Throttle cable causing slip?

[LittleGiant]

At the risk of drastically oversimplifying how it all works..... The computer takes some inputs and tells certain solenoids to fire/un-fire. Those solenoids control fluid presssure to make certain clutch packs apply/un-apply

If it's slipping, that means that the clutches aren't able to apply enough friction to give you the gear in question. That could be because the frictions aren't frictiony (technical term) enough. Or it could be because there isn't enough pressure to push the clutches together. Or there would be enough pressure but something is bleeding off that pressure.

If it's flaring, that often means that there is a delay in applying/un-applying the pieces that take you from 3 to 4 in your case. Imagine you had a manual and you hit the gas hard while the clutch is still pressed, you'll flare the RPMs. So maybe a solenoid is slow to do it's thing, or maybe the computer is slow to tell it to do it's thing. Or maybe one clutch pack is slow to bleed off the pressure, or slow to have pressure applied.

But honestly I don't have a 42RLE so I'm just kinda going off how things work in general. The computer & solenoids make it extra hard for a novice like me to troubleshoot. On the other hand, it's probably why every transmission shop in the world will immediately just tell you that you need a rebuild — troubleshooting is hard and rebuilding is profitable.

That’s really good info. It’s definitely flaring. I felt it try and shift from 3-4 and it just rev’d then shifted as if I held in the clutch too long as if it was a manual.

 

[hear]

That’s really good info. It’s definitely flaring. I felt it try and shift from 3-4 and it just rev’d then shifted as if I held in the clutch too long as if it was a manual.

If it was transmission/solenoid/wiring I would've expected the flaring issue to stay with the transmission. But since it seemed to follow the computer, it seems like the most likely culprit is PCM-related. But also, I think I would've expected WranglerFix to call it a flare if that what it was, vs saying it slipped. So that's sus too.

EDIT: to be perfectly clear — I would expect that WranglerFix knows more than me about most everything Jeep-related, so I would trust their assessment over mine.


In summary.....rebuild it. LOL.

 

[LittleGiant]

If it was transmission/solenoid/wiring I would've expected the flaring issue to stay with the transmission. But since it seemed to follow the computer, it seems like the most likely culprit is PCM-related. But also, I think I would've expected WranglerFix to call it a flare if that what it was, vs saying it slipped. So that's sus too.

EDIT: to be perfectly clear — I would expect that WranglerFix knows more than me about most everything Jeep-related, so I would trust their assessment over mine.


In summary.....rebuild it. LOL.

Can flaring be torque converter related?

 

[LittleGiant]

Recommendations on buying a rebuilt one? Brand?