Rebuild the rear differential

[Twilight]

My 250sx ran for 3 days, then today I went to drive it off the trailer and the drive shaft just spins and spins... sucks, but I figured with any project trike it needed to be done.

Manual says I take off the rear wheel, slide the axle out and then unbolt it.. lets hope its that easy! Are the gears still available? If not, anyone have extras, haha.

Atleast the 350x and the 250sx made the trip and ice fishing easier and fun!

[honda250sx]

You will need some special honda tools to do this job. Its not for the faint of heart.

I purchased the tools from a dealer that was going under. I wish I had a picture of them.

Good luck

[oscarmayer]

or he coudl send you his rear end and you fix it since you got the tools for a decently cheap price. help a bro out mans!

[Twilight]

What kind of tools are they?

[oscarmayer]

super secrete squirel tools
he coudl tell ya, but then he has to kill ya.

[Twilight]

Ohhh la la... So vice grips and a BFM is in order... hehe

[oscarmayer]

hahaha that's funny right there!

[Twilight]

In all seriousness, I have been to so many mechanics that have the special tools being vicegrips and a blunt object.

I sure dont do it

[Twilight]

Okay, before I tackle it tomorrow I need to know.

When in neutral, the drive shaft moves when the wheels move, when i pop it into first gear it doesnt move. Would this be a gear or bearing? In the 5th gear it makes a bad noise.

[ScottZJ]

I made my own tool out of a pipe and large nut. I just welded them on and it worked great. I just took the diff to the hardware store and found a nut that would fit it perfect.

here is the nut you have to get out of the top part of the diff


Here is the part I made




here it is all tore apart

[oscarmayer]

if youy can turn the wheels and the shaft turns, then it's not the differential. it's a good chance it's in the transfer case if where at that point I would start.

[Twilight]

Okay, I took the damn rubber boot off so I can see whats going on, this is what I can see.

Neutral, if I turn the rear wheels, the shaft turns. The trike will try and go forward.
1st gear, shaft turns wheel doesnt
2nd,3rd,4th... same
5th gear, shaft turns, differential makes a horrid noise, wheels dont move.

[honda250sx]

Scott thats a quick fix! What size nut for the rest of the DIY??? Nice job.

[oscarmayer]

welp, maybe the rear diff is bad then. does the driveshaft have a yoke between it and the rear diff or is there jsut a spline? (i forget on those years)

yea u may be lookin for a new rear diff. i seen them on ebay for liek $150-$200 working perfectly. may be easier to just by a working unit. then repair that one and save for later.

[honda250sx]

There is a u-joint in there.