I have a 1980 Mazda Rx7 I was just wondering where i can buy an LSD and where i can find an 84-85 rear end to convert the rear drum brakes to disc brakes.

 

Keep looking in the classified on this forum and others. They come up quite a bit. Just need to find one close. If you live in salt country, rusted out donor cars can be had very cheap!

 

I found mine off of a 1983 GSL at a self serve junk yard. Get the break lines even if they are cut. The Disk breaks use a different fitting then the drum. You can have them custom made more cost effectively if you have the correct fittings in hand.

 

I'm curious about what you guys do when the bearings start going out on the axles? A friend of mine bought an 85 Gsl off of me and started getting bearing noise from the rear end. Looking into it you have to have at least 700lbs of pressure to seat the new bearings after you cut the old ones out. He took it to a Mazda dealer to have them do it and after paying a small fortune, he says they're still making noise. Anyone had this kind of issue and found a fix or do you just replace the rear end?

 

Bearings or bushings? Bearings should never take that much force, it could easily ruin the bearing itself. A few taps with a hammer should be adequate to seat a bearing. Bushings, on the other hand, really need to be pressed in/out on a hydraulic press.

 

The axle bearings on fb's are pressed onto the axles inside the backing plate. You pull the axle and backing plate all as one then cut the retaining collar and old bearing off to seperate the backing plate from axle. To reassemble you put the backing plate on the axle then press the bearing on. Next you must press the regally collar on. According to Haynes "if the retaining collar can be fitted with less than 2.7 tons (5900 lbs) of force, it is not tight enough and should be replaced with another one." the Mazda fsm said a similar amount of force if I remember correctly but it's been awhile since I've browsed it and I had my Haynes manual handy. The Haynes manual is for 79-85 all submodels rx7 and the section quoted was in ch 8 section 2 step 22

 

Retaining not regally



Damn auto correct