i know this is probably so easy and ill probably look dumb, but ill ask anyways. i have the axles and 3rd member from a GSLSE and a spare rearend with an open differential. if i swap out the axles and 3rd member it will be the exact same thing as a GSLSE rearend right? also the rearend i have is from an 84. i just wanted to know before i went through the trouble of doing it. thanks.

 

You can use the GSL-SE 3rd member with a GSL or GS rear end. The GSL-SE's axles will not fit the GSL or the GS casing. Yes you would still end up with a 4:10 ratio minus the GSL-SE rotors and calipers. Im in the situation as you right now.

 

so itd basically be a drum brake rearend with posi and 4:10 gears? well i dont think itd be worth the swap then. i think id rather just keep the parts as spares for the GSLSE rearend i already have

 

It is my understanding that the rear end housing (axle housing) is the same part for the GSL and GSL-SE in 1984-85.

I installed a set of GSL-SE axles in my 1984 GSL rear end housing, and had no problems. All 1984 and 1985 RX-7s have the larger diameter rear axles and front axles. The GSL-SE has a different bolt pattern for the wheels, of course.

In my particular case, I was doing a brake conversion to the 2nd Gen brakes, and bought the GSL-SE axles, had them redrilled with the 5 bolt pattern. Some details of my conversion are shown at:

www.cardomain.com/ride/646433

 

thats all i need to know, if the housing from the open differential drum brake rear end will work with all GSLSE parts.

 

so basically all i can do is install the 3rd member so i will have a drum brake rearend with posi? or install the 3rd member on a GSL rearend and itd have posi with disc but with the 4x110 pattern?