Im planning on taking my LJ into the transmission shop over spring break to try and solve this issue once and for all. But before I do that, I'd like to see if guys can help me diagnose the problem first. Either to see if it's something I could fix myself or what I should ask the shop to look for.
So, to keep it short, my problem only occurs when the engine and transmission are up to operating temperature and when the weather is above 50F.
So whenever I shift out of Reverse and into drive, I sense the transmission lagging, like it's stuck in neutral. This lag usually lasts less than a second, but on occasion, the lag will take a second or more, and when it does make the shift, I can hear the transmission clunk slightly and feel the vehicle lunge a bit. Occasionally, I've needed to press on the accelerator to get it to make the shift.
When it's still warming up the Reverse to drive shift is smooth and silent.
This problem began a few months after having the fluid changed at a shop. They also replaced the filter.
So far, I have:
Checked and added fluid
replaced leaky Transmission coolant lines
Drained trans fluid and replaced pan seal due to fixing a leak from the seal
Replaced trans fluid after replacing pan seal, then later topped off the fluid
The only fluid I have used is ATF+4
Still, my problem persists.
After several hours of surfing this forum and other websites, I've boiled this down to likely being a valve body issue either due to gunk intruding into the valve body or to seal/ piston deterioration, allowing fluid to move where and when it shouldn't.
But I wanted to see if anyone else here might've had a similar issue and how you fixed it or if you guys have any opposing ideas for what might be the issue.
I would like to mention @mrblaine since he seems knowledgeable about TJ transmissions.
So, to keep it short, my problem only occurs when the engine and transmission are up to operating temperature and when the weather is above 50F.
So whenever I shift out of Reverse and into drive, I sense the transmission lagging, like it's stuck in neutral. This lag usually lasts less than a second, but on occasion, the lag will take a second or more, and when it does make the shift, I can hear the transmission clunk slightly and feel the vehicle lunge a bit. Occasionally, I've needed to press on the accelerator to get it to make the shift.
When it's still warming up the Reverse to drive shift is smooth and silent.
This problem began a few months after having the fluid changed at a shop. They also replaced the filter.
So far, I have:
Checked and added fluid
replaced leaky Transmission coolant lines
Drained trans fluid and replaced pan seal due to fixing a leak from the seal
Replaced trans fluid after replacing pan seal, then later topped off the fluid
The only fluid I have used is ATF+4
Still, my problem persists.
After several hours of surfing this forum and other websites, I've boiled this down to likely being a valve body issue either due to gunk intruding into the valve body or to seal/ piston deterioration, allowing fluid to move where and when it shouldn't.
But I wanted to see if anyone else here might've had a similar issue and how you fixed it or if you guys have any opposing ideas for what might be the issue.
I would like to mention @mrblaine since he seems knowledgeable about TJ transmissions.
