What does HMD stand for in an HMD 4L80-E trans?
Topic pretty much sez it all. At first I was thinking Hydra-Matic but there is no D in that.....
Enthusiast
What does HMD stand for in an HMD 4L80-E trans?
What does HMD stand for in an HMD 4L80-E trans?
Topic pretty much sez it all. At first I was thinking Hydra-Matic but there is no D in that.....
Enthusiast
Hydra-matic Divison of General Motors?
Enthusiast
Hydramatic Drive, perhaps?
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
Enthusiast
Well Hydramatic is one word and the only thing that I found when searching was: hydraulic motor-driven transmission.
JP
Jeff
"But officer, I ain't Speedin', I'm just flyin' low"
2001 Silverado 3500 Dually LS Ext Cab, 6.6L Diesel, Banks Stinger Kit, 4" Exhaust, VR Straps, Bilstein shocks, 255/85/16 BFG KM2s
2004 Suburban 2500 LT 6.0L 4x4, Bilstein Shocks, Federico front/rear sway bars
1996 Caprice 5.7L LT1, B4U Suspension, KYB shocks & Hotchkis sway bars, BMR RCA - alas I miss ya.
2013 Caprice PPV 6.0L
Enthusiast
"Hydra" and "Matic" have been used both together as one word and as two words hyphenated. GM's current website uses the hyphenated version but no mention of HMD that I could find.
At one time I think H-M was an actual division of GM but now it falls under the GM Powertrain umbrella. Any tranny techs here that have some old memorabilia around?
stumo
Enthusiast
How about:
Hazardous Mated (to) Diesels?
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
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