Car wont shift 1-2 at WOT?

[CAMAROZ28AQUINO]

Hey guys car wont shift at wot until i back out of the throttle, just bounces off the rev limiter. Car has full exhaust cam, 3.73 gears and tci 3000 stall. what is wrong with the tune?

Copy of the tune is attached. thanks

[boilermaker2008]

i have the same prob right now in a 2007 silverado.. hits the rev limit everytime before shift.... shift is set at 5800.. and rev limit at 6500.. i have procharger ,cam , and fully built trans with 3000 stall

[CAMAROZ28AQUINO]

Im not sure what is causing this but im sure someone will help us out

[LSX378]

Im not sure what is causing this but im sure someone will help us out

One approach is to send your timing off a cliff at the rpm you want it to shift so that it sees a torque reduction.

There may be others, but this one has been proven to work.

[Russ K]

If your using stock dia rear tires, the tire/gear field should be 6.68. Also log the trans output revs.

Russ Kemp

[CAMAROZ28AQUINO]

If your using stock dia rear tires, the tire/gear field should be 6.68. Also log the trans output revs.

Russ Kemp

hey russ, the car has 275/40R18s all the way around. Ill log trans output revs tomorrow with your config

[Russ K]

Then with your 275/40/18 tires, use 6.95 in the tire/gear field.

Russ Kemp

[LSX378]

Then with your 275/40/18 tires, use 6.95 in the tire/gear field.

Russ Kemp

Do you mean 6.95 in the "Gear" (ratio) field, and leave the tires at 26.7" (275/40/18) for example?

Thanks!

[CAMAROZ28AQUINO]

Then with your 275/40/18 tires, use 6.95 in the tire/gear field.

Russ Kemp

Hey Russ, how did you calc 6.95?

I got 7.16 (26.7 / 3.33)?

Is this correct?

[05gto60]

are you sure its the tune and not that trans? sometimes they will bounce off the limiter if the trans is on the way out.

[CAMAROZ28AQUINO]

trans is mint man. car has like 30k miles and never raced it shifts perfect except for that i know the tune is out. But i do know that 4l60Es are crap and die easily but this ones still good.