Project SC300 Road Racer: Part 30 – Sometimes You Finish Where You Should’ve Started
using MAP torch to heat differential ear
The MAP gas torch was used to heat the differential tabs a bit, and then a dead blow hammer made quick work of removing the bushing from the housing.


wearing black rubber gloves and applying grease to bushing
Grease those bushings!


close up of rear subframe crossmember showing one round bushing installed and one empty hole for the other bushing
One down, one to go.


view from inside subframe showing bushings at different depths in their holes
Here’s a picture of the inside of the subframe, allowing you to see the differential bushings.

You will need to take care to sink the bushings to the proper depth in the subframe. If they are too deep, you won’t be able to get the spacers in between the bushing and the differential. If they are too shallow, the bolt won’t reach.

Once the front tabs of the differential housing are bolted to the subframe, the differential cannot move forward or backward.


using two screwdrivers and a pry bar to rotate bushing in housing
Another reason that the liberal application of grease is useful is that it allows the bushing to be rotated in the subframe without much trouble.

You don’t want to try rotating it once it’s inserted in a dry hole. Lube it up and it will work better.

You don’t need to get the orientation perfect, but you want to get in the right ballpark. Otherwise, the bolt holes don’t line up at all, and you cannot get the bolts back into the differential housing.


  1. At this point, I’m more interested in hearing about you getting your money’s worth out of this thing than more upgrades. That’s not to say the work recently posted isn’t first class, but if it can’t run the times it’s for naught. I’m genuinely curious how fast this thing is as is.

    1. You and me both — curious how it’ll do. I got some lap times at Grid Life Road Atlanta last season and they were alright. Off the pace for NASA ST2 times but respectable considering I still didn’t even have a baseline for the car. Heck, I’m still figuring out starting tire pressure.

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