Possible diff problem

[X]

Short of taking the diff apart and looking at it, is there any way to tell if the diff is bad?

thanks

Eric

 

[Crash]

hold one wheel and turn the other forward. should be smooth (off ground)

 

[Crash]

is it an x or 25

 

[X]

its a X SS

 

[Crash]

so inspection is pretty simple. most times its the pinion our the drive gear.

The thing to look for is a tight gear mesh, check for play side to side on drive gear and front to back on pinion.

The x has easy acess diff houseing.

I have been checking for play in my diffs every other tank lately trying to catch it before it tears up the gears.

my x After 1 gallon on new gears it needed two shimms on drive gear. Pinion was fine.

my 25 new parts the pinion needed three shimms.

 

[Double-O-Zilch]

I tore up the front diff and learned the expensive way to shim the diffs. The guys at the LHS said "most people complain of losing 2 teeth on the pinion, you only have 2 left". It's worth it in the long run and not that hard to remove, six screws if I'm right. http://www.hpiracing.com/index2.htm
scroll down for animation.

 

[Blazer X]

Put GST diffs in and forget about that problem.:nutshot:

 

[lifter37]

The best way I have found to shim the diffs properly is to take the bulkhead out. you can see how the ring and pinion mesh up much clearer. I use to tear up a lot of diffs. Even trying to shim them without taking the bulkhead out. If you are shimming and still tearing pinions up try pulling the bulkhead and you will see what I mean about how much better of a job you will get. I haven't tore one up since.
You can also check your diffs by grabbing both front wheels and roll the back wheels on the carpet and then try the opposite.