Trany slipping
Trany slipping My tranny is starting to slip alittle and I heard that type-F fluid has more cleaning agents or something to that nature, so it might help clean up the slipping shift. Has anyone ever heard or tried this? even still, all i can do it drain and fill so it wont be 100% type-F, probably a 60% mercon III - 40% type-F??
your clutches inside the tranny are most likely work out, this is very common when you start modding a car, happened to me, now i just bought a TCI rebuild kit. and going to get a TC, a 5 pinion rear planetary, and a beast sunshell. 
Clean your MAF before you do anything else.
Trans line pressure is controlled based on
load, load is airflow and RPM, airflow is bent
when your MAF is fouled.
The SLP MAF for early years is also not right,
it's biased lean/low. That hurts line pressure.
As to what the Diablosport tune consists of,
no idea.
B&M Trick Shift (a Type F based) put a big
hurt on my TCI converter. You'd best get the
converter manufacturer's blessing, not
random Internet dudes' opinion. It comes
down to cases, the clutch materials used.
Supposedly some of the cheapo plastic
bushings inside the 4L60E don't particularly
want their friction modified either.
A can of contact cleaner is a cheap thing to
try.
Trans line pressure is controlled based on
load, load is airflow and RPM, airflow is bent
when your MAF is fouled.
The SLP MAF for early years is also not right,
it's biased lean/low. That hurts line pressure.
As to what the Diablosport tune consists of,
no idea.
B&M Trick Shift (a Type F based) put a big
hurt on my TCI converter. You'd best get the
converter manufacturer's blessing, not
random Internet dudes' opinion. It comes
down to cases, the clutch materials used.
Supposedly some of the cheapo plastic
bushings inside the 4L60E don't particularly
want their friction modified either.
A can of contact cleaner is a cheap thing to
try.
Change the fluid and filter , dont use type f unless you have disabled the PWM function other wise you will get bad converter chatter if its a pwm car , while your in there remove the three 10mm bolts securing the 2nd acumulator and remove then take a torx bit and turn the screw in the center of the pcs (preasure control solinoid)1/4 turn clockwise and reinstall the accumulator , This may help for a little while but sounds like your about to be in the markets for a transmission
hope this info is usefull
performabuilt
hope this info is usefull
performabuilt
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I used to re-build trannies in the 1970's - before any computer stuff was out.
Anyway, back then, changing the fluid on a slippping unit would do one of two things:
1. Reduce the slipping since new fluid runs cooler
2. Totally trash the seals, cause more slippping, clutch damage and usually immediate failure
The above result often had to do with how far the unit had been damaged. A good "wiff" of the fluid should give you an indication of how far gone it might be.
Older GM units (TH400, TH350, Pwrgld, ect.) did not have drain plugs for the converter so when you dropped the pan for a fliud swap only 4 quarts of 12 drained out - a great GM design feature!
....not sure what GM does these days, however. I would not replace the fliud with F-Type, however.
One of my cars, a BMW has a sealed tranny without a dip stick - sticker on pan says, "synthetic transmission fluid - do not change for the life of the car"!!!
...spookes the hell out of me!
Anyway, back then, changing the fluid on a slippping unit would do one of two things:
1. Reduce the slipping since new fluid runs cooler
2. Totally trash the seals, cause more slippping, clutch damage and usually immediate failure
The above result often had to do with how far the unit had been damaged. A good "wiff" of the fluid should give you an indication of how far gone it might be.
Older GM units (TH400, TH350, Pwrgld, ect.) did not have drain plugs for the converter so when you dropped the pan for a fliud swap only 4 quarts of 12 drained out - a great GM design feature!
....not sure what GM does these days, however. I would not replace the fliud with F-Type, however.
One of my cars, a BMW has a sealed tranny without a dip stick - sticker on pan says, "synthetic transmission fluid - do not change for the life of the car"!!!
...spookes the hell out of me!
