allen

______Repost from the general section_____

Hello,
I'm new here and this is my first post. I've got a 92 LS400 that I just bought. I hopped in it last night to drive it home and it wouldn't shift out of first gear when I put it in "D", it would drive fine but I obviously couldn't get it up past 20-30 mph without revving the crap out of it. I tried to manually shift it from 1 to 2 to D and it didn't do anything, just stayed in first the whole time. It was also ideling kind of rough and was slightly surging when I first accelerated and when I decelerated

It has the correct amount of fluid, 152k miles and I just bought it so I'm not sure of it's maintanance history. It shifted fine the first three times I've driven it (except for the rather harsh engagement into "P" from "D").

Anyone know what might be causing this?

thanks for any help,
allen

cnacne

Do a search on how to obtain trouble codes.

Possibly a solenoid?

Joe

allen

Ok fellas, got it fixed!
The problem was a faulty speed sensor. Apparently the LS400 tranny has three speed sensors, one on the passenger's side rear, one on the driver's side rear and one on the driver's side front by the bell housing. The one on the passenger's side rear sends it's signal to the instrument cluster, I unplugged it to make sure it was working and it was (because the speedo needle quit working). Next, I replaced the one on the driver's side rear and that fixed my problem. It now shifts through all gears just fine!
I can't believe this little sucker actually went bad, you don't expect something like that to go out, especially on an otherwise reliable car like a lexus.

later,
allen