99 XJ - 4.0L - AW4 - NP242 - 175k Miles
4" Lift, 33" Tires
Trans Fluid & Filter Changed 10k Miles ago
Owned as a DD for 18 months.
Thanks in advance for any help. Haven't had any real problems until about 2 weeks ago. The issue started very slowly and is now constant. Hope I can describe it well enough to give you an idea.
When going up a hill with the transmission in "D", moving along at highway speeds there will be an almost violent jolt felt through the entire vehicle. The jolt happens as you are increasing throttle to maintain speed going up a hill. As if it is activated by the transmission attempting to drop down into the lower gear, but it does not drop into the lower gear. If you anticipate the jolt and decrease throttle it will not happen. However you are now not maintaining speed. If you give it a strong increase in throttle it will shift down just like it should have automatically.
This started out of the blue about 2 weeks ago. It has progressed to now doing it whenever the above conditions exist (all the time). But now not just in "D". If you keep the trans in "3" it will do the same in the above conditions just not as violent a jolt.
Again if you can anticipate the jolt you can ease off the throttle and stay in the present gear or give it more throttle than necessary and it will successfully shift down. Also you can shift down manually with the gear shift and it works fine.
Replaced TPS yesterday did not help. Adjusted TV cable no difference.
Thanks again for any help.
4" Lift, 33" Tires
Trans Fluid & Filter Changed 10k Miles ago
Owned as a DD for 18 months.
Thanks in advance for any help. Haven't had any real problems until about 2 weeks ago. The issue started very slowly and is now constant. Hope I can describe it well enough to give you an idea.
When going up a hill with the transmission in "D", moving along at highway speeds there will be an almost violent jolt felt through the entire vehicle. The jolt happens as you are increasing throttle to maintain speed going up a hill. As if it is activated by the transmission attempting to drop down into the lower gear, but it does not drop into the lower gear. If you anticipate the jolt and decrease throttle it will not happen. However you are now not maintaining speed. If you give it a strong increase in throttle it will shift down just like it should have automatically.
This started out of the blue about 2 weeks ago. It has progressed to now doing it whenever the above conditions exist (all the time). But now not just in "D". If you keep the trans in "3" it will do the same in the above conditions just not as violent a jolt.
Again if you can anticipate the jolt you can ease off the throttle and stay in the present gear or give it more throttle than necessary and it will successfully shift down. Also you can shift down manually with the gear shift and it works fine.
Replaced TPS yesterday did not help. Adjusted TV cable no difference.
Thanks again for any help.