When racing the engine runs up to 3200 RPM's and then hangs there for a couple seconds before it shifts into the next gear. Is there a way to make the transmission shift instantly?

 

a valve body will help lots.

 

Probably someone out there makes a shift kit for a 48RE,little higher pressure pump and modify your valve body.Or I've read on here that some of these programmers can raise or lower your shift points.

The torque will get you going and when the TQ curve starts going down that is where the HP takes over.I always set my autos to shift at a little before max TQ was reached,that way you are pulling all the time.I'm still bone stock right now,but when I build my engine up it will upshift at 3000 rpms in the lowers gears and 3rd will go to max.

If I get a higher revving profile cam then of course the shift points will increase to what ever the max rpms will be.

Sorry,hard for me to say in type,but this is the main idea.I don't care what anyone says.When you reach your peak TQ rpms your pulling power starts to drop,that is why on all the dyno charts you see that the peak HP is reached at a higher rpm than the TQ.Makes no difference if you are turning 3300 or 4000,if you have the cam lift and duration it will be the same.Timing has a lot of input also,that is where the ecu programmers come into play.

 

Just go get a good built TRANs, Or have yours done thats what i did NO LAG!
check out the posts had have fun

 

Are you still stock?

 

A good programmer...ie Smarty.

 

Mildly modified, Juice/Attitude stacked with a XZT stack program. Have only run the juice on level 2 sublevel 5. Trying to keep the transmission bills at bay for awhile yet.

 

The problem is that you're slipping. The tranny usually shifts on mph. I'd do a converter, valve body and input shaft.

 

i did a transgo shift kit and it helped out a little, it still slips but its better than it was before. A valve body will probably help out a little more, but for $50 i went with the shift kit and decided to save the $400 to put towards a built trans.

 

I'am not slipping, the rpm's run up to 3200 and then hang there for a few seconds before shifting. The pause at 3200 rpm's is what I want to get rid of.

 

Nobody has a inexpensive way to get these transmissions to shift. I mean whats the sence in hopping up a truck if you waste all your quarter mile time waiting for the transmission to shift into the next gear. Man I would hate to loose to a ricer by 3 or 4 lengths just because the transmission takes 1-2 seconds to shift.

Guess I'll try manually shifting next time and see if that helps.

 

Honestly man, if you're hopping up a CTD and running it in the 1/4 mile you will need a tranny sometime in the near future (and probably sooner than later). It sounds like you enjoy racing quite a bit. Like chrleb1 said, you really should have a TC/VB/BI at the very least. Just my $.02.

 

I agree, a TC, VB, and BI is definitely what is needed.

My new '07 5.9 hangs at 3200 on the 3-4 shift, and it's stock. It's just the nature of the beast.

In fact, I think I'm going to put off my Kore/Lorenz/Carli suspension and do trans mods first.

 

Yah I'am from the late 60's early 70's and love racing. I know I'll need a transmission upgrades along with other upgrades when it's time to get serious. If a valve body is the only way to get rid of the hesitation then that's what I'll have to do. It seems to me with a computer controled transmission there should be a way to get it to shift when you want or at least instantly. If theres no guaranteed way to get rid of the shifting hang up then there's no way I'am investing money. I'll simply buy another car to hop up. Seems to me all these guys on these boards racing are wasting there time if they can not get components to work in a way that's needed for racing.

Don't want to come off as sounding pi$$y, that's not my intentions. Some times translation between my head and fingers gets haywire.

 

[QUOTE=JCLeary;1695096]My new '07 5.9 hangs at 3200 on the 3-4 shift, and it's stock. It's just the nature of the beast. QUOTE]

Exactly what I want to get rid of.

You guys with modified transmission did it solve this problem?
Who and what was done to get rid of it?
Thanks,