Rear diff bushing window weld

[AA95101]

Has anyone filled in the voids in the rear differential bushings with window weld poly?

I know this used to be a big thing in the gto community

Thank you

 

[D.J.]

Are you experiencing some sort of extreme wheel hop issues?

 

[Stiletto]

ATQ makes poly bushings. PRG used to make an insert kit.

 

[RogueIV]

ATQ makes poly bushings. PRG used to make an insert kit.

I don't know about you but paying $460 for 4x ATQ diff bushings seems excessive. At least the PRG kit includes things that actually cost money to make and is still cheaper (if they still make the kit).

Window weld may work, I've seen this approach used in many other cars. Might be worth a shot, what's the worst that can happen?

 

[DoctorStiches]

I have never had wheel hop but my suspension is all stock.... and awd...

 

[Ohiocruiser]

I did! But i used windshield adhesive for that. Also used it on lower arm bushing(big round one)

 

[AA95101]

Thanks for the reply’s.

I haven’t had any issues I was just curious if anyone had done it and if they had seen any noticeable improvement, as well as any added nvh.

 

[AusStinger]

I did! But i used windshield adhesive for that. Also used it on lower arm bushing(big round one)View attachment 68713View attachment 68718

I know this is an old thread but....... and ?
Did you feel any improvement ?

I was literally thinking about doing this......

I have seen the ATQ kit ( which would be the best way I'm sure ) but it's $$ and a somewhat hefty job.

 

[Thomby]

Wouldn't this just be a milder version of a diff brace? Since the picture above shows a diff brace, I would assume that's already more rigid than filling in the bushings, right?

 

[Stiletto]

Wouldn't this just be a milder version of a diff brace? Since the picture above shows a diff brace, I would assume that's already more rigid than filling in the bushings, right?

Correct.

 

[AusStinger]

Wouldn't this just be a milder version of a diff brace? Since the picture above shows a diff brace, I would assume that's already more rigid than filling in the bushings, right?

I'd say yes but there's no way I'd put one of those BMS diff braces on my car. That's just asking for trouble IMO.

 

[Ohiocruiser]

I know this is an old thread but....... and ?
Did you feel any improvement ?

I was literally thinking about doing this......

I have seen the ATQ kit ( which would be the best way I'm sure ) but it's $$ and a somewhat hefty job.

I really don't know if filling of the differential bushings did anything. But filling the control arm definitely improved the driving feeling. Too bad it failed whith 10k miles. There's polyurethane bushing option for big control arm now. And I am waiting for another forum member to try them out. I wish there was just solid rubber bushing for control arm.

 

[AusStinger]

I really don't know if filling of the differential bushings did anything. But filling the control arm definitely improved the driving feeling. Too bad it failed whith 10k miles. There's polyurethane bushing option for big control arm now. And I am waiting for another forum member to try them out. I wish there was just solid rubber bushing for control arm.

So the rear didn't firm up and squirm less?

 

[oddball]

I struggle to understand the diff brace interest. That won't affect what happens at the wheels at all - they have their own suspension. The only purpose is NVH reduction. The gears in the diff make noise, so isolating it stops that from resonating through the car.
The only real possibility is the pinion climbing, then unloading causing shock to the tires. But that would require some extremely sticky tires.

 

[Ohiocruiser]

So the rear didn't firm up and squirm less?

I don't drive hard enough to notice that.

 

[Thomby]

I struggle to understand the diff brace interest. That won't affect what happens at the wheels at all - they have their own suspension. The only purpose is NVH reduction. The gears in the diff make noise, so isolating it stops that from resonating through the car.
The only real possibility is the pinion climbing, then unloading causing shock to the tires. But that would require some extremely sticky tires.

I think the intent is more about resisting differential windup/movement, and forcing more direct torque transfer, than any reduction in NVH. Similar to polyurethane engine/transmission mounts and other driveline bushings, if anything it's going to increase NVH, as a cost of taking flex out of the driveline.

Diff braces are popular with the Explorer ST guys because there is very noticeable flex under hard launches, especially once you start tuning that Ecoboost V6. Some even bend or break the diff bolts.

 

[BIG-D]

I'd say yes but there's no way I'd put one of those BMS diff braces on my car. That's just asking for trouble IMO.

Catch a flight up and drive my car, i rate it highly...

 

[djerickd]

I did the window weld trick back in the day on a bunch of Subaru bushings and mounts. I was thinking of doing similar on the Kia.

 

[AusStinger]

Catch a flight up and drive my car, i rate it highly...

View attachment 88271

Thanks for the offer mate.

I do like the thought of a diff brace just not a completely rigid one.
I feel like there needs to be "some" kind of dampening in there to avoid cracking either the diff housing or the rear cradle.

If there was a heavy / dense rubber pad or shock damper in there somewhere I would be all over it.
I was thinking about buying one and modifying it to "my concept" but was considering a less obvious alternative just out of curiosity.....

 

[Ohiocruiser]

Thanks for the offer mate.

I do like the thought of a diff brace just not a completely rigid one.
I feel like there needs to be "some" kind of dampening in there to avoid cracking either the diff housing or the rear cradle.

If there was a heavy / dense rubber pad or shock damper in there somewhere I would be all over it.
I was thinking about buying one and modifying it to "my concept" but was considering a less obvious alternative just out of curiosity.....

There's nice bushing set for rear differential. But, the price for installation tool is making it hard to swallow. 2018-2022 Kia Stinger Differential Bushing Kit