GM tagged posts

The upcoming 2015 Lexus NX200t is equipped with the first turbocharged engine within the whole Lexus history. This engine has the Toyota internal code name “8AR-FTS”.

The 8AR-FTS has an 2.0L displacement with an open-deck, midi-skirt type aluminum cylinder block. It also has a fully balanced forged steel crankshaft, cast-in iron cylinder liners.

On the Lexus NX200t, the turbocharged 8AR-FTS makes 235 hp at 5,600 rpm with 258 lb-ft of torque available from 1,650-4,000 rpm. On the paper this engine sounds just like a normal modern 4-cylinder turbo engine, which has similar performance (2...

Today GM released the 2015 Corvette’s option guide. Although there is no pricing yet, you can get a glance of how your Corvette can be optioned.

Note that the GM developed 8-speed transmission is available for all trims. For this new transmission we welcome you to take a look at our comprehensive technical review.

For your easy reading, we have compiled the option guide into one PDF file, which can be downloaded here.

Last time I showed you some interesting facts about the ZF 9HP transmission. Today I am going to talk about the latest GM 8L90 8-speed automatic transmission, which will be used on the 2015 Corvette.

Please do not be confused with the Cadillac CTS 3.6 V6 trim’s 8-speed transmission, that one is not the 8L90. Instead GM sourced it from Aisin and it is a completely different design.

First I would like to show you the structure diagram of the 8L90. The drawing is from the patent GM filed with the US Patent and Trademark Office several years ago. As expected in a patent document, the drawing looks terribly complicated...