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Offline davidpaul

Noisy rear axle/diff
« on: April 02, 2017, 09:53:10 AM »
As I had been waiting for a new drive shaft I thought I would have the diff out and have another look, so all stripped and cleaned I started experimenting with the shims.
I ended up with two shims on the pinion and none on the big gear wheel, which resulted in a very nice contact patch it's a little high on the tooth but both drive and over run patches look good, it turned out to be a bit of a trade off between contact patch and back lash.
The back lash is a little big but I can't detect and problems when driving.
Noise has been greatly reduced in both drive and overrun, when turning the diff by hand it no longer feels notchy as if the gears are bashing into each other, it's nice and smooth like it should be.

This might not be the same for everyone but it's worked for me and I'm very happy :D
2015 Zforce 800, Dr Pulley weights and sliders, Dobeck EJK, Innovate Motorsports AFR gauge,
Custom exhaust outlet, Ramair foam air filter, Led light bars, Modified air intake, CRD a-arm guards

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Offline NMKawierider

Re: Noisy rear axle/diff
« Reply #1 on: April 02, 2017, 10:17:20 AM »
Someday I will be doing mine as it has a lot of backlash and is noisy. Glad there is something that can be done.
2015 Z Force 800 (53") EPS -
Custom Air Intakes | Custom Exhaust Mod | SuperATV Harness | Custom Fenders | Custom Skid/Rock Sliders | 27" GBC Grim Reapers | Seizmik Mirrors |Конструктор (Rodin's) Doors | Dr Pulley Sliders | 1.5" Wheel Spacers | BENZ Silencer (as needed) | SATV Flip Windshield W\ Rear Shield | Dual Light Bars | Diamond Plate Storage | 9.7" GPS | Bandit Springs Rear & Gen-3 Shocks Front

My Videos On YouTube

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Offline gfmoto

Re: Noisy rear axle/diff
« Reply #2 on: April 02, 2017, 10:18:17 AM »
Can you post pics?
2015 ZForce 800EX
32" light bar
2-4" spots
Custom Cv guards
DIY 1/2 windshield
UNI air filter
DIY rear window
BOSS ATV 28. 450W speakers
Alpena Rock Lights (tough pods)
2" RZR Bracket lift
Roof extensions
27" Maxxis Corranado Tires
Alpena RGB rock lights
SuperATV Rocksliders
1/2 Doors w/custom paint and graphics

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Offline davidpaul

Re: Noisy rear axle/diff
« Reply #3 on: April 02, 2017, 10:36:14 AM »
No pictures this time but I have some from the first time I had the diff out, I removed all of the shims in the first picture and added a extra one in the second picture so I have two .60, I only had one extra pinion shim so further experimenting wasn't possible
At this stage I would say (within reason) correct gear mesh is more important than getting the backlash spot on, Regarding noise anyway ;)
2015 Zforce 800, Dr Pulley weights and sliders, Dobeck EJK, Innovate Motorsports AFR gauge,
Custom exhaust outlet, Ramair foam air filter, Led light bars, Modified air intake, CRD a-arm guards