GM 8.5" 30 Spline, Excalibur 5-760X, Nitro 4340 Front Axle Upgrade Kit
GM 8.5" 4340 Chromoly Nitro Front Axle Kit with Excalibur U-Joints
This kit includes upgraded 30 spline axles, 30 spline carrier required.
Nitro Excalibur joints are for competition use only and are not designed for street use.
Nitro 1541H steel and 4340 alloy & chromium and molybdenum alloy axles commonly known as "chromoly":
Our OE replacement axles are made of 1541H steel for a 25-35% increase in strength over their stock counterparts. Nitro 4340 chromoly axles are also heat treated but are designed with extra material for strength where it's needed. All of our axles are precision machined to OE specifications for excellent fitment.
1541H steel is a heat treated, carbon steel with .41% or less of other impurities. The heat treatments make the metal harder, with out making it brittle with a tensile strength of 181,000 psi. Up to 35% stronger than OE axles.
4340 cromoly steel, is a lower carbon steel with a minimum of 10% chromium by weight. Known as a high strength, low carbon steel with a tensile strength of 228,000 psi opposed to OE standard 1040 steel with a tensile strength of 110,000 to 130,000 psi.
That means they take more punishment, to get you further down the trail or off the trail entirely. That's Nitro Tough.
Nitro also offers extra long-splined shafts which can be cut to length and blank shafts for custom spline machining. Each new product is subjected to multi-point inspections and then actually installed and set up by Nitro's own in-house differential professionals to ensure excellent fitment and easy setup. At Nitro we strive to meet demands for new ratios and Fits and we are continually developing new products to stay ahead of the competition.
- CNC precision machining & heat treating processes ensure excellent fitment and overall strength.
- Our heat treatment is applied after the splines are cut which allows for deeper penetration where strength is needed.
- We have a rapid and ever growing range of products to meet new demands and Fits.
Please contact us with your specific questions and inquiries.
- 4340 Chromoly Steel
- Nitro Excalibur U-joints
Differential: GM 8.5" Front
Axle Splines: 30
U-joint: 760X Excalibur
Material: 4340 Chromoly Steel
Manufacturer: Nitro Gear & Axle
1979-87 1/2 Ton Chevy/GMC Truck
*All Nitro Gear & Axle brand products are warrantied to be free of manufacturer defects for the specified period. Warranty requests must be made by the original purchaser and submitted by the dealer purchased from. Any parts sent for warranty consideration must be pre-approved and shipped prepaid freight to our facility with copy of RGA for our inspection & determination. We will not pay for labor, shipping cost, loss of revenue or perishable goods, commercial losses, costs of telephone calls, shipping or general inconvenience. This is our only warranty expressed or implied. Unauthorized warranty returns may be refused. Warranty generally covers MFG defects in material or workmanship. Abuse, overloading, improper lubrication, misuse, commercial or competition use voids warranty. Normal characteristics are not warrantable, such as Gear whine. Minor cosmetic flaws, dings, burrs from shipping or manufacturing, are not considered defect, it is installer responsibility to address these at time of install. Customer is responsible for shipping charges if warranty is granted. Warranty is for the original purchaser/user, is not transferable. Warranty covers one replacement or credit solely at our discretion. Warranty determinations are at our sole discretion.
In addition to the above conditions, see special notes for these products:
Ring & Pinion - Warrantied against manufacturing defects. 2 years from date of purchase. Must provide set-up specs.
Chromoly front Axles, Excalibur Joints, 30/30 Birfield kits - Warrantied against manufacturing defects for the life of the vehicle. These products are also covered for Breakage. The Shaft / joint must be BROKEN. Wear, twisting, bending are not warrantable. Damages caused by failure of other parts are not warrantable, for example broken U-joint (other than Nitro Excalibur) causing damage to Axle ears.
Rear Chromoly Axles - Warrantied against manufacturing defects for 5 years. These products are also covered for Breakage. The Shaft must be BROKEN. Worn, twisted, or bent axles are not warrantable.
This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
Box Weight: 40 lb
Box Dimensions: 1 x 1 x 1 in