These polyurethane bushings replace the low quality, factory installed bushings in the front differential. If there is a “clunking” sound coming from the front of your vehicle during acceleration, the bushing above the pinion (pinion bushing) is the probable cause. The rubber material that the factory used for these bushings is very soft with considerable air space in the bushings, and these bushings are under tremendous strain during vehicle acceleration. These three points lead to the early demise of the factory bushings.
Our replacement bushings are made using a polyurethane material that is stronger than the OEM rubber and the bushings are 100% filled (no air space) which minimizes deflection between the inner aluminum tube and outer housing. The use of our bushings will add minimal (if even noticeable) noise transmission to the cabin from the front differential.
We offer two different kits as well as two different durometers (hardnesses) for either a daily driver-street car or a full on race car/offroader. Our axle drop kit is for people that have lifted their Jeep by means of lowering the front axle. With that said, here is a breakdown of what we suggest a customer purchases dependent on the use of the vehicle-
***If you have an axle drop kit on your jeep, you need to select the kits labeled “axle drop”***
- Daily driver/occasional racing or off-roading (700hp or less)- We suggest the kit in black to 90% of our customers. This will keep the differential in place without transmitting too much noise or vibration.
- Race car/hardcore off-roading(unlimited HP)- We suggest the kit in red to about 10% of our customers. With our red bushings the differential will be held in place and have a hard time moving. With the full red set you might notice noise and vibration as the polyurethane is a lot stiffer than the factory bushings as well as our black bushings.