I tried asking this on another forum, but I'm not getting much response. I've read about everything transmission-related on here that I could find, but apologies if I missed an obvious answer to my question somewhere.
My 98 XJ (4.0) AW4 suddenly started not shifting out of first the other night. If I let up on the gas it would go up to higher gears, but if I didn't it seemed like it would probably redline without shifting. It threw a CEL, and the scan tool said P0700 (Transmission Control System), P0753 (Shift Solenoid A Electrical) and P0751 (Shift Solenoid A Performance or Stuck Off). Fluid looked fine.
After reading on here and elsewhere, I replaced the TPS first. No luck. It's shifting out of first now (a little late, but it does it), but *seems* to be skipping 2nd and going straight to 3rd. (If I put the lever in 1/2 it seems to stay in 1). Besides the TPS replacement and an attempt at adjusting my throttle valve cable (it seemed to be fine), I haven't done anything else.
I did check the resistance of the solenoid circuits at the TCU, and they were within range. At least I *think* they were — it was hard to get a consistent reading.
Prior to this, I had 2-3 instances where it seemed to delay going into first gear in the last several months, but just a moment's hesitation and no further problems.
At any rate, I'm stumped. Before I shell out the $200 and an afternoon's work to try the solenoids, any other suggestions? And can I count on their resistance being off at the TCU if they're bad, or might they be bad and read OK?
Thanks!
My 98 XJ (4.0) AW4 suddenly started not shifting out of first the other night. If I let up on the gas it would go up to higher gears, but if I didn't it seemed like it would probably redline without shifting. It threw a CEL, and the scan tool said P0700 (Transmission Control System), P0753 (Shift Solenoid A Electrical) and P0751 (Shift Solenoid A Performance or Stuck Off). Fluid looked fine.
After reading on here and elsewhere, I replaced the TPS first. No luck. It's shifting out of first now (a little late, but it does it), but *seems* to be skipping 2nd and going straight to 3rd. (If I put the lever in 1/2 it seems to stay in 1). Besides the TPS replacement and an attempt at adjusting my throttle valve cable (it seemed to be fine), I haven't done anything else.
I did check the resistance of the solenoid circuits at the TCU, and they were within range. At least I *think* they were — it was hard to get a consistent reading.
Prior to this, I had 2-3 instances where it seemed to delay going into first gear in the last several months, but just a moment's hesitation and no further problems.
At any rate, I'm stumped. Before I shell out the $200 and an afternoon's work to try the solenoids, any other suggestions? And can I count on their resistance being off at the TCU if they're bad, or might they be bad and read OK?
Thanks!