Orderd on friday hopfully wont have to wait too long to get installed. Orderd them from ron's very nice guy and good prices to us on the site.
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Orderd on friday hopfully wont have to wait too long to get installed. Orderd them from ron's very nice guy and good prices to us on the site.
what ratio are you currently? rons is the best!
3.73 stock, i figured 4.10 or 4.11 wouldn't be enough of a difference. my wheels and tires are really heavy and i really need a little more rpm on the highway to cruise 70-75 without a lot of down shifting. also in theory should be a little easier life(whats left of it lol!) on trans. and of course this decision had nothing to do with wanting to be able to roast the tires
:burnrub:
gears came in today, thanks ron. ordering tune tomarrow.
who is setting them up for u and when?
gonna make a nice difference..goodluck
a friend of mine who is a mechanic, who is great at setting up differentials. hopefully within the next two weeks.
gears went in tonight waiting on tune still, hopefully be here soon. so far feel great!
tune is already on the way.
just a side note, be careful at high speeds in 3rd and 4th, those gears will make that shaft spin very fast.
Sounds good hope u enjoy those gears. Plan on the same ratio was thinking of going with 4.10s but like u said not much difference from 3.73s
im thinking of getting 4:30's or even 4:56's soon i have a 33" tire would i have to worry about how fast mine spun as well. i dont take up as high anymore as i usto just food for though neways?Quote:
Originally Posted by farmtruc
you never know with driveshafts. i've seen stock ones break at 100mph with 3.42's and some live up to 140mph with 4.10's.
GM's driveshafts aren't meant to spin as fast as we make'm, hence speed limiter. Yes there are many out there going past the shafts critical speed, but you never know until you try it.
ya true... maybe ill have to look into a aftermarket one if it does?
i've used a lot of different companies and i haven't had one failure with http://www.driveshaftspecialist.com/
they made the one for my track truck and after they made zach's 5" (4.56gears w/ 6speed auto) with no vibe and no failure, that's proof enough for me.
What rpm are u at going 70?Quote:
Originally Posted by sloCaddy
Thanks for the warning, hopefully I won't reach the limit of driveshaft.
With the 3.73's I was turning about 2100rpm's
What about now with the 4.30sQuote:
Originally Posted by sloCaddy
Haven't had on the highway yet, and ill need to install retuned pcm for accurate mph.Quote:
Originally Posted by Green Machine
Let me now when u do thaxQuote:
Originally Posted by sloCaddy
Also my drivers side wheel speed sensor is leaking, could I just pull it out and use sealant? any other ideas besides replacing?
i think you would be around 2520rpm at 70mph with 28" tire 4.30 gears and about 2410rpm with 410s.Quote:
Originally Posted by Green Machine
According to gps I'm turning about 2400 at 70mph. my tach goes up in 500rpm increments. my tire diameter is 32''
got the pcm yesterday swapped it this morning, took about 10mins to swap, fired right up! thanks Allen.
soooo did u take it on the highway? get on it at all? what rpms you spinning? how does it feel?Quote:
Originally Posted by sloCaddy
Have someone film u from a roll to wot I wanna see how alive ur truck cam with those gears...Quote:
Originally Posted by 06Sierra2
its not a night and day difference, its an improvement. My truck came w/3.73's, im sure the guys that are swapping from 3.42's feel more of a gain. From a dead stop, It takes off better when you put it to the wood, driving around town feels the same, 70mph is 2,400 from 2,100. however, it will occasionally chirp second- but i also am ridin' dirty on the black ''16 spare. I make it beg for mercy all the time. Main thing is this truck doesn't make good power till 3,000rpm's a converter would complement these gears nicely. Maybe do a vid this afternoon
Hit up Circle D!!
What trans do u have?Quote:
Originally Posted by sloCaddy
Ya stall always helps
Stalls r fun I did my circle d this past March. I was having so much fun I for got about my stock g 80,and it went boom!Quote:
Originally Posted by Ls2Aero
its an 03- i'm not sure if its 4l60 or 4l65? anybody know how to tell diff? glove box code or on tranny? I just have one tire fire, no g-bomb here, and barely enough power to fry one tire let alone two.
Really no differene in trannys they r both weak. Do a 4 80 swap and don't look back. If u want to keep ur 4/60 do circle d 278mm stall if u tow. It will wake up that 5.3Quote:
Originally Posted by sloCaddy
i must be one of the lucky ones. i take mine to 130 all the time on 4.30's. the 2 piece driveshafts seem to be stronger from what ive seen though.Quote:
Originally Posted by farmtruc
converter locked with 4.30 gear and 305/45-18 tire puts me between 2400-2450 RPM. 7100 rpm puts me at 132 unlocked if anyone cares lol. i know my max mph unlocked was a question i couldnt get answered when i was trying to decide between 4.30 and 4.56.Quote:
Originally Posted by lechez71
oh ya, not really lucky, now you're talking two shorter shafts, which just increased the critical speed considerably.Quote:
Originally Posted by TXsilverado
for the long trucks out there, 2 piece is definitely the way to go for high speed.
That answers my question. Thank you Allen.
hate to thread jack but i have 05 gmc sierra cc z71 3.42's looking to tune it soon, what would the benifits of getting the circle d 278mm be or not much for me with those gearsQuote:
Originally Posted by Green Machine