Possible Trans Issue Any Ideas

**nate2000gtp** · 04-18-2012

My car is a 2000 Grand Prix GTP 53,000 miles

My trans shifts very firm, And doesnt give me crap, Ive had it for a week or so now.

Today i noticed 1-2-3 shifts perfect than i noticed when going into 4th (overdrive) Its rpms jump maybe 200-300rpms than come down quickly and it locks up and stays locked (this isnt every time just depends on throttle position), It doesnt slip out of overdrive but does jump a few hundred before settling down, With it having super low miles i really cant understand it having a bad tranny?

any help would be appreciated

Nate

(Pic of car)

**dsmuts** · 04-18-2012

Better junk it and give it to me

just playing but if you haven't done a fluid and change do that. Mine was slipping into od when i bought it and now 20K miles later it's still holding up.

**nate2000gtp** · 04-18-2012

Originally Posted by dsmuts

Better junk it and give it to me

just playing but if you haven't done a fluid and change do that. Mine was slipping into od when i bought it and now 20K miles later it's still holding up.

Haha and i may be just imagining things, because it drives amazing, But rpms to rise up slightly sometimes going into over drive, But it doesnt come out, So it didnt make sense to me, Trans fluid doesn't smell burnt..Meh idk

**Hippo Machine** · 04-18-2012

Nice car! Low mileage is great!! Just keep up on tranny maintenance, you will be fine.

**nate2000gtp** · 04-18-2012

Originally Posted by Hippo Machine

Nice car! Low mileage is great!! Just keep up on tranny maintenance, you will be fine.

So i take it, That his little "issue" i noticed insn't a huge deal?

**BillBoost37** · 04-19-2012

In third gear the TCC locks up. You'll notice this is about 200-500 rpm. When going to 4th the TCC unlocks, shifts to 4th then relocks.

Sounds like what you are experiencing. aka normal.

**Rico** · 04-19-2012

Originally Posted by BillBoost37

In third gear the TCC locks up. You'll notice this is about 200-500 rpm. When going to 4th the TCC unlocks, shifts to 4th then relocks.

Sounds like what you are experiencing. aka normal.

Yea, until he gets code P1870 and the PCM sets the line pressure to max. LOL