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jeepmor · 06-18-2022, 05:36 PM

Recent updates

STI Group N engine mounts traded out for the Torque Solutions. NVH is gone. In/out throttle isn't as crisp as the torque solutions.

I was still having suspension hurky jurkies occasionally in first when trying to feather the clutch around the parking lot or freeway start stop traffic. The Whiteline insert kit helped, but I still had a problem Still not happy, I ordered a Cusco rear diff brace.

Just installed it this morning. Took about an hour from start to finish in the driveway. You cannot use the Whiteline kit and the Cusco brace together. Pull your LCAs down for access, worth the room to reach inside the rear housing to mount the bolts.

I'm impressed, it appears it fixed that occasional diff flop, clutch chatter, wheel hop suspension bind I was getting in the back. And there is no discernible difference in NVH, really impressed with that. I have to admit I was a bit nervous thinking I was going to reintroduce the Torque Solution level NVH. You can still feel the deflection of the whole system, it's just stiffened quite a bit stiffer and no longer floppy soft feeling in first gear.

In the end, my boost and bushing journey has landed me here.

JDM STI engine mounts
Whiteline trans bushing insert
Whiteline rear diff outrigger mount bushings
Whiteline rear subframe insert bushings
Cusco Rear diff brace

I do attribute my low speed problems to my South Bend 350 ftlb clutch. It bites harder than the OEM rating and deflects the bushings more making this issue more prevalent. I put the clutch in before the boost and don't regret it. But it took these parts to make the new clutch and boosted power feel similar to the OEM car manners again.

The Torque Solution motor mounts are a bit too stiff. I couldn't find any softer urethane bushings for them. 75 durometer only, a 50 or 60 might be a good compromise, but I haven't found them yet. I also appreciate them for what they are, true race car gear. Their driving feel was really superb, the NVH was just too much for my commuter. As for the Whiteline diff inserts I removed, these were a big help, but still too soft with the stiff clutch. The Cusco brace really shines here now. I was nervous I'd bring more racecar NVH into play, but that was a pleasant nothing burger. NVH is same as it was before. The stiffer bushes in the rear have me hearing the diff more, but it's not obnoxious like the TS motor mounts could get.

06-18-2022, 05:36 PM	#19
jeepmor Senior Member Join Date: Apr 2014 Drives: 84 CJ7, 08 Duramax, 2014 FRS Location: Oregon Posts: 486 Thanks: 347 Thanked 131 Times in 105 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Recent updates STI Group N engine mounts traded out for the Torque Solutions. NVH is gone. In/out throttle isn't as crisp as the torque solutions. I was still having suspension hurky jurkies occasionally in first when trying to feather the clutch around the parking lot or freeway start stop traffic. The Whiteline insert kit helped, but I still had a problem Still not happy, I ordered a Cusco rear diff brace. Just installed it this morning. Took about an hour from start to finish in the driveway. You cannot use the Whiteline kit and the Cusco brace together. Pull your LCAs down for access, worth the room to reach inside the rear housing to mount the bolts. I'm impressed, it appears it fixed that occasional diff flop, clutch chatter, wheel hop suspension bind I was getting in the back. And there is no discernible difference in NVH, really impressed with that. I have to admit I was a bit nervous thinking I was going to reintroduce the Torque Solution level NVH. You can still feel the deflection of the whole system, it's just stiffened quite a bit stiffer and no longer floppy soft feeling in first gear. In the end, my boost and bushing journey has landed me here. JDM STI engine mounts Whiteline trans bushing insert Whiteline rear diff outrigger mount bushings Whiteline rear subframe insert bushings Cusco Rear diff brace I do attribute my low speed problems to my South Bend 350 ftlb clutch. It bites harder than the OEM rating and deflects the bushings more making this issue more prevalent. I put the clutch in before the boost and don't regret it. But it took these parts to make the new clutch and boosted power feel similar to the OEM car manners again. The Torque Solution motor mounts are a bit too stiff. I couldn't find any softer urethane bushings for them. 75 durometer only, a 50 or 60 might be a good compromise, but I haven't found them yet. I also appreciate them for what they are, true race car gear. Their driving feel was really superb, the NVH was just too much for my commuter. As for the Whiteline diff inserts I removed, these were a big help, but still too soft with the stiff clutch. The Cusco brace really shines here now. I was nervous I'd bring more racecar NVH into play, but that was a pleasant nothing burger. NVH is same as it was before. The stiffer bushes in the rear have me hearing the diff more, but it's not obnoxious like the TS motor mounts could get. Last edited by jeepmor; 06-19-2022 at 12:49 AM.