Just looking for any ideas of things to check, thanks in advance. Transmission and motor mounts have been replaced with OEM, trans fluid is fresh and at correct level. While driving, normal shifting is very good, downshifting fine. 1-2 shift a little more perceptible than others, many other shifts I cannot feel whatsoever. No hesitation, no slipping, no missed shifts. However even at idle RPM of 650, I feel a very noticeable jolt putting the car into reverse and the entire car lurches slightly. Slight jolt putting into drive, but less pronounced than reverse. Again any ideas appreciated thank you. 1995 LS400.

 

good work changing the mounts since that's where i would start, then look into ATF fluid age and level which you also did.
the last thing i would check is the driveline itself, specifically the u-joints and guibo bushing (or flex disk). also check your rear diff mounts.

more on guibo bushing:
https://www.clublexus.com/forums/ls-...sk-damage.html

 

And the center support bearing for the driveshaft.

 

my car doesn't jerk when going into reverse but once already moving only if i'm going up a hill or something it might kind of judder a bit between like 0 and 3 mph... been that way as long as i can remember but doesn't seem to get worse so i'm just leaving it alone

 

I posted in the other thread but may as well list here - mine bucks pretty badly going from reverse to drive or vice versa. The RPM's will surge to like 1200-1300 and then get slammed down.

Mid throttle 2-3 shift can be pretty harsh, otherwise shifts wonderfully.

 

Same situation same work done on mine.
Had the vehicle up on the lift and visually checked with the techs to see the drive shaft flex discs, center bearings. Differential mounts?? That I didn’t know about🤦‍♂️

I had the differential fluid drain and filled a month ago.

 

Thanks very much everyone for the ideas.

Situation has been materially improved but not completely solved by re-adjusting my cables particularly pressure cable from the throttle body to transmission. I had adjusted but I think I didn’t tighten them down enough and they were falling out of spec. If that pressure (some call it “kickdown”) cable is too tight it makes the bucking much worse I find and can be a major contributor. I have adjusted according to factory manual although I cheat just a hair or two to the softer side…

I am worried about the cable situation generally, stretching over time and if transmission gets moved for a repair and they don’t unhook the cable, damage to the cable etc. In my car’s history also the shifter assembly was replaced at one point. It feels like an egg that can’t be unscrambled without a real specialist. Dealership near me no surprise wont dive into adjusting cables on a 95 trans. At least one trans shop I called won’t touch a car this old. As of this morning though with the cables re adjusted and tightened down much more deliberately she seems to be shifting quite nicely. I am reminded constantly of the words of one Lexus tech who told me just remember - this car will never be perfect don’t drive yourself crazy!!