Are there any problems with the GM 8 speed transmission?

According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90 ” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows.

What are the symptoms of an automatic transmission problem?

1. Grinding or shaking sensation in gear. Your automatic transmission normally operates smoothly when shifting from gear to gear. You shouldn’t feel any grinding, slipping or shaking sensations as your car switches gears. When a transmission is starting to have problems, these symptoms can seem insignificant.

Is there a way to fix a Holden transmission problem?

The mechanic also told me a transmission control module program is available that might fix it, and I am chasing that now. Also, in relation to the clunky transmission, Holden has changed the recommended oil. INTERESTING reading. The VE V8 ute I am driving has the problem.

What kind of transmission does a Holden MY09 have?

This condition only affects MY8.5 and MY09 V8 with six-speed automatic transmissions”. The mechanic also told me a transmission control module program is available that might fix it, and I am chasing that now. Also, in relation to the clunky transmission, Holden has changed the recommended oil.

What should the RPM settings be on a LSX?

Keep in mind there is a slight delay at the shift point that will cause the engine to exceed these RPM settings. Ensure the VCM Editor>Edit>Engine>Fuel Control>Fuel Cutoff, DFCO>RPM Limits>P/N Cutoff RPM is roughly 500 RPM higher than these settings. We don’t want to hit the rev limiter during the WOT shift.

Is the GMC 6 speed transmission a reliable transmission?

In other words the transmission is reliable if you deal with the clunking. A family member has a 2011 GMC and the 6 speed acts the same and he has over 200,000 miles on it.

When did SAE stop using gross horsepower ratings?

The final straw was the passage of a California law requiring that new cars sold in that state advertise only the more conservative SAE net figures beginning with the 1972 model year. Faced with that reality, manufacturers decided it was time to abandon the gross rating system entirely.

When to shift to the next gear on the RPM gauge?

When you accelerate, shift to the next gear before your RPM gauge needle enters the red line area. If your carâ€™s engine is hesitating during acceleration, it should be inspected by a mechanic as this could be dangerous in situations like where acceleration may be necessary.

What causes high rpm at low speeds CHR?

Automatic transmission issues, high RPM at low speeds chr… Recently, I’ve been having transmission issue with my car. It is an automatic and shifting is very hard. It doesn’t seem to shift over second gear. It occasionally shifts into third gear within a mile of driving, but after that, it cannot shift over second gear.

What makes a car turn 2500 rpm or 3000 rpm?

Most of the wear damage is already done by whoever failed to change the oil regularly enough in those 10 years, or ran low on oil, or used the wrong oil viscosity, etc. Whether it turns 2500 RPM or 3000 RPM on the highway is largely irrelevant.

How to monitor RPMs to get the best performance?

When you need to slow down in a vehicle with a manual transmission, you can monitor the RPMs to determine when to smoothly downshift to a lower gear. Press the clutch in and rev the engine to the engine speed at which you would normally shift to a lower gear. Shift to the next lowest gear, then slowly let the clutch out to engage the gear.

Are there any problems with the GM 8 speed transmission?