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Enhanced front (7.25" ring gear) and rear (8.5" ring gear) axles w/ 3.73:1 rear-axle ratio; Larger wheel and axle bearings; 31 x 10.50" BFG A/T Tires (Pickup), 31 x 10.50" BFG Longtrails (Blazer) 46mm gas pressurized Bilstein Monotube shocks; Rear track bar (Pickup), Rear anti-sway bar (Blazer) Skid plates; Fender flares
It also lifted the Blazer about three inches higher, allowing it to clear 31×10.5" tires on 15-inch wheels. Enhanced front (7.25" ring gear) and rear (8.5" ring gear) axles with a 3.73:1 rear-axle ratio, larger wheels and axle bearings, a stronger front anti-sway bar, skid plates, and Bilstein shocks were also added.
The GM AAM axle tubes exhibit a smaller diameter at the spindle compared to the AAM Dodge axles—measuring 4" for GM and 3.5" for Dodge from the housing. In design variation, newer GM trucks are aligned with Dodge axles. Additionally, GM incorporates a vibration damper on the yoke, while Dodge positions it on the drive shaft.
Naturally the cast housing is also unique to the IRS model. Standard 8.5" Dana 44 ring and pinion gear can be used in the IRS model through the use of an installation kit which includes special shouldered bolts to mount the standard ring gear to the IRS carrier and a special pinion bearing set to fit the standard pinion shaft to the IRS housing.
The 267 was introduced in 1979 for the GM F-body (Camaro), G-body (Chevrolet Monte Carlo, El Camino), A-body (Malibu Classic, 1979–1981) and also used on GM B-body cars (Impala and Caprice models). The 4.4 L; 267.8 cu in (4,389 cc) engine had the 350's crankshaft stroke of 3.48 in (88.4 mm) and the smallest bore of any small-block, 3.5 in (88 ...
The W72 Performance Package also included an upgrade to the rear differential ratio, setting the rear gear ratio to 3.23 for all 1977 and 1979 W72 Firebirds, with the exception being 3.42 for 4-speed equipped W72 Firebirds in 1978 only. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal.
The sport utility S-10 Blazer and S-15 Jimmy debuted for 1983; GM was the first to introduce the compact sport utility, followed by Ford and then Jeep the following year. Following the popularity of the Jeep Cherokee, 4-door SUV variants were introduced in March 1990 as 1991 models alongside the badge-engineered Oldsmobile Bravada.
The LQ1 (also called the Twin Dual Cam or TDC) was a 3.4 L (3,350 cc) DOHC V6 engine ("X-code") based on the aluminum-headed second generation of GM's 60° engine line, sharing a similar block with its pushrod cousins, the 3.1 L LH0 V6 and the then recently retired 2.8 L (2,837 cc) LB6 V6.