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View Full Version : Looking for 250sx differential final drive gears



MulletMan420
03-15-2018, 08:01 PM
So while replacing the swing arm bearings on my 86 250sx. I noticed some slop in the differential. I tore it down to flush out all the old nasty fluid, and really discovered the slop. So, when i aquired this SX, i was about 16. The rear diff was in pieces and i had to rebuild it. Ive always noticed shaving in my fluid, so im guessing my gears were worn initially and i never really noticed. Being 20 and working at a machine shop now, i know what to look for, and have alot more help. The bottom of my pinion shaft is worn out, and sloppy in the needle bearing, which wore out the pinion bearing prematurely and caused more damage to my gears. So, long story short, new gears and a new bearing kit are in order. Any help locating new gears, or possibly a differential in good shape would be appreciated! Thanks guys

sweetip2000
03-16-2018, 12:44 PM
Probably best to ask around the message board for someone who is parting out a 250SX diffy. I bought a 250sx years ago in a town called Silver Lake NY that was very close to the St. Lawrence River near Canada. Are you near there ? Hope you find your parts.

MulletMan420
03-16-2018, 04:34 PM
Yes, i live right on the St Lawrence. I can see Canada from my front yard

MulletMan420
03-25-2018, 06:50 AM
Still looking if anybody can help!

MulletMan420
03-25-2018, 07:47 AM
I was able to locate a ring and pinion gear set that will fit a TRX300FW. Does anybody have any infomation if these are the right dimensions for my differential cases? And if so, is there any difference in the gearing ratio? Thanks for any help! https://www.ebay.com/itm/Honda-TRX300FW-Fourtrax-Rear-Differential-Ring-Pinion-Gear-Bearing-1988-2000/251857806337?_trkparms=aid%3D111001%26algo%3DREC.S EED%26ao%3D1%26asc%3D20160908105057%26meid%3Da8715 c8095a8410eaaa884c6a5e265d9%26pid%3D100675%26rk%3D 1%26rkt%3D12%26mehot%3Dpp%26sd%3D253292919008%26it m%3D251857806337&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3A5eb5d934-3021-11e8-bbb4-74dbd1808e4e%7Cparentrq%3A5cf60bd41620aa146b5efc59 fffe1957%7Ciid%3A1