What do transmission gear ratios mean?
Gear ratios express how quickly the engine is turning compared to how quickly the transmission output is turning. Gear ratios can also describe the ratio between differentials, rear ends, tires, and other geared devices.
What kind of transmission did a Pontiac Bonneville have?
Bonneville models were standard equipped with Hydra-Matic (through 1964) or Turbo Hydra-Matic (1965-on) automatic transmissions. Options included power steering and power brakes as well as air conditioning.
What was the horsepower of a 1971 Pontiac Bonneville?
The standard engine for 1971-72 was a 455 cubic-inch V8 with two-barrel carburetor that was rated at 280 gross horsepower for 1971 and 185 net horsepower for 1972 and optionally available was the four-barrel version of the 455 rated at 325 gross horsepower in 1971 and 250 net horsepower in 1972.
What kind of carburetor does a Pontiac Bonneville use?
The 389 cubic inch plant was replaced with 400 cu in (6.6 L) one, and the 421 cubic inch plant was replaced with a 428 cu in (7.0 L) one. As per GM’s internal edict, the multi-carburation setups found on earlier cars were replaced with the new Quadra Jet “spread bore” carburetor.
When did the Pontiac Bonneville Brougham option come out?
Beginning in 1964, a Bonneville Brougham option package was available that included an even more luxurious interior trim level with front and rear seats featuring center armrests, upgraded door panels and a standard Cordova (vinyl) roof with “Brougham” nameplates.
What’s the final drive ratio of a GM 440 T4?
If you had this chain sprocket ratio and a 3.33 ratio differential, the overall final drive ratio of the transmission would be about 2.97:1. The 440-T4 was offered with the standard GM FWD bell housing bolt pattern, which means it would directly bolt up to both engines that were offered stock in the Fiero.
Is the 440 T4 Transmission compatible with the 4T60 transmission?
The 4T60-E ceased production after 1999 model year. As far as mounts are concerned, the same transmission mounts that will work with the 440-T4/4T60 transmissions should also work with the 4T60-E transmission. But the 4T60-E transmission is a little longer on the passenger’s side than the non-electronic 440-T4/4T60 transmission is.
What was the drive sprocket ratio on a 440 T4?
In addition, the 440-T4 could’ve had the following drive chain sprocket ratios: (drive/driven) 35/35 and 37/33. The drive chain attaches the input shaft to the rest of the transmission clutches, gears, and shafts, so a change in the chain sprocket ratio will impact all gears which will affect the overall final drive ratio.
How many gears does a GM 4T60 transmission have?
In the 4T60 family of transmissions, the combination of drive-chain sprocket ratios and the differential gear ratio together offer up to 12 different possible final drive ratios to allow the transmission family to cover various engine and vehicle applications.