Gm 8l90

Update your browser to view this website correctly. Update my browser now. Gm 8l90 Escalades to Corvettes, the 8L90 transmission has been employed across a cornucopia of General Motors vehicles.

It is designed for use in longitudinal engine applications attached to the front-located engine [1] with a standard bell housing. It is a hydraulic hydramatic design sharing much with the 8L 90 transmission. Gear ratios used enable a wide 7. The 8L 90 is an eight-speed automatic transmission built by General Motors. It is designed for use in longitudinal engine applications either attached to the front-located engine [1] with a standard bell housing or in the rear of the car adjacent to the differential as in the Corvette. It is a hydraulic hydramatic design. GM also produces a similar design with the smaller 8L

Gm 8l90

Remember Me? What's New? Page 1 of 2 1 2 Last Jump to page: Results 1 to 20 of Thread: 8L90 Harsh Shift Fix? Thread Tools Show Printable Version. GMC Service Manager here. We have tons of complaints of a harsh shift from 1st to 2nd, as well as a delayed engagement when coming to stop, or partial stop seems like it doesn't know which gear to select? GM is aware of it, with no fix. Is this something we could tune out? Maybe its a delay in shifting that we could make quicker? Line pressure? I do notice that the shift quality is worse than all the other shifts.

Problem 3 - The Valve Body The hydraulic valve system that makes it all happen, the 8L90 transmission valve body is pillaged with internal crossleaks and low quality parts galore. As mentioned in another article I discovered that if you increase the gear ratio for the rear end it causes gm 8l90 to be more agressive and kick down way earlier. You should replace the filter and the fluid at the same time, gm 8l90.

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A judge has granted class action certification to a lawsuit involving 39 plaintiffs across 26 states that accuses General Motors of knowingly selling cars with faulty transmissions. On Monday, David Lawson, U. District judge for the Eastern District of Michigan, granted class certification in the case of Speerly v. GM, which represents the owners of various GM vehicles who have one of two models of eight-speed automatic transmissions — the GM 8L90 or 8L45 — made between and March 1, Car recalls: Ford, Honda vehicles among 1.

Gm 8l90

The 8L90E is an 8 speed automatic transmission developed by General Motors and introduced for the Model year. Structurally, the 8L90 is similar to the 8L45 , except that it is made to handle more power and torque. It is an incredibly advanced transmission and has the technology to perform at a high level in the Corvette, while at the same time being cost effective enough to use in high volume production. The addition of two extra gears over the previous generation 6L80 was necessary to meet ever tightening Federal fuel economy laws.

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This can damage the high pressure oil pump or flexplate, but most frequently the oil pump. Ballooning is a colloquial term used to describe excess pressure inside the converter causing it to try and expand, height wise. As with most transmissions, the factory input shaft can be quite fragile when exposed to extracurricular burden, either by cause of power, high vehicle weight or a combination of the two. This results in slippage, malformation of the friction disk, scoring, heat damage and more. The OEM input shaft is quite functional, there are no improvements to be made in terms of modifying how it operates. My is at a dealer waiting for a new transmission. So increase the amount of torque reduction during shifts in the region you want softened. It is a hydraulic hydramatic design sharing much with the 8L 90 transmission. Smokeshow, I have heard that apparently when you reset taps on a transmission if you clear all the shifts at once it will eventually learn back the same way or diverege the shifts. Automatic transmission family produced by General Motors. Our input shaft will capacitate extreme abuse for extended periods of time with virtually no yield, and is perfect for any demanding application. There have been so many tcm updates, the updated fluids, and faulty trans temp harnesses, but at the end of the day they just have a lot of quirks. However, the TCM always finds away around what you have done for some reason and goes back to its normal behavior of unnecessarily hard and very inconsistent shifting.

Eight-speed automatic transmissions have been around since , but General Motors was a little late to the party, due to development, manufacturing and other concerns. A year later, the 8L transmission series had spread out to the Corvette and trucks such as the Silverado and Yukon. Currently, GM offers two models of eight-speed transmissions, the light-duty 8L45 and heavy-duty 8L

This is why it only happens on the first shift of the day. Corvette C7 Z06 [10]. Most all the fluids are now synthetic. The flush will most likely fix it and gm knows this. If I make any progress I'll post back. It is designed for use in longitudinal engine applications attached to the front-located engine [1] with a standard bell housing. At 50 degrees and above it is at 0 but 41 degrees and below it is adding pressure. Article Talk. We have tons of complaints of a harsh shift from 1st to 2nd, as well as a delayed engagement when coming to stop, or partial stop seems like it doesn't know which gear to select? This input shaft is additionally challenged because in order to fit 8 different forward speeds in the 8L90 transmission, you need to manufacture multiple oil circuits into the input shaft itself to feed oil to these locations.