The Nitro Helical Worm Gear is a torque-sensitive mechanical limited-slip differential that uses worm gears and spur gears to dispense and distinguish input power between two drive wheels or front and back axles.
This is a completely separate design from the common beveled spider gear designs seen in most of the automotive industry.
Just like any LSD, the Nitro Helical Worm Gear functions as a standard or open differential under normal driving conditions, allowing one wheel to spin faster or slower as necessary.
When a wheel experiences a loss of traction, the gear separation forces start to take effect and distributes the torque to the high-traction wheel by increasing the helical-shaped gears mesh force until wheel spin is reduced or entirely stopped. Once the vehicle exits the low traction condition, the differential resumes normal operation.
What's nice about the operation of a Nitro Helical Worm Gear LSD, is its characteristics; smooth, quiet and automatic. This LSD will engage without any driver awareness or require any action. It also has no wearable components and requires no maintenance, producing less time on the rack and more on the road.
- Differential: GM 9.5 Inch
- Gear Ratio: 2.73 and Up
- Axle Splines: 33
- Ring Gear Bolts: 12 (not included)
- Manufacturer: Nitro Gear and Axle
- Warranty: 1 Year
California Residents:
WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
- BrandNitro Gear And Axle
- Pinion Spline Count33 Spine
- Country of OriginUSA
- Manufacturer Warranty1 Year
- Sold AsEach
- Fitment
- Fitment TypeVehicle Specific
Year | Make | Model |
---|---|---|
1981 | GMC | K2500 |
1982 | GMC | K2500 |
1983 | GMC | K2500 |
1984 | GMC | K2500 |
1985 | GMC | K2500 |
1986 | GMC | K2500 |
Free shipping on orders $75 or more. Same day shipping for in stock items ordered prior to 2 PM CST.
Flat rate shipping of $9.99 on orders under $75.
Free shipping and flat rate shipping is available to the continental United States only. Shipping to Canada, Hawaii, Alaska, and US territories is available at additional shipping charges. Please contact us to receive a quote to these territories.
Returns are accepted on saleable, unopened, and unused products within 30 days of purchase. Starting a return is quick and easy at FS Parts.
Step 1: Request a Return From Your Online Account
Login to your account and click on your order under Orders. Click the Return button for the order that you wish to return.
Step 2: Select Return Reason and Submit Return
Choose the return reason from the drop down and enter in return comments. Click Submit Return.
Step 3: Ship the Item Back
Print out the submitted return request and place in inside the shipping box.
Purchase a shipping label from the carrier of your choosing and return the package to the following address:
FS Parts Returns
2505 E Wood St.
Paris, TN 38242
Returns must be shipped within 14 days of submitting the return request. Returns received after that timeframe may be denied at our discretion. Return shipping is the responsibility of the customer.
Step 4: Receive Your Refund or Exchange
After we receive the return, we will inspect the items and process the refund or exchange after it has passed inspection to ensure that the items are saleable, unopened, and unused. The refund will be issued back to the original payment method within 3 business days after the return has been received.
Restocking Fees
All returns are subject to a 20% restocking fee. Restocking fees are waived if a mistake was made by FS Parts or the item arrived defective.
Products Not Eligible For Return / Exchange
- Products that have been installed
- Products that have been modified or altered
- Products that shipped via LTL Freight
- Products where the manufacturer packaging has been torn or written on
- Custom / special order products including custom patterned and painted items
In the event that a product returned that is not eligible due to the above reasons, the return will be denied. The item may be sent back at the customers request with a customer provided shipping label.