When did GM stop making the 440 T4 Transmission?
Around the 1990 model year, GM revised their transmission designation system and the 440-T4 became known as the 4T60 (4 forward speeds, T=transverse, 60=Series, based on relative torque capacity). Several improvements were made to the 440-T4/4T60 transmissions over the years before production ceased by the end of the 1993 model year.
What kind of transmission did the Pontiac Fiero have?
It was known as the 440-T4. It was hydraulically shifted and controlled, with the only electronically controlled component being the torque converter clutch solenoid – just like the 3-speed automatic (125-C) that was available for the Pontiac Fiero.
When did GM stop making the 4T60 transmission?
By the mid-1990s, the 4T60-E was the transmission of choice in nearly every front-wheel drive GM vehicle with the exception of compacts. A heavy-duty 4T60-E HD was produced only in 1996 for the supercharged GM 3800 engine. The 4T60-E was phased out in favor of the 4T65 beginning in 1997.
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.
Why does my Pontiac Bonneville shift so hard?
Pontiac Bonneville starts shifting hard from take off once driven for awhile or after driving at slow speeds. Any suggestions on the problem and how to fix it? I have to leave it in neutral and let it warm up Before it will Try to shift into gear Then it shifts hard going down the road.
Is there a problem with the solenoid on my Bonneville?
Computer reading shows problems with solenoid. I actually have 2-Pontiac Bonneville’s (’02 SSEI & ’03) that are experiencing the same problem. The 2002 SSEI has worse shifting problems than the 2003, however, they are both experiencing similar shifting problems. Nice cars but faulty shifting problems. I need to fix them….
By the mid-1990s, the 4T60-E was the transmission of choice in nearly every front-wheel drive GM vehicle with the exception of compacts. A heavy-duty 4T60-E HD was produced only in 1996 for the supercharged GM 3800 engine. The 4T60-E was phased out in favor of the 4T65 beginning in 1997.
When did the 4T65-E transmission come out?
The 4T65-E was introduced to replace the 4T60-E in 1997. The 4T65-E included a larger 258 mm torque converter for some models and many other changes to improve reliability. It is able to handle vehicles up to 6500 lb (2948 kg) GVWR with up to 280 ft·lbf (380 N·m) of torque. A number of final drive ratios are available, with many distinct models.