How To: GS Rear Subframe into RS Chassis

Mazda_Power · Post by **Mazda_Power** » September 24th, 2005, 2:34 pm

Further inspection of my MX-3 showed that the rear suspension needed a little attention. Both lower control arms were bent... on each side. The tires were worn horribly with massive postive camber! Also the sway bar was slightly bent because a broken end link was rubbing on it from the side. All of this added up so I figured why not just change it all out?

If you decide that you want to drop the whole thing (like what I am going to try and explain) there are two brake lines that need to be unbolted from the subframe. They are located slightly on the left side on the top if you are looking from the rear. Be carefull and use lots of WD-40 or equivelent becaue the brake lines tend to brake (seize up and twist). Next take off the brake cables. You will have to disconnect them from the "Y" connection under the heat shield. You will also need the GS's brake cables as they connect differently to the calipers than the RS's do. The entire rear suspension subframe unbolts with just 4 - 14mm bolts. Take one off each side and leave the other two "half out". Next take out the bolts for the trailing arms:17mm I believe. Then comes the four 17mm strut to spindle bolts. Your next task will be getting a jack to hold up the subframe as you unbolt the remaining two 14 mm bolts. Once they are off have a few helpers hold either side as you lower the jack. Then just slide it out from underneth and throw it in the neighbor's yard...

Installation is reverse of removal, it's pretty straight forward. just don't forget to bleed the brakes. The MX-3 GS subframe had other goodies such as a solid rear anti-sway bar, and a tie bar. It took me a total of 10 hours for me to do all this, but that includes getting the subframe out of the GS in the junkyard, going home, getting my truck, driving back to pick it up, and taking it back home for installation. If you have the subframe and other neccessary parts expect 2-3 hours for a decent install.

Good Luck!

Aaron

Mazda_Power · Post by **Mazda_Power** » September 24th, 2005, 2:42 pm

Cpl_Bryant · Post by **Cpl_Bryant** » September 24th, 2005, 11:57 pm

Seems like a lot less work than the common rear disc swap. Is the MX-3 GS the ONLY subframe that will work and have the rear disc breaks?

Sam Baker · Post by **Sam Baker** » September 25th, 2005, 1:55 am

thats gotta be the dirtiest mx3 i've ever seen

props!

jschrauwen · Post by **jschrauwen** » September 25th, 2005, 3:02 am

Sam Baker wrote:thats gotta be the dirtiest mx3 i've ever seen props!

ROTFLMAO

Mazda_Power · Post by **Mazda_Power** » September 25th, 2005, 5:54 pm

Sam Baker wrote:thats gotta be the dirtiest mx3 i've ever seen props!

Thanks. It takes skills like no fender liners, dirt roads, water, and the need to slide around every corner!

Mazda_Power · Post by **Mazda_Power** » September 25th, 2005, 5:56 pm

Cpl_Bryant wrote:Seems like a lot less work than the common rear disc swap. Is the MX-3 GS the ONLY subframe that will work and have the rear disc breaks?

I'm sure on that one. Maybe some Protege's had rear discs. As far as MX-3's I think the GS is the only one with rear discs.

MX-3.com

How To: GS Rear Subframe into RS Chassis

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How To: GS Rear Subframe into RS Chassis