Transmission in reverse, but still in park.....

[wolf_06]

Sometimes, I put my transmission in reverse, but won't engage the reverse gear, it will stay in park. I put it back on park and back in reverse, and it will be ok.

It only does this in colder mornings. I had zero problems during summer or warmer temperature. can this be the transmission fluid temperature sensor? or something else? The transmission works perfect during normal driving, downshift, etc.

Btw, its automatic trans.

I need help on this one please.

Thanks!

 

[GearheadTool]

I had a car that performed similarly once. Something is causing the first clutch pack (which shares reverse, btw.. R and 1 gears) to not engage when its cold. Re-doing it jostles something...

Some cars really do work better once fully warmed. Its strange!

 

[Rand]

maybe your cable is stretched or stuck?

 

[scurvy]

Originally Posted By: Rand
maybe your cable is stretched or stuck?


The linkage from the shifter to transmission was my thought as well.

 

[wolf_06]

It could be very possible, is this complicated to fix?

 

[Rand]

depends on what the problem is.


if its something inside the transmission.. possibly.

if its the linkage... no.

 

[hounddog]

Possably stuck valve/hanging valve in the valve body. Ask a trans repair shop. How long since its been serviced? I might try a BG fliud exchange on it with the BG cleaner then conditioner added. Might be a gum/varnish issue.

 

[Gotch]

Two different things could be ocurring here.

One - The trans is indeed staying in "Park" with the prawl engaged. This would be a linkage/adjustment issue.

Two - Hydraulic issue. Fluid Level, worn clutch packs, sticking valves/solenoids etc.

Try duplicating on a slight incline/decline. If the car "coasts" then linkage can probably be ruled out.

 

[wolf_06]

Originally Posted By: Gotch
Two different things could be ocurring here.

One - The trans is indeed staying in "Park" with the prawl engaged. This would be a linkage/adjustment issue.

Two - Hydraulic issue. Fluid Level, worn clutch packs, sticking valves/solenoids etc.

Try duplicating on a slight incline/decline. If the car "coasts" then linkage can probably be ruled out.
what ''coasts '' mean?

 

[ARCOgraphite]

coast = The parking pawl will disengage and car will then roll - but is not engaging the gear, isolating this as a hydraulic (valvebody) or E-solenoid issue. (Snap diagnoses is a fluid viscosity/ filter issue given it acts up when COLD) Whn was fluid last changed. Fluid may be imperfect naphthenic petro oil now and not the fantastic spermwhale brain oil and need a changeout with new tarnny filter.

 

[wolf_06]

My mecanic saw that the oil was -48 degrees. The only oil sensor on the car is on the transmission. Is the oil sensor be an issue?

 

[mechtech2]

"BTW its automatic trans"
LOL!

Probably in the shifter mechanism. They can be subtly complicated.

 

[eljefino]

It could be an empty data bit, or the scanner is not correctly reading. If you have no CEL I would bet on it being a poor translation from your car computer to the mechanic's handheld one.

If it were in a limp home mode it would work the same way every time. I don't know of any transmissions that would resolutely refuse to move if it were arctic cold out. They do shift funny, late, delay overdrive, TCC etc when cold but they do move.

I had a GM work truck where the linkage was off a little and I had to go halfway into park then down into reverse to engage it. Kind of becomes second nature when one drives junk a lot.

 

[Rand]

Originally Posted By: ARCOgraphite
coast = The parking pawl will disengage and car will then roll - but is not engaging the gear, isolating this as a hydraulic (valvebody) or E-solenoid issue. (Snap diagnoses is a fluid viscosity/ filter issue given it acts up when COLD) Whn was fluid last changed. Fluid may be imperfect naphthenic petro oil now and not the fantastic spermwhale brain oil and need a changeout with new tarnny filter.

what the heck drugs were you doing today alleycat.

 

[ARCOgraphite]

NO drugs - just a little automotive history. I guess you didnt know most autotrans fluid was spermwhale oil until recently?

 

[zzyzzx]

Did you check the fluid level and if so how?

 

[OVERKILL]

Originally Posted By: ARCOgraphite
NO drugs - just a little automotive history. I guess you didnt know most autotrans fluid was spermwhale oil until recently?


Define "recently". 1972 was when it was phased out. I wouldn't call that recent.

 

[RF Overlord]

I thought it was diff lube friction modifier that was made from whale oil?

 

[wolf_06]

Can I top off my tranny fluid with another brand name. I think hyundai use semi-sythetic or something......

Would this bother anything?