Need advice please.
2001 Isuzu Trooper Limited, 4wd., about 110K miles.
Transmission fluid is full, smells and looks good.
A few years ago the torque converter exploded and I had that fixed.
Then transmission started taking a long time to shift into reverse in the morning, this has continued and has become progressively worse.
At some later time I began having intermittent shuddering, grinding with loss of power. It always sounded to me like the Park Pin was trying to engage, but no-one could ever diagnose. At first the noise occurred when the truck had been sitting for a bit, and was within the first mile or so. As it progressed it occurred randomly at any time. Then one day it suddenly stopped.
Shortly after that I unfortunately had an accident, I rear-ended a car at low speed, <10 mph. No damage to the Trooper, but maybe related?
Then shortly after that, while on the freeway. Slowed to a stop due to traffic, then the truck would rev up but the transmission slipped. I could slowly get to 15 mph and after that the transmission was relatively OK, but felt “soft”.
Takes a long time to shift into reverse.
Transmission is slipping in D, D2, D3 etc ranges and has essentially no grab. Undriveable from a stop.
Transmission works fine in R and L.
Can currently move it if necessary by starting out in L, then shifting to D range, but it’s still “soft” in D range, becoming more normal in feel at higher speeds, and seems almost normal at freeway speeds.
Web searches indicate possibly 1. Range Sensor, 2. Solenoids, 3. Belts.
Local repair shops are hopeless and I will not return to the shop I used previously.
Acura denies that they ever sold Troopers with an Acura badge - never mind that they did this for 2 years as their first truck and that I saw one just last month!
I think this is a fix it myself task.
I can clean the range sensor, if I can find it.
Not sure if I can source the solenoids, how to specify them, where they are, if I can do this with regular tools or if it requires some specialty tool.
Belts are beyond my capabilities.
Please advise if any of these scenarios are probable, it’s something else, or if I am donating this to Public Radio… AND how to proceed if you can identify a likely cause - i.e. location of these things on the truck, how to correctly specify the new parts, where to purchase, etc.
I have a mechanics manual for the 1992 Trooper, but not for the 2001. These are essentially the same vehicle. (1992 Trooper was lost to Tropical Storm Alison and is no longer with us, so I can’t use it for parts.)
I don’t want to spend a lot of time/effort/money on this, but it is really nice having a beater truck for those (many) chores where I don’t want to use the brand new Land Rover.
Please respond if you solid experience with the 4L30E transmission. No speculations please.