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**Boog** · 10-14-2014, 08:34 PM

I've got an 06 GMC crew cab Z71 with the 5.3, auto od w/4.10 gears. It has about 140,000 miles on it. It's a real nice truck but it shifts kinda lazy so to speak. I've not been into one of these trans and haven't use a programmer before. My question is can the shift firmness and timing be altered by maybe a tech tool these days? Just thinking I might want to firm it up a bit possibly.

10-14-2014, 08:34 PM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,701	adjusting tranny shifts possible? I've got an 06 GMC crew cab Z71 with the 5.3, auto od w/4.10 gears. It has about 140,000 miles on it. It's a real nice truck but it shifts kinda lazy so to speak. I've not been into one of these trans and haven't use a programmer before. My question is can the shift firmness and timing be altered by maybe a tech tool these days? Just thinking I might want to firm it up a bit possibly. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross