trans coolier/shift problem

**monsterjam5000** · 10-16-2010

i am using this trans coolier on my 1998 gtp.
Hayden Automotive 678 - Hayden Fluid Coolers - Overview - SummitRacing.com

not sure if the problem was there when i first installed the trans cooler.
but now i have noticed my trans shifts high, 3 grand each gear when I am just cruising around town. is this normal?

could the trans coolier be causing this?
could the trans be to cold and torque lock up not working?
could drit or grit in trans from having 190,000 miles maybe clogging up trans cooler, increasing presser, and restricting flow?
could torque converter be going out?
could trans just be going out?

also if i floor it WOT it shifts at 5700, is this normal?

need some feeback dont want to rip off the cooler if thats not the problem.

**Fivefingerdeathpunch** · 10-16-2010

not sure on the cooler part,

but 5700-5900 is normal, these is really no power past 5500

**monsterjam5000** · 10-16-2010

alright it shifts a 5700 in normal and performance shift.
I thought performance shift increased shift rpm?

but any help on the high shift problem while daily driving?

**Whiplash Performance** · 10-17-2010

Did you check your fluid a few times after you installed your cooler?
Also did you see what color the fluid is while you were installing the cooler?

**gtpinsc** · 10-17-2010

i dont think performance shift changes shift points... just increases line pressure for quicker firmer shifts.

**monsterjam5000** · 10-17-2010

Yes it checked fluid it was ok, but today I am going to go dex6. 8 quarts right for trans pan drop and filter

**TheOtherNick** · 10-17-2010

yup around that.

**monsterjam5000** · 10-17-2010

all right a little update, i did a tranny pan drop and filter change with dex 6, still does the same thing.

at 70 my rpms are at 2100 if that maters at all.

but i noticed when i hit the brake to stop the cruise control the car revs up a little, why would it do this now?

**monsterjam5000** · 10-18-2010

another update if i let off the gas a little it will shift early, but if i stay on the gas it still climbs to 3,000 rpm then shifts.

**monsterjam5000** · 10-19-2010

Help

**QUICKSILVER462** · 10-20-2010

I don't know if this will have any relation to the condition you are expieriencing, but the computer will not lock the converter until the trans. temp is above 80 degree.
I found that out prowling around in the transmission parameters of my tuner program.

Now, if your trans temp is not high enuff, possibly the computer is delaying shifts to speed the warm up of the engine and transmission, (in theory).

**monsterjam5000** · 10-20-2010

Originally Posted by monsterjam5000

i am using this trans coolier on my 1998 gtp.
Hayden Automotive 678 - Hayden Fluid Coolers - Overview - SummitRacing.com

not sure if the problem was there when i first installed the trans cooler.
but now i have noticed my trans shifts high, 3 grand each gear when I am just cruising around town. is this normal?

could the trans coolier be causing this?
could the trans be to cold and torque lock up not working?
could drit or grit in trans from having 190,000 miles maybe clogging up trans cooler, increasing presser, and restricting flow?
could torque converter be going out?
could trans just be going out?

also if i floor it WOT it shifts at 5700, is this normal?

need some feeback dont want to rip off the cooler if thats not the problem.

thats what i was saying in my first post, how would i check that?

**torq455** · 10-22-2010

Originally Posted by monsterjam5000

all right a little update, i did a tranny pan drop and filter change with dex 6, still does the same thing.

at 70 my rpms are at 2100 if that maters at all.

but i noticed when i hit the brake to stop the cruise control the car revs up a little, why would it do this now?

This is normal.