Installing Figs rear diff bushings... have some questions
04-19-19, 03:40 PM
#16
Just knocked this job out. Took me 8 hours going at a very comfortable/slow pace. Hit some snags pulling out the old bushings as expected and removing/reinstalling the axles as there is only so much flex and room to work with. No noticeable increase in NVH.
EDIT: Just took the car on a 450 mile road trip. There is some subtle gear whine at 65-67mph and around 85-90mph. If I could go back in time, I'd pass on this mod.
EDIT: Just took the car on a 450 mile road trip. There is some subtle gear whine at 65-67mph and around 85-90mph. If I could go back in time, I'd pass on this mod.
Did you notice an improvement in the way the rear end feels, particularly during hard acceleration?
04-19-19, 06:51 PM
#17
Just knocked this job out. Took me 8 hours going at a very comfortable/slow pace. Hit some snags pulling out the old bushings as expected and removing/reinstalling the axles as there is only so much flex and room to work with. No noticeable increase in NVH.
EDIT: Just took the car on a 450 mile road trip. There is some subtle gear whine at 65-67mph and around 85-90mph. If I could go back in time, I'd pass on this mod.
EDIT: Just took the car on a 450 mile road trip. There is some subtle gear whine at 65-67mph and around 85-90mph. If I could go back in time, I'd pass on this mod.
04-19-19, 07:17 PM
#18
Driver
Thread Starter
I'm totally stock, so its probably just lack of any other noises. The whine is very minute, but I my ears pick it up modulating the throttle. As far as feeling more planted, I am still running the junk economy tires the previous owner put on, so I never had wheel hop to begin with. Perhaps with some sticky tires I'd notice a difference.
I'm really just trying to reduce this on/off throttle slop in the drivetrain. I do a lot of high revving mountain driving modulating the throttle and all my passengers turn into bobble heads during light throttle transitions. There's definitely a lot of play somewhere and my guess is the motor mounts are quite worn.
I arbitrarily used Lucas synthetic 75w-90 this time around.
I'm really just trying to reduce this on/off throttle slop in the drivetrain. I do a lot of high revving mountain driving modulating the throttle and all my passengers turn into bobble heads during light throttle transitions. There's definitely a lot of play somewhere and my guess is the motor mounts are quite worn.
I arbitrarily used Lucas synthetic 75w-90 this time around.
04-19-19, 07:33 PM
#19
I'm totally stock, so its probably just lack of any other noises. The whine is very minute, but I my ears pick it up modulating the throttle. As far as feeling more planted, I am still running the junk economy tires the previous owner put on, so I never had wheel hop to begin with. Perhaps with some sticky tires I'd notice a difference.
I'm really just trying to reduce this on/off throttle slop in the drivetrain. I do a lot of high revving mountain driving modulating the throttle and all my passengers turn into bobble heads during light throttle transitions. There's definitely a lot of play somewhere and my guess is the motor mounts are quite worn.
I arbitrarily used Lucas synthetic 75w-90 this time around.
I'm really just trying to reduce this on/off throttle slop in the drivetrain. I do a lot of high revving mountain driving modulating the throttle and all my passengers turn into bobble heads during light throttle transitions. There's definitely a lot of play somewhere and my guess is the motor mounts are quite worn.
I arbitrarily used Lucas synthetic 75w-90 this time around.
04-20-19, 06:39 AM
#21
Moderator
Motor mounts and maybe carbon drive shaft will help? I’m guessing, the stock driveshaft has to many guibo bushings. It’s a Lexus, all the bushings are designed for comfort. Call figs, they make all replacement bushings and can help you diagnose.
04-22-19, 03:41 PM
#22
Tech Info Resource
iTrader: (2)
Does it always make the sound or is it throttle dependent?
04-22-19, 03:57 PM
#24
Tech Info Resource
iTrader: (2)
That's odd. I replaced my spool at the same time I did the bushings, so I expected change, but only found a very slight whine and only on neutral throttle. It's at any speed. Definitely nothing speed dependent on mine. I drive with no music/radio more often than not because I like the native sounds of the car, so I notice the little things very quickly.
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