General Motors 8l90 Overhaul Part One: Disassembly

Подписаться 33 тыс.

Просмотров 13 тыс.

50% 1

This video is part two of a three part series on the overhaul of the GM 8L90 transmission. In this video, I cover the disassembly of the transmission and what to look out for.
Here are the other videos in this series:
8L90 Overhaul - part two covers assembly, including clutch and gearset assembly and measurements: • General Motors 8l90 Ov...
8L90 Overhaul - part three covers valve body: • General Motors 8L90 me...
8L90 Hydraulics theory and operation: • General Motors 8L90 hy...
8L90 Electrical theory and operation: • General Motors 8L90 el...
8L90 Torque Converter: • General Motors 8L90 to...
8L90 Rebuilding Particulars:
8L90 Modifications and Tuning:
Special thanks to Precision International, TransGo, and Sonnax for providing me with product to use in these videos. Also thanks to KB Cores and AA Midwest for providing me with a few 8L90 cores at a good price!

Опубликовано:

30 сен 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 15

@keithpardini9065 Год назад

Good stuff! The instructor is very knowledgeable and inspires confidence.

@VanTheSheepDog Год назад

I would love to see you all do a tear down and rebuild of 10L90 GM next!

@maxnjax7294 4 месяца назад

please Mr cameraman focus ởn the parts that teacher discussing

@cmitchell17a1 2 года назад

Have you ever heard of unnecessarily hard 3-4 shifts on these 8L90s? It only occurs at low-medium throttle at around 2000-3500 rpm 3-4 shifts only. The 3-4 shift is way faster than it needs to be and all the other shifts seem normal. You can use GDS to learn the oncoming clutch for it and/or reset the whole thing and let it relearn which seems to help it until it learns back in few hundred miles. You can also lower the shift times with HP Tuners but it is no help it ignores it. So it appears to be controller related but then seems like it could be mechanical/hydraulic. The 3-4 shift isn't excessively hard but completely inconsistent with all the other shifts and you can see it on a log as well.

@siuautomotive 2 года назад

It'd likely be the 45678R (aka C5 clutch). Probably the solenoid, clutch reg valve or solenoid accumulator worn. Since you say that relearning it will help, but then it will eventually go back to being harsh, I'd have to believe it's a solenoid, valve, or hyd leak. These only adapt when they get hot, so if it adapts to a fluid leak after the fluid is hot (thin fluid, greater leaks), when it cools off and it doesn't leak as much, the shifts will be hard. Watch the VB video (OH part three). If you don't have a vacuum tester, I have a video up on how you can make one for a little over 100 bucks. It's good to know if you're dealing with a worn out valve body or if it's likely a solenoid. The solenoid is harder to test, since there's no good way to bench test it accurately.

@sarwarkamal4315 Месяц назад

good job thank you

@corycunningham4336 7 месяцев назад

8l90 is the worst transmission I have personally ever owned would never touch another vehicle with one in it

@douglash3129 9 месяцев назад

Is the 8L45 similar to this transmission ? Also , is it common for that pump drive gear to break? Good channel thanks!

@Dusty_Bottoms_ Год назад

I looking to buy discontinued solenoid 24272278, any idea where I can buy one? New or used, I broke the connector on mine, anyone sell used parts? Your help is greatly appreciated! Thank you!