by Angie Quigley | Oct 11, 2020 | GM Technical Center
The Quigley GM vehicles utilize a front locking differential Independent Front Suspension (IFS). This 4×4 system is devoid of either manual lock-out hubs or automatic locking hubs. Instead, the differential electronically engages the front axle halves into the...
by higwebadmin | Oct 11, 2020 | GM Technical Center
What happens to your turning diameter once Quigley install your Independent Front Suspension (IFS) 4×4 system? Nothing, your turning diameter remains the same as the 2-wheel drive OEM GM vans. The diagram below shows you how a turning diameter is calculated and...
by higwebadmin | Oct 11, 2020 | GM Technical Center
NOTE: GCWR is defined as the Gross Combination Weight Rating, which is the total combined weight of the trailer and vehicle (with full fuel) including all passengers and vehicles. NOTE: The trailer tongue weight should be 10-15% of the total loaded trailer weight....
by higwebadmin | Oct 11, 2020 | GM Technical Center
Lubrication, Inspection and Routine Maintenance for GM 4×4 Vans Independent Front Suspension (IFS) 4×4 Systems There are four types of Quigley 4×4 systems used on GM Vans since 1974. Our current style is our 2nd generation Independent Front Suspension,...
by higwebadmin | Oct 11, 2020 | GM Technical Center
Engineered to meet your needs, our four-wheel-drive system’s design is the cornerstone of our business. We can offer you the value and performance of our proven O.E.M. four-wheel-drive system for new GMC / Chevrolet full-size vans. Some of the added benefits...
by Angie Quigley | Aug 13, 2020 | GM Technical Center
There are a few angles that are important to customers who use their 4x4s for off-road adventures. These angles are called approach, breakover, and departure. Such measurements can be of use if the vehicle is to be transported or used in rough terrain that involves...
