[rednyforeman500]

As an intro, I have changed and rebuilt lots of fourtrax 300 and a couple foreman 500 rear ends, but this will be my first foreman 450 rear end rebuild. The bike in questions is a 2001 foreman 450 4x4 ES. I have not looked at the bike in person yet, as it is still at my buddies house. I know I will need a rear axle, ring gear and bearings.

The question is when I look up the ring gear for the 01 is says it only comes as a set with the pinon gear https://www.partzilla.com/catalog/honda/atv/2001/trx450es-a-fourtrax-foreman-es/final-driven-gear. Now if you look up a 03 it says you can buy the ring gear separately.https://www.partzilla.com/catalog/honda/atv/2003/trx450fe-a-fourtrax-foreman-es/final-driven-gear

Are there really differences between the foreman 450 rear differential between 98-2004? I know a 03 brand new complete rear differential is $311 and the 01 is $412. At the cheaper price I may just save time and replace with new oem.

Thanks in advance

 

[Jeepwm69]

They're more than likely the same. Look at the tooth count and case halves and see if any of the parts interchange.

An 05-11 Foreman 500 or 01-14 Rubicon diff should be the same was well.

 

[LBZ_Duramax]

If It needs gears I would just get the complete replacement. By the time you buy bearings/gears and your labor time you would be money ahead. Ring and pinion should always be replaced as a set.

 

[fishfiles]

When this thread started I was interested as I have both the 2000 and the 2002 outside and some extra parts for 99-2002 , I don't know why they have different part numbers on some of the individual parts of the rear diff , have found in the past different part number don't always mean the part is different , the ring and pinions are different number for what it is worth , might be as simple as different suppliers of the parts

 

[LBZ_Duramax]

The rear ends from a 400-450 all years will interchange.