a 4 wheeler , which rear end do you have ? --------  the ATC250ES  rear end can fit into a 300 , also the 85-87 TRX250A  fourtrax , the 85 has a swing arm that is welded to the axle tubes and requires extra work to make it work  , and the TRX350A or D will fit , a center shock mount has to be welded to the tube as the 350's had 2 shocks , the bearings are all the same on all 3 models , the diameter of the axle shafts are the same , but the axles have differences in length and placement of splines , as long as you use the tubes and axles as a matching set you are ok , the 350d brake panel doesn't accept the 300 brake cable and some mods have to be done there , the differentials of all three are the same and can interchange 
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