New Gears.... now what???
I posted another thread on swapping my 3.23 gears for 4.10 on my RWD 2005 GMC Sierra 1500 with the 5.3L and 4 speed auto (4L60e). I took the truck in this morning and picked it up about 2 hours ago...
Forum Discussion
I do a whole lot better with positive feedback so your input is appreciated.
I read a post from a guy with the same deal and he went with the Hyper Tech tune because their advertising said it would take care of the problem. After he got it, the tune didn't do what they advertised and after talking to a tech guy, the tech guy told him that feature never worked but they still push it.
He did get if fixed with the Diablo tune but wasn't happy with the performance part of it but it did take care of the speedo mismatch. I'm going to make some calls tomorrow to see if there's something that can take care of the speed sensor error AND give me the Economy, Performance, Towing tune options I want.
My truck is rear wheel drive. I read that the rear speed sensor runs off of drive shaft rotation so with the new gears, the drive shaft is turning faster. I'll get it all figured out. ;)
I read a post from a guy with the same deal and he went with the Hyper Tech tune because their advertising said it would take care of the problem. After he got it, the tune didn't do what they advertised and after talking to a tech guy, the tech guy told him that feature never worked but they still push it.
He did get if fixed with the Diablo tune but wasn't happy with the performance part of it but it did take care of the speedo mismatch. I'm going to make some calls tomorrow to see if there's something that can take care of the speed sensor error AND give me the Economy, Performance, Towing tune options I want.
My truck is rear wheel drive. I read that the rear speed sensor runs off of drive shaft rotation so with the new gears, the drive shaft is turning faster. I'll get it all figured out. ;)
jrhanbar98 wrote:
I'll throw some positive vibes for yah. I had a 4 sp 03 Avalanche with a 5.3. Went from a 3.73 to 4.10. I can tell you it definately helped pull our RV. Took cruising RPM @65 mph from 2.9-3k to around 3.3k. This was more inline with the 5.3 power band. Helped on launch with camper allowing me to get up to speed a little quicker. In the hills it helped me stay in 3rd and did not have as many down shifts th 2nd gear. If you have a 6 speed I would think the results would be even better. More gears to play with in the hills and flats.
To correct the speedo I bought a Diablo tuner. Allowed me to reprogram for the speedo and I was able to get a basic trans and engine tune. Didn't care so much about engine, but really want a tow tune that would quicken the shift points and hold 1st & 2nd longer so I could get up to speed more efficiently. Only drawback was the MPG.
One last thing if your computer shows different speeds front and rear, this implies you have 4wd, if so you need/should have replaced gears in both axels, I did on mine.
