i changed a 4.3L V6 to a 5.3L in a 99 silverado
now the problem is that i kept the same tranny and when a floor it it doesn't rev up high the highest it goes is 3 1/2.
i got a tune so it should do that but it does. so if anybody knows what might know whats the problem let me know.
sorry very unclear on what youre asking, i use the same 4.3L 4l60e tranny behind a 6.0 and besides rebuiding tranny and other issues it works fine, so youre saying with a tune it doesnt rev pass 3500 rpms? is the tune a custom street tune or mail order tune/ what kind of tune is it? is there any mods to the 5.3? is it stock ?
Simple: 408 on steroids!
single digits coming soon!
will it free rev to more than 3500 rpm in neutral?
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
it was a mail in order tune from a guy on ebay. and yes it will rev freely past 3500 on neutral but the problem is when im driving it shifts perfect but when i try to haul ass it wants to throw in the passing gear but it sounds like its slipping. also sometimes it just doesnt do anything at all its just like if im not on the gas and it shifts like if i was cruising. help plz
Last edited by rcsilverado99; 02-24-2008 at 01:22 PM.
so im gonna go ahead and say, your first problem was buying a tune from a guy on ebay...... i bet thats your problem.
THEY CALL ME G.
AZRAEL
2017 RZR 1000 2 SEATER
2023 RZR 1000 XP 4
2008 LTZ DURAMAX 3500
2023 300S 5.7
2023 BUICK ENCORE[/B]
The difference between winning and losing, is having a 2nd stage.
well i had to get the VATS disabled. but what about if i try the superchips to tune it?
If you're going to tune it, do it right and have Nelson tune it for you. I guarantee you will not be disappointed! It will save you a bunch of headaches!!
2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive
That suck you might be better off starting over with a new tune. Who knows what the guy did and how to undo it.
yea i tried the superchips tune but it didnt let tune it.
definately give allen nelson a call, it may solve all your problems...
Simple: 408 on steroids!
single digits coming soon!
Posting Permissions
Reply With Quote
