Old School and Other Rotary Old School and Other Rotary Powered Vehicles including performance modifications and technical support

Shortening gearbox

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Old 05-10-10 | 09:41 PM
  #26  
argatoga's Avatar
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Just to verify the B2000 housing will bolt right on and give me a couple inches less.
Old 05-11-10 | 12:50 PM
  #27  
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It will move the shifter forward about 5 or 6 inches from the RX7 location. I was able to mount a 12A using a modified RX7 front mount and the stock Midget chassis locations. It put the shifter pretty damn close to the middle of the stock hole.

I might even have the header I made for the car if you need one. The engine sat nice and low in the chassis and I made an oil pan for it as well, I don't think I have that anymore. Now that I'm thinking about it, it was closer to ten years ago... crap I'm getting old.
Old 05-11-10 | 02:00 PM
  #28  
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that first one looks to be from a gslse. the last one i saw with that little vent like thing on the side came from a gslse.
Old 05-24-10 | 11:57 AM
  #29  
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A couple junk yards here have two wheel drive B2000 / B2200 gearboxes. The tailshafts look like they would give at most a 1/4 of an inch. Is there a casting number? These are marked '84 and '85.
Old 08-20-10 | 03:45 PM
  #30  
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I'm still not having success finding one of these shorter tail shafts. Anyone know where to look?
Old 08-31-10 | 04:01 PM
  #31  
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I finally found the right tailshaft. The B2000 using the F series engine has the closer positioned shifter ('80-'84).


Old 09-04-10 | 01:48 AM
  #32  
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What if it needs to be longer????

Not every swap has the same requirements. I needed to move the shifter BACK exactly six inches for my German RX-7, and the attached photo shows how I did it. I took six inches of a scrap shifter rod and welded it to my 83 RX-7 shifter rod, then made a bracket to move the shifter back six inches. Used a piece of aluminum tubing to lengthen the shifter rod tube. This was a low mileage (20k) trans I removed from a wreck back in the 1980s, works great.

More details are shown on my Cardomain page.
Attached Thumbnails Shortening gearbox-modified-shifter.jpg   Shortening gearbox-transmission-mount.jpg   Shortening gearbox-mazdashifter.jpg  
Old 11-28-10 | 06:15 AM
  #33  
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Originally Posted by stilettoman
Not every swap has the same requirements. I needed to move the shifter BACK exactly six inches for my German RX-7, and the attached photo shows how I did it. I took six inches of a scrap shifter rod and welded it to my 83 RX-7 shifter rod, then made a bracket to move the shifter back six inches. Used a piece of aluminum tubing to lengthen the shifter rod tube. This was a low mileage (20k) trans I removed from a wreck back in the 1980s, works great.

More details are shown on my Cardomain page.
stilettoman wow! thanks for posting this. I was just going to ask about how to extend the shifter back. I'm doing a AT to MT swap in my JC Cosmo and I would like to move the shifter about 3 ~ 3.5 inches back. This really gives me a good idea on how to do it. I used a S5 FC transmission and had to cut a little of trans tunnel.

https://www.rx7club.com/old-school-other-rotary-63/picked-up-92-cosmo-895259/page4/
Old 11-30-10 | 08:37 PM
  #34  
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Hate to hijack the thread but does anyone know where I can get a B2000 shifter? I have a tanny with the tail housing already swapped out but I'm having trouble finding a shift level that fit.
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