A few bits of information from my experience: 1. The final drive ratios can be tailored to each vehicle's performance requirements. Symptom: Shifting problems between gears. For example, with the transmission in an optimum ratio on a hill, the engine will not need to downshift or upshift unnecessarily. It's a simple, less complex design that enables the packaging of six gears in the space of a four-speed automatic. Fluid still had red tint when wiped with paper towel - even after 76,452 miles! But if the fluid smells burnt, this can indicate your transmission is failing. During a tap upshift, the voltage is dropped across a 1.
These codes may be accompanied by shift irregularities such as slipping, flares, harsh application, and bind-ups. The control module receives input that monitors brake pedal usage, vehicle acceleration rate, throttle position, and even whether a trailer is connected to the vehicle. The manufacturers are sure to expand the use of the 6T70 and 6T75 in the years to come. Luckily we had a bit more of a look around and found a small rubber plug over the back of the transmission where the speed drive would normally be located. Ground And Honed Gears To minimize gear noise, as well as vibration, the helical gears are ground and honed to ensure precise dimensional control. Driver Shift Control further reduces shift events by allowing the driver to select a desired gear for certain road conditions, such as steep and long hills, and automatic grade braking for descending hills. There are reports of this helping to cure the symptoms.
A properly working solenoid will usually return a reading somewhere between 20 — 30 ohms. The 6T70 is rated for engines up to 315 horsepower and 280 lb. Fluid change intervals are 100. The advantages of this layout translate to a shorter overall vehicle length, more interior room and lower powertrain height. You surely will not receive that benefit from a company that solely rebuilds transmissions. The shifter must be placed in the L position for tap shifts to function, from there, the customer simply presses the + or - buttons, located on the shifter, to force the shift figure 5. Supertech is licensed and approved.
I think there was some debate whether there was a dipstick on these transmissions. Is this something that someone can send a picture of it, or at least describe in detail where it is? Fluid leaks may point to worn seals. The Outlook and Acadia use buttons mounted on the shift lever to trigger a tap shift. Not synthetic, but I thought this was good enough to flush out the old fluid and who knows - I may just leave it in there. Possible cause: One of the issues include taking higher rpms, many times over 3000 rpms, to shift between gears 1 st and 2 nd gear, and 2 nd and 3 rd gear.
With the engine running and the selector in Park remove the plug and watch the oil to run out. An over-filled transmission will cause fluid to discharge out the vent tube, fluid foaming, or pump cavitation. To operate the paddle-type control, the customer pulls the switch toward him or her to force a downshift. Note: Ensure the transmission has enough fluid in it to start the vehicle safely without damaging the transmission. From what I can tell from the Helm manual, all 4 transmissions have a dipstick attached to the cap. Wait until the fluid drips out of fluid level plug hole.
In addition, it was used in. So taking a quick glaze over the engine bay there is no automatic transmission dipstick visible. Clutch-To-Clutch Shift Operation Three planetary gearsets are used with three stationary clutches and two rotating clutches, which save space compared to freewheeling designs. However, what I have yet to figure out is where the transmission pan is? One thing that looked strange to me: after hand-threading in and torquing to 12 N-m, the bolt head was still sticking out not flush with the transmission case. Enter your name: optional Enter the code below: This product hasn't received any reviews yet. The input gear set of the 6T45 uses five pinion gears, versus four pinions for the 6T40.
Installing Sonnax pressure switch rebuild kit 144510-09K restores normal switch operation, eliminating codes and providing renewed shift performance. Finally, the new six-speed automatic adds another level of adaptability. The valve is open below 60°C allowing fluid to flow around the valve body area. The G6 shifter has an M position and another gate for tap shifting. It is designed to be used in transversely mounted applications and is part of a family of transmissions that also includes the. An under-filled transmission will cause premature component wear or damage.
Connect the lead from your ohm meter to the two wires coming off the solenoid. From there, the customer can move the shifter toward the + or - gates to force a shift figure 4. Unit uses only one accumulator 4th, 5th, 6th. This is what is recommended. When the solenoids fails, it can usually be traced back to the coil of wire that makes up the electrical magnet. The wire has a tendency to either completely break or internally short out.
If you need to repair or replace your transmission, find the best option for your vehicle. The factory recommends that you re-program the computer up to three times in a row to get the problem to stop. Freewheeling mechanisms allow mechanical control between shifts, but also take up more space and add components to the transmission. You might also want to change the transmission fluid. The case of the 6T45 is slightly larger to accommodate the larger chain system and includes enhanced case ribbing for additional strength. This is the correct level when the transmission fluid temp is between 85°C — 95°C Tightening torque 11 Nm. This reduces the need for the driver to brake during a hill descent.