not downshifting

Reply Subscribe

Thread Tools

Search this Thread

Jul 8, 2007 | 07:29 PM

jays97 t/a

Thread Starter

Launching!

iTrader: (2)

Joined: Aug 2006

Posts: 276

Likes: 0

From: parkersburg,WV

not downshifting

whenever im going out 30mph and floor it it just seems to stay in the same gear and doesnt down shift.. the rpms just go up slowely... it shifts fine thought just regular driving anyone kno what might be the problem

Jul 8, 2007 | 08:12 PM

Gilbert@Ace Racing

FormerVendor

Joined: Oct 2006

Posts: 3,123

Likes: 3

From: D-F/W

Quote:

whenever im going out 30mph and floor it it just seems to stay in the same gear and doesnt down shift..

What is "it" and what mods have been done. What was done most recently and when?

g

Jul 8, 2007 | 09:11 PM

jays97 t/a

Thread Starter

Launching!

iTrader: (2)

Joined: Aug 2006

Posts: 276

Likes: 0

From: parkersburg,WV

when i floor the gas pedal... i only have pcm4less tune, exhaust and cai but that was all done last year.. my car has 114000 miles on it

Jul 8, 2007 | 09:24 PM

performabuilt

LS1Tech Sponsor

iTrader: (25)

Joined: Aug 2006

Posts: 10,854

Likes: 80

From: BLOOMSBURG PA

Did this just start recently then ?

__________________

Built..PerformaBuilt..Tough

Call 888-744-6542

Jul 8, 2007 | 10:36 PM

Gilbert@Ace Racing

FormerVendor

Joined: Oct 2006

Posts: 3,123

Likes: 3

From: D-F/W

Well not knowing what kind of transmission I am talking about.......... the 1st thing to know I suppose is what is your transmssions fluid condition? How old is the fluid / filter?

g

Jul 9, 2007 | 12:56 AM

RooRnZ28

10 Second Club

iTrader: (14)

Joined: Dec 2005

Posts: 1,392

Likes: 0

From: Central California

i had a similar problem and it ended up being my map sensor... describe it more.. so when you floor it above 30 it wont downshift? or below 30?

Jul 9, 2007 | 07:22 PM

jays97 t/a

Thread Starter

Launching!

iTrader: (2)

Joined: Aug 2006

Posts: 276

Likes: 0

From: parkersburg,WV

right around 20 to 40 mph.. from a stop it does fine and around 50 and up it does fine.. i was driving it today and it seemed to help if i put it in 3 instead of D.. if your driving around town at about 30 and about 1500 to 2000rpms shouldnt the rpms just up to 4500 to 5000 real quick when you floor it

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Jul 9, 2007 | 07:28 PM

BlackHawk T/A

TECH Addict

iTrader: (3)

Joined: Nov 2005

Posts: 2,869

Likes: 0

From: Lincoln, NE

What gears do you have...30mph is about the cutoff point...above that it shouldn't be downshifting. I think your car is normal.

Jul 9, 2007 | 07:39 PM

#10

Gilbert@Ace Racing

FormerVendor

Joined: Oct 2006

Posts: 3,123

Likes: 3

From: D-F/W

Thanks for the details.

How long have you had your mail order tune loaded?

Be sure to check the TPS or have it checked.

Are you giving it maximum 100% WOT and it still will not downshift? Sounds like it. It should initiate a 3/2 downshift, and it sounds like it is not. Have that solenoid inspected for proper operation. I have found over the years that the electro-mechanical part is a very likely culprit.

Also, can you feel the torque converter unlock at say over 45 MPH when you are accelerating form a steady cruise? Just curious....

g

Jul 9, 2007 | 09:32 PM

#11

jays97 t/a

Thread Starter

Launching!

iTrader: (2)

Joined: Aug 2006

Posts: 276

Likes: 0

From: parkersburg,WV

ive had my tune 4 about a year now

Jul 9, 2007 | 09:53 PM

#12

performabuilt

LS1Tech Sponsor

iTrader: (25)

Joined: Aug 2006

Posts: 10,854

Likes: 80

From: BLOOMSBURG PA

While it could be the tune if its been working ok for a year its not likley , I would look at the data signals from the TPS,MAF with a scanner and see if they are giving proper readings. You dont have to set a code for a sensor to be off , Codes only set if the sensor is out of its entire range

__________________

Built..PerformaBuilt..Tough

Call 888-744-6542

Jul 10, 2007 | 09:50 AM

#13

Gilbert@Ace Racing

FormerVendor

Joined: Oct 2006

Posts: 3,123

Likes: 3

From: D-F/W

I agree, not likely to be the tune.

Sounds like the 3/2 solenoid to me, it could be staying in lock up under moderate acceleration though..... get a scanner on it and watch what is happening!

g