42RLE help and questions

[Dylpickle200]

Hey guys I’m new to automatic tjs I’ve only ever had manuals in the past. I have a 42RLE in my jeep with only 80k miles on it, i have 35” tires and am regeared to 5.13. I’ve been having an issue when I’m accelerating to freeway speeds sometimes it does not shift into over drive which I have seen in this forum a ton but it’s also accompanied by a smell I can only compare to a burning clutch in a manual. Do yall have any idea what this could be or what the issue is? Fluid is at perfect level and looks brand spanking new I bought the jeep at a very small dealership and I’m assuming all of the fluids were replaced before I bought it. I’ve done a full axle swap sye and changed the motor oil. Everything was clean and looked like new fluid trans pan has what looks to be brand new paint marker numbering the bolts on the pan. I’ve never owned an automatic before so I’m just at a loss with this one

If it helps when it fails to shift to overdrive if I feather the throttle a tad it will shift into over drive after a few very light taps like barely enough to rev

also want to note after this happened I got home and checked around for excessive heat and it didn’t seem like the trans was abnormally radiating very hot. I am going to install a temp gauge and trans cooler asap but want to get this sorted out too

 

[Juggernaut]

Hey guys I’m new to automatic tjs I’ve only ever had manuals in the past. I have a 42RLE in my jeep with only 80k miles on it, i have 35” tires and am regeared to 5.13. I’ve been having an issue when I’m accelerating to freeway speeds sometimes it does not shift into over drive which I have seen in this forum a ton but it’s also accompanied by a smell I can only compare to a burning clutch in a manual. Do yall have any idea what this could be or what the issue is? Fluid is at perfect level and looks brand spanking new I bought the jeep at a very small dealership and I’m assuming all of the fluids were replaced before I bought it. I’ve done a full axle swap sye and changed the motor oil. Everything was clean and looked like new fluid trans pan has what looks to be brand new paint marker numbering the bolts on the pan. I’ve never owned an automatic before so I’m just at a loss with this one

If it helps when it fails to shift to overdrive if I feather the throttle a tad it will shift into over drive after a few very light taps like barely enough to rev

also want to note after this happened I got home and checked around for excessive heat and it didn’t seem like the trans was abnormally radiating very hot. I am going to install a temp gauge and trans cooler asap but want to get this sorted out too

Before throwing money at a gauge and cooler, (sounds like you may need that money for other repairs), scan for codes.

You should see a P0208 and possible a P0714 if the trans is running over temp. Next I would disconnect the battery to clear the PCM. When you reconnect, note if the shift behavior is better in the beginning part of the next trip out. Once the codes reset, the shifting will be adjusted to high temp schedule and will be worse.

With the fluid and pan looking new, I would assume someone has serviced the trans due to an issue.

 

[JMT]

Hey guys I’m new to automatic tjs I’ve only ever had manuals in the past. I have a 42RLE in my jeep with only 80k miles on it, i have 35” tires and am regeared to 5.13. I’ve been having an issue when I’m accelerating to freeway speeds sometimes it does not shift into over drive which I have seen in this forum a ton but it’s also accompanied by a smell I can only compare to a burning clutch in a manual. Do yall have any idea what this could be or what the issue is? Fluid is at perfect level and looks brand spanking new I bought the jeep at a very small dealership and I’m assuming all of the fluids were replaced before I bought it. I’ve done a full axle swap sye and changed the motor oil. Everything was clean and looked like new fluid trans pan has what looks to be brand new paint marker numbering the bolts on the pan. I’ve never owned an automatic before so I’m just at a loss with this one

If it helps when it fails to shift to overdrive if I feather the throttle a tad it will shift into over drive after a few very light taps like barely enough to rev

also want to note after this happened I got home and checked around for excessive heat and it didn’t seem like the trans was abnormally radiating very hot. I am going to install a temp gauge and trans cooler asap but want to get this sorted out too

You definitely need a temp gauge and sender. Everything else is just guessing.

 

[mrblaine]

Before throwing money at a gauge and cooler, (sounds like you may need that money for other repairs), scan for codes.

You should see a P0208 and possible a P0714 if the trans is running over temp. Next I would disconnect the battery to clear the PCM. When you reconnect, note if the shift behavior is better in the beginning part of the next trip out. Once the codes reset, the shifting will be adjusted to high temp schedule and will be worse.

With the fluid and pan looking new, I would assume someone has serviced the trans due to an issue.

That's like telling someone who had a blow-out with a steer tire that instead of buying a new tire, they should go back down the road and see if they can find what they ran over to cause the tire damage.

 

[Juggernaut]

That's like telling someone who had a blow-out with a steer tire that instead of buying a new tire, they should go back down the road and see if they can find what they ran over to cause the tire damage.

Not really. Just saying to start simple and at no out of pocket cost.

Is a cooler and gauge a good idea, absolutely. If the pcm is seeing an overheat his shifting is going to be off. He also has a 05 with an integrated TCM and known issues, among which are false over temp shifting.

 

[mrblaine]

Not really.

Yes, really.

 

[Juggernaut]

Yes, really.

OP - you need a cooler and gauge. And a spare tire.

 

[Jerry Bransford]

Was the engine running while you were checking its ATF level?

 

[LONGJP2]

Hey guys I’m new to automatic tjs I’ve only ever had manuals in the past. I have a 42RLE in my jeep with only 80k miles on it, i have 35” tires and am regeared to 5.13.

How long has it been regeared?
Maybe someone ran 35s for a long time before that and wore it out.