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  1. KeithM

    New guy here!

    Thanks everyone! I need to do something with that 305 someday.
  2. KeithM

    Turbo350 w/shift kit slamming 2nd gear

    Well Bingo! I took the spring out of my old trans and when I popped the cover off the new one I found a spring that was cut off an inch shorter! Had fun getting that split ring back on though She shifts real nice now. Nice little bump into second that’s still stronger feeling than stock but not...
  3. KeithM

    Turbo350 w/shift kit slamming 2nd gear

    Thanks Nic! My bet is it has a close to stock converter. Also the speedo reads about 100mph when I'm doing about 40mph. I went and pulled the speedo gear out of my old trans to see if that would fix it and it had a red gear just like my stock one so no change. Not sure what else would cause...
  4. KeithM

    Turbo350 w/shift kit slamming 2nd gear

    Hi, I just had a new trans installed in my 78GMC C15. I know it has a shift kit since it came out of a 67 Nova show car. It had a 3500rpm stall converter which was swapped out for one better suited for an old truck. My question is how can I get it to stop slamming 2nd gear? Would the modulator...
  5. KeithM

    New guy here!

    Thanks for having me. I picked up this 78 GMC last year and of course going about replacing parts and tuning it up. It has the 305 wturbo350 trans. It was never licensed for road use and spent it entire life on a farm and fairgrounds.

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