So yeah, dads 97 GMC savanna conversion van deal. We tore it all apart and put on a new timing chain and waterpump and stuff a while ago.



And while we were at it we changed transmission fluid. Cause when we drove it up onto the rhino ramp deals my dad had left the transmission cooler off. So all the fluid relocated itself to the driveway. We also put some super thick *** stuff that was supposed to help something. Then this problem shows up.

It's solid through 1st and 2nd, but when it shifts to 3rd the engine just spins freely and the van is coasting.



So we think, hmm, might be that super thick fluid stuff clogging the filter or something. Pull the pan off drain it and all that. Didnt see a ton of metal like a a gear or something had come apart.



But there were two boxish looking sensors or something. Not sure what they are, but one was solidly attached and the other one turned and flopped around like crazy.



But we're like, lets try new filter and that anyways.Today on goes a new filter and filled it with new ATF. The problems still there. 1st, fine, 2nd fine, 3rd vroom coasting.



I'm thinking this loose box thing is possibly making it not want to be cool and go into 3rd. Anyone have any ideas? advice? anything?

 

Just a thought, reattach the box thing!???!?!?!?!?!?





:P



Sean

 

BANGBUS?

 

is there a tranny shop in your area? those trannys arent expensive to have worked on

 

I thought you wern't supposed to change automatic fluid often... When you put new fluid in, it can cause the clutches to slip since the new fluid doesn't have the grittyness the old fluid did. As dumb as it may sound, old dirty fluid I heard is better for a auto trans. Sounds like your having the exact problem I described with the slipping clutches..

 

[quote name='nopistons94' date='May 26 2005, 02:20 PM']I thought you wern't supposed to change automatic fluid often... When you put new fluid in, it can cause the clutches to slip since the new fluid doesn't have the grittyness the old fluid did. As dumb as it may sound, old dirty fluid I heard is better for a auto trans. Sounds like your having the exact problem I described with the slipping clutches..


[/quote]



1st and 2nd are completely solid and 3rd isnt there at all. Its not slipping its like it's in neutral pretty much.

 

[quote name='Leetheslacker' date='May 26 2005, 03:31 PM']1st and 2nd are completely solid and 3rd isnt there at all. Its not slipping its like it's in neutral pretty much.


[/quote]







thats what slipping clutches do though... don't allow the power to go to the wheels AKA netural type of feeling. Who knows though, take it to a shop like the others said.

 

Yeah, automatic transmissions are a mistery to anyone who doesn't work at a tranny shop. Those tranny shop guys are actually wizards, trained in AutoMagic. The go to school with Harry Potter.

 

throw a handfull of sawdust in it...

 

[quote name='nopistons94' date='May 26 2005, 02:20 PM']I thought you wern't supposed to change automatic fluid often... When you put new fluid in, it can cause the clutches to slip since the new fluid doesn't have the grittyness the old fluid did. As dumb as it may sound, old dirty fluid I heard is better for a auto trans. Sounds like your having the exact problem I described with the slipping clutches..


[/quote]



this info is so wrong, your supposed to change your fluid once a year or so depending on mileage and who you talk to



now if it hasnt been changed in a long *** time, like over 100k miles or so, the opinion of most is that its best to leave it alone.



No one will ever tell you not to change transmission fluid as a regular maintance item ever.





My guess is that super thick **** fucked the pump up and a tranny rebuild is in your future.Are you sure the fluid is at the proper level and your checking it properly? Fluid not at the proper level can cause shifting problems, its not like low oil where the car still drives the same.