All 15 Automatic Transmissions (Powerglide to 10L90)

Brother can you do one on GM manual transmissions please ? They are iconic too man 😬🫣

The 200r4 was never in the corvette. The th350 with a lock up converter was used in 81. The 4L85E also had straight cut planetary gears for strength.

This is the series that my nerdy GM self has always wanted and needed. Thank you 🙏🏻

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Turbo-Hydramatic 425 (TH425 or THM 425,[1] later 325) was an automatic transmission developed and produced by General Motors. The THM425 was a derivative of the THM400; most parts directly interchange and some others will interchange with minor modifications. The internal parts spin the opposite direction in the THM425; the helical angle of the planetary gears is "reversed" and the one-way clutches freewheel in the opposite direction, for example. The THM425 was developed for the 1966 Oldsmobile Toronado and the 1967 Cadillac Eldorado.

Powerglide was phased out by 1974. I had one in a 1973 Nova, and I really liked that transmission.

I’m new to the world of Chevrolet stuff, I really love the content. It’s so informative and easy to understand. Thank you for the amazing content.

i am a retired professional transmission rebuilder for 45 years. the 2004R was never in a corvette. they had a multi case bolt pattern and can be bolted to any GM v8 block. they were one of my favorites. i have one today in my 86 monte carlo SS,,,,,,,,,,,,,,,,,,,,,

I had a 1993 Silverado with a 5.7 and 4L60E. The original trans lasted until 118,000 miles and lost 2nd gear, so i had it overhauled. That build lasted until 258,000 miles. Then it developed the notorious 1st to 2nd slam shift due to a worn check ball passage. I sold the trans to a Jeep builder at that point because the truck had bad salt cancer.

Awesome video! The knowledge you’ve tracked down and shared with us is worth a like and subscribe!

Thanks for uploading with info on the 4L60-E. Previous video didn’t mention it

1:21 Chevy had one in the corvairs that you could push start, which is pretty unique for a auto.

loved the flow chart

Thank you for this detail. I have been looking for this content for a long time.

I'm perfectly happy with the TH400 in my '88 Chevy G30 work van. Bought it '94 as a former GTE fleet vehicle with 85,000 on the OD. The odometer broke at 93,000 so I decided to wait until the speedo cratered to replace the unit. That hasn't happened yet so think the original 5.7 and TH400 has around 300,000 of use with no breakdowns.

The ONLY reason the OEM's spent the million to develop 8- and 10-speeds was to meet emissions and mileage rules - keep the engine in as narrow an rpm band as possible, then tune it to meet the regs. So the EPA drove up the cost of vehicles, PLUS the cost of repairs (go price a 10-speed rebuild). Compare that to the amount of fuel saved and reduced emissions, both of which are so small as to be insignificant.

My 1955 Chevrolet 3600 had the Hydramatic 4 sp. ORIGINAL. 1st gear was what I would call a Granny .......in the owners manual it listed at full throttle it came out of 1st at between 5-7 mph. !

I had a "cast iron" case PowerGlide in a 57 Chevy with a 61 spec 283 FI. The only good advantage was the Iron case Powerglide, the bands could be adjusted externally without pulling the pan.

Also the THM350B, which at least Buick used in mid-sized cars with smallblock V8' from '71 to '73. Essentially a heavy duty THM350 with extra clutches. Then there was the TH350 with a lockup converter... Then the THM400 'Switch-Pitch", has a converter with 2 different stall speeds.

you have RWD labeled as Transverse... you have the descriptions backwards. Transverse is FWD and Longitudinal is RWD