Hot!Rear Differential Seal for Honda 420

Page: < 12 Showing page 2 of 2
Author
doveman1
Super Swamper
  • Total Posts : 2634
  • Reward points: 0
  • Joined: 2008/06/11 09:51:16
  • Location: Marshall Texas
  • Status: offline
Re: Rear Differential Seal for Honda 420 2017/12/17 16:53:35 (permalink)
Grease has worked fine on trailer wheel bearings it’ll be fine in a rear diff. Use a good quality marine grease. I wouldn’t run to tractor supply and get their over priced junk. Lucas has a Marine grease that would work good.


As far as getting it in there cleanest way is to drill and tap the fill plug on the rear diff and screw a grease fitting in.

Green 2015 Grizzly 700
14in Sti Hd wheels, 29.5 OL2's 
2in HL lift
N2deep battery relocation
Wild boar radiator relocation
Atv trail tunes Kicker twin tubes
JBS extreme sheave with purple secondary spring


 If you're gonna be dumb you gotta be tough.
#31
00_NUTT
Moderator
  • Total Posts : 2670
  • Reward points: 0
  • Joined: 2014/02/11 10:12:30
  • Location: Oberlin, La
  • Status: offline
Re: Rear Differential Seal for Honda 420 2017/12/17 18:41:10 (permalink)
Ok take the filler cap and drill and tap it for a grease zert. I always put some 90 weight oil in then pump it then ride it them pump it and ride till the grease has pretty well filled all the viods. The 90 weight helps the grease sling a little better and in my opinion helps lube the upper pinion bearing.

00_NUTT
1997 Honda 300 4x4
Head Ported and Polished
317 Kit
Big Red Cam
Clutch Kit
SuperTrapp IDS2 Exhaust
K&N Filter
Carb Kit
32" Interco Interforce II's
16" MSA M30 Trottles
Snorkled 
54% gear reduction
Honda 350 rear axle assm.

6" BPC CUSTOM LIFT WITH 8" STRETCH AND 3" BODY LIFT OLD 300 LOOKING GOOD AS EVER THANKS TO WHITNEY!!!!!

SON'S BIKE
1998 Honda 300 2x4
6" BPC LIft with some sick a-arms
420 spindles and disk brakes
29.5" OL2'S
14" MSA M26 Vibes
 
Upcoming
4x4 Frame and Motor that's here now just got to get to work on the swap over!!!
54% Gear Reduction
 
#32
Jeepwm69
Mud Monster
  • Total Posts : 351
  • Reward points: 0
  • Joined: 2015/01/09 15:15:24
  • Status: offline
Re: Rear Differential Seal for Honda 420 2017/12/18 10:25:13 (permalink)
Grease supposedly works fine at lower speeds, but if you do anything over 30MPH on a regular basis your diff will definitely get hot.  Adding a little fluid with the grease would probably help.
 
I would look at swapping in a different diff.  I have read that the 2012-2013 tubed type Foreman rear end will bolt in.  That was from a reliable source, but I haven't done it myself. 
 
The 420 rear end is a POS.  It's just like the 300 and will not keep out water.  Best to replace it than to keep putting bandaids on a crap design over and over again. 
 
I've picked up 4 300's in the last couple of months.  All of them will be getting 350D/250A/250ES rear ends rather than mess with the crap stock 300 diffs.  Luckily I've been picking up those tubed style rear ends over the years and now I finally have machines to put them on.
#33
Page: < 12 Showing page 2 of 2
Jump to:
© 2018 APG vNext Commercial Version 5.5