has anyone put the whole first gen rear end into a rx3 using the stock 4 link setup?


just wondering how hard it is to set up the links to work properly

 

If you're considering a 4-bar w/ watts linkage (4-link refers to adjustable setups), I'd consider a Panhard rod like in the RX-2. The Watts link used on the 1st Gens kept the diff centered exactly in the chassis, but had a bad tendency to bind. I've never heard of someone trying to transplant one, though.

 

well what can i do to upgrade rear handling?

im putting the gslse rear end in with brakes and a mazda comp diff, so i just want to know what else i can do to make it handle better.


within reason

 

Back in the day, the RX-3 was a quicker car than the RX-2 on the track, and I'd think that everyone knew all the same tricks. You might consider narrowing the GSL-SE axle and keeping your rear leafs. The problem with reusing the 4-bar rear from the -SE is that you won't have the same pickup points in the RX-3, so your links won't be located in all the right spots (on the chassis end) without an awful lot of work. You'd need to either keep the rear leafs, which perform pretty well, or take the spring perches off the -SE rear, work the coilover rear into the car, and buy an adjustable 4-link so that you can adjust your pinion angle and everything else.

4-link from Summit: http://store.summitracing.com/partde...5&autoview=sku

 

I have an extra leaf, lowering blocks, 2-link, repositioned shocks and a rear swaybar. Goes good around the track

 

thanks for the link.

that 4 link system looks sweet.
i might give it a shot.


any other ideas are welcome

 

Too bad your so far away,I have a GSL rearend that I narrowed for my 78 GLC.Worked great for years,but the car rusted away and I ditched it.The rear was pricey so I kept it in hopes of finding it a new home.It has LSD and discs and could easily have the 4 link brackets cut off for leaf spring perches.I need to sell it badly,but its hard to find GLC enthusiats!!! :-)

 

I have an 84 GSL-SE rear under mine, (remenber the 1 st gen 7 is a good bit wider but I have wide fenders), I looked into using the 4-link but I did not feel the time and massive rework of the chassis was worth it, I removed the original rear end spring pads, and welded them on the new rear ( measure the pad angle relative to the pinion gear centerline carefully, also the pinion on the center section will end up slightly offset in the trans tunnel as the 7's drive line is offset to the right of chassis centerline), I am using a slightly modified 1st gen watts link, ( I personally do not like how the panhard setup), and a 1974 lincoln markIV rear swaybar (I had it and it fit perfect was the right size and required only a little mounting bracket fab work... to make the brakes work Russell fitting makes adaters as the thread pitch is different, I also used the -SE proportioning valve and removed the rear brake residual valve from the stock brake master (I used the larger of the 2 rx-3 masters for the volume required for the larger brakes that I have), and will be installing an adjustable brake bias control... hope this helps

 

I'd narrow the RX7 rear and adapt it to the leafs and add an adjustable Panhard rod before I'd try to transplant the 4 link. The 4 link is not really that good of a setup due to binding, as Crit noted. This can be overcome by using spherical rod ends ($$$) but it still doesn't address the roll steer.