AT has hard time shifting after 50mph... cold or what?

pyrodork

New member
i have a 94 v6.


for the past month or so, there is the occasional (and all too frequent) time when i accelerate to highway speeds, the trans sticks (in 4th?) and revs in the whereabouts of 3k+ rpms.

what i have found to remedy this is to either speed up faster (sometimes going into the 65-70mph range before it shifts), or simply slowing down to 30-40mph range before speeding up again. once it does make that shift, though, there are no problems the rest of the trip. i've checked the tranny fluid and it is full and looks fine. i also went and added a JB transmission conditioner with no improvements.

this only seems to happen when it's relatively cold. i bought my truck in june from washington state and brought it back to minnesota, where it will stay for awhile. i'm worried that it may be, or may develop into a larger problem. any assistance is appreciated.







and on a side note, some other issues:
--- since i bought the truck, there has been (what sounds to be) a buzzy-type rattle from around the shifter case (passenger side?). ironically enough, it never happened when i brought it into the shop. it doesn't seem to hinder any performance, just my sanity. any ideas?

--- acceleration is usually poor, starting can take 4-5 seconds on a crank. added Lucas fuel system cleaner, checked dist. cap, spark plug wires (would've checked spark plugs, but it looked like a job for superman). my next thought is the fuel filter. i bought it from a toyota dealer, so i'd think that they would've replaced it... but who knows? any other possibilities?

--- there's a shimmy when i begin to brake at speeds above 30mph. had alignment checked (possibly, only the front was checked), checked out fine. tires inflated correctly. pretty sure the balance is correct. there's a weak suspension in the back due to the long, fully-loaded haul (with trailer) from WA->MN that i'm ready to replace. might that weak suspension have something to do with the shake? what else should i look for?



thanks!
 
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Every modern auto tranny I've driven, won't shift into overdrive in cold temperatures until there is a little heat in the transmission. If that's what's happening, I wouldn't worry about it.

As for the long cranking, I would replace the plugs, and fuel filter, and air filter, if it's dirty.

Unless the truck displayed horrible driveability, and the dealer needed to replace parts in order to sell it, they wouldn't spend any money on it.

As for the shimmy when braking, most likely you have warped front rotors.

Good luck.
 
02SE said:
Every modern auto tranny I've driven, won't shift into overdrive in cold temperatures until there is a little heat in the transmission. If that's what's happening, I wouldn't worry about it.

As for the long cranking, I would replace the plugs, and fuel filter, and air filter, if it's dirty.

Unless the truck displayed horrible driveability, and the dealer needed to replace parts in order to sell it, they wouldn't spend any money on it.

As for the shimmy when braking, most likely you have warped front rotors.

Good luck.

Right on the money!!
 
didnt think the tranny would be that affected by new technology and weather, but it sounds like that might possibly be what's going on.


hmm, never really considered the rotors. is there a relatively accurate way that i can check them myself without paying $400 for a shop to do it?


bought a new fuel filter today. havent installed it yet, but imma try to get that in today. hopefully my nips wont scratch the paint with it being as cold as it is. air filter is fine, though. i got one of those k&n drop-in replacements around august/september and i check it somewhat frequently.




thanks! this is all helping me out a lot!
 
do the rotors your self

Replace them. For older vehicles there are usually a lot of aftermarket rotors available, and they are cheap ($50-75 each). Add a set of pads ($25) and you're all set. just a couple hours if you take your time.
 

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