Jump to content

AWDGM

Member
  • Posts

    120
  • Joined

  • Last visited

Everything posted by AWDGM

  1. LOL, yeah I know! After the tranny try to tape it on the block and listen for engine noises during the downshift!
  2. No output speed sensor on the 60/65 trannys, so slip cannot be detected. The 4L80 trannys have both input and output speed sensors, so do the Allisons. It is possible the clutches/bands slip during the hard downshift, maybe they are chattering and the KS are detecting that? Might be worth taping the microphone to the tranny and see if it picks up anything!
  3. If they did a filter change, then it's probably the O-ring that goes on the filter outlet and into the valve body. I bet you'll find it's cut or damaged.
  4. Gotcha! Pretty much the same other than the tcase and the front shaft is a little different. Helped a guy swap the NVG149 into an Avalanche that had the Autotrac case. Had another guy that was collecting parts to do the Autotrac case INTO a Sierra Denali. (wants to smoke his tires!!!) Little more difficult that way since there are computer interfaces involved with the Autotrac clutch, while the 149 is all mechanical. I'm doing a NVG149 swap into my wifes 04 Avalanche as soon as I can get the free time to do it. It is far superior to the Autotrac in wet and especially snow! Before I plow my driveway I usually play with the two trucks a little and the AWD is far better in the deep snow. Lots of fun though!
  5. We have a few lifted Sierra Denali's over on the Denali Truck forum Joe. Some say they get some vibration when lifting more than a couple of inches, then some don't have any problems going 3+ inches up. You mentioned Autotrac, but are you aware all 2002-2007 Sierra Denali's come with the NVG149 AWD tcase that came in the AWD SS's?
  6. The 2007 Seirra Denali will have the 6.2, 6 speed auto and AWD too. Hopefully Chevy will carry it over to the SS too! Benkey, it's still OBD2 to the best of my knowledge and is actually quite similar. Same tables and tuning parameters. It's the Canbus that makes them so different!
  7. Hate to say it, but probably not. The new trucks use a completly new smaller pcm and a whole new wiring system called Canbus. Untill someone comes up with a stand alone controller I think we're out of luck with this new tranny. You can't even get a signal from the ASDL connector on Canbus vehicles, so all our diagnostic tools won't even work! The Aeroforce won't work either, but a new canbus version will be out shortly!
  8. Most other countries use a system called RON or Research Octane Number to determine the octane rating of their gasoline, while stateside we use a system called AKI or Anti-Knock Index to determine gasoline's octane rating. Our own AKI system is actually derived from the average of the RON system and another more complicated system referred to as MON or Motor Octane Number. Multiply the foreign RON Octane rating by 0.95 and you will have the US AKI equivalent. 95 RON Octane x 0.95 = 90.25 AKI Octane (US measure)
  9. Sorry to backtrack, but Zippy is correct, the 2002 Yukon Denali uses exactly the same NVG149 AWD transfer case and drivetrain as the SS and Sierra Denali. In 2003, the Yukon Denali's and Caddys changed to an open center diff and use the ABS braking system to slow down the spinning wheel to give "kind of" AWD. It's not nearly as good as our 149 true AWD! Be glad you have an 02! A couple of guys have put blowers on the 2003 and up and have to shut off the ABS braking system to get it to go straight down the track. The ABS was overcompensating and making the truck lurch side to side! Butch 02 Sierra Denali
  10. Hey rdss, I have both the Superior Billet Super Servos, bought from Zippy, installed by Bill in Maine too! Bill and I got together at my house and he did them in my truck while I ported his throttle body in his truck! Shifts real firm, but the adaptive learn of the 4L65E smoothed the shifts out a bit after 100 miles or so. Anybody else notice that? Butch 02 Sierra Denali
×
×
  • Create New...