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BamZipPow · 09-14-2015, 12:52 PM

I could hear some extra scraping noises when I was backing up and also that my mileage hasn't been where it had been in the past so I started looking around the rig to see what might have changed. A quick peek under the rig I noticed that the rear diffuser had sagged in the middle rear below the rear axle.

Pulled the rear diffuser off and installed a slotted metal 90° angle iron to better support the middle load across the diffuser.

I also installed a rubber strap in the middle to better support the diffuser load from bouncing instead of relying on the rear wheel strakes to support the pounding from the diffuser.

I can now install my rear vent panel without any significant gaps.

Current rear view...

Hopefully this will reinstate my mileage again.

09-14-2015, 12:52 PM	#19 (permalink)
BamZipPow T-100 Road Warrior Join Date: Apr 2008 Location: The Woodlands, TX Posts: 1,920 BZP T-100 (2010) - '98 Toyota T-100 ext cab - 3.4L/auto SR5 Last 3: 24 mpg (US) BZP T-100 (2011) - '98 Toyota T-100 ext cab - 3.4L/auto SR5 Last 3: 23.66 mpg (US) BZP T-100 (2009) - '98 Toyota T-100 ext cab - 3.4L/auto SR5 Last 3: 19.01 mpg (US) BZP T-100 (2012) - '98 Toyota T-100 ext cab - 3.4L/auto SR5 Last 3: 25.45 mpg (US) BZP T-100 (2013) - '98 Toyota T-100 SR5 Last 3: 25.79 mpg (US) BZP T-100 (2014) - '98 Toyota T-100 SR5 Last 3: 23.18 mpg (US) BZP T-100 (2015) - '98 Toyota T-100 SR5 Last 3: 23.85 mpg (US) BZP T-100 (2016) - '98 Toyota T-100 SR5 Last 3: 17.62 mpg (US) BZP T-100 (2017) - '98 Toyota T-100 SR5 90 day: 20.78 mpg (US) BZP T-100 (2018) - '98 Toyota T-100 SR5 90 day: 20.19 mpg (US) BZP T-100 (2019) - '98 Toyota T-100 SR5 BZP T-100 (2020) - '98 Toyota T-100 SR5 2012 Scion iQ - '12 Scion iQ Base Thanks: 3,479 Thanked 1,395 Times in 968 Posts	I could hear some extra scraping noises when I was backing up and also that my mileage hasn't been where it had been in the past so I started looking around the rig to see what might have changed. A quick peek under the rig I noticed that the rear diffuser had sagged in the middle rear below the rear axle. Pulled the rear diffuser off and installed a slotted metal 90° angle iron to better support the middle load across the diffuser. I also installed a rubber strap in the middle to better support the diffuser load from bouncing instead of relying on the rear wheel strakes to support the pounding from the diffuser. I can now install my rear vent panel without any significant gaps. Current rear view... Hopefully this will reinstate my mileage again. __________________ Dark Aero-The world's first aerodynamic single wheel boat tail! Last edited by BamZipPow; 09-14-2015 at 01:00 PM..