I don't know if this will help you out or not but my truck stock was an 87 2200, 5 speed. After the 5.0 automatic swap I used the stock rear end (wich I was told was close to 3:73) with 265/50/15's. At 100km or 60 MPH I was at about 2200 RPM in overdrive. If I was still just in drive it would be over 3000 RPM. I blew the rear end 2 times and replaced it with the same rear end and kept the same shift points every time. Hope that helps.
Baggedb22, SORRY BOUT THAT DUDE, I ONLY HAVE INTERNET ACCESS AT WORK, I WAS OFF SAT, AND SUN. THIS LAST WEEKEND.
YOU SAID "So when i got home i jacked up the ass end and counted the times the driveshaft went around. 1 complete revolution of the wheel the driveshaft only spun around twice so that would mean im in the 500 (somthings correct me if im wrong!) But i need to no if any other stock mazda has lower gears! Or if any company makes lower gears for my truck 65mph, im tackin like 3500 rpm...
HELP!"
I BELIEVE THAT YOU SHOULD HAVE ROTATED THE DRIVESHAFT AND COUNTED THE TIMES THE TIRES TURNED.... , AND I THINK THAT THE CARRIER ON OUR AXLES HAS A STAMP WITH THE GEAR RATIO, OR A "VIN STAMP" THAT TELLS WHAT IT IS. ALL 86-93, 2 WD B2200'S , AND 86-87 B2000'S HAD THE SAME REAR GEARS BOTH IN THE AUTO AND MANUAL TRANNYS (3.909:1), THE 4WD'S HAD LIKE 4.11'S AND YOU CAN SWAP OUT THE CARRIER WITH THE MAZDA NAVAHO'S, THE ONLY THING YOU CAN GET FOR THE 4 WD REARS IS A LOCKER, AND THEY ARE HARD TO FIND. AS FAR AS THE 2 WD REAR, THE CARRIER IS SUPPOSED TO BE A DIRECT SWAP WITH THE 86-91 RX-7 GXL'S BUT THE GEARING IS THE SAME BUT IT IS LIMITED SLIP. NOW THE TRANNYS FROM AN 84-85 RX-7 ARE GEARED THE SAME AS OURS, LESS THE FIFTH GEAR, WHICH IS .807:1 (12A ENGINE), .711:1 OR .758:1 (13B ENGINE), COMPARED TO OUR TRUCKS WHICH ARE .858:1, WHICH WOULD LET YOU TURN LESS RPM AT SPEED.
WHAT I WAS LOOKING AT DOING IS GETTING A REAR END FROM A YOTA 4WD, THEY COME WITH A PLETHERA OF GEAR RATIOS (3.58:1, 3.909:, 4.10:1, 4.11:1), THEY ARE BEEFIER, HAVE LIMITED SLIP, AND YOU CAN GET A DISC BRAKE CONVERSION FROM DOWNEY OFF ROAD. WITH THE 3.58:1 AND A RX-7 TRANNY WITH .711:1 FIFTH GEAR YOU SHOULD BE ABLE TO RUN @70 MPH AND TURN @ 2000 RPM DEPENDING ON TIRE SIZE, BUT WITH THAT REAR GEAR RATIO (3.58:1) YOU WOULDN'T GET OUT OF THE HOLE AS FAST! GO TO GOOGLE AND TYPE IN GEAR RATIO & RPM CALCULATORS AND CHECK OUT SOME OF THEM TO GIVE YOU A BETTER IDEA...
GOOD LUCK!
welp guys the older mazda gears do not work! the ring gear is 8" instead of 7.25" and you cannot just swap out the ring and pinion with b/c the 8" pinion will not fit in the 86-93 rear housing, also the 86-93 axles are tappered alot more then the 80-85 axles. So im still trying to find a company that makes the ring and pinion theres gotta be one out there. or atleat gears that will work i'd really like to not have to redo my hole 4 link/ backhalf...