can sumbody explain this to me...i just got a 86 c10 and the guy said he installed a shift kit?? wut exactly is a shift kit
im new to workin on trucks just kinda learnin as i go

 

A shift kit is a retune for an automatic, basically increasing line pressures for faster shifts, reducing wear on the clutches.

 

so...when this guy took em for a test drive he was dropping it down into first and flooring it it seemed liek it shifted itself into second but at a realllllllly high rpm and it chirped into second i wasnt payin much attention to wat he was doinbut would it do that or do i have to shift into second manually, it seems like he waited a really long time cuz i could hear the motor workin it musta been a 9k rpms

 

9000RPM == engine parts on road... Unless its built for it that is.

A TH350, depending on the kit may shift out of 1st into 2nd at redline or may stay locked into 1st. Like I said, that all depends on the kit.

 

o idk it sounded like the engine was gonna explode but when it shifted(or was shifted) into second the wheels spun

 

where do you find a shirt kit like this? never even heard of anything like it either....

 

idk the guy said he put it in he didnt tell me wut kind or any details
he also said he put a stall converter in??? im not sure wut he ment if im not mistaken thats the same as a torqu converter? and all auto trany's have them right?

 

it probably just means it's shifting faster and harder... A shift kit basically will readjust the way the tranny shifts... My friend had a kit on his 4x4 Blazer, and that thing shifted hard! It would easily chirp the tires going into second and it rode on 35's

 

A stall convertor is the same thing as a torque convertor. More than likely he just got one with a higher rpm limit.

So with the old one you could've launched (hold down brake, rev up motor then let go of brake) at like 2200 rpms (don't know the exact number) and now it will be able to launch at a higher rpm giving it a faster and more powerful take off.

 

Phew... This is an oldie. LOL

Anyway, without modification to the motor, a higher stall converter would hurt your ET as these motors build excellent torque down low (90% available at 1500RPM). When you would use a higher stall torque converter would be if you had your torque peak at say 4500RPM and it dropped of quickly down in the lower RPM. You would want the launch RPM to be up in the higher torque RPM range.

I believe the stock stall is anywhere from 1800-1900RPM.

And yes, a shift kit shortens the shifts, making them more harsh. A short shift is a transmission saving shift! The longer it takes, the more heat and wear generated on the clutch packs.