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Fixing the old truck

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Joined: Aug 2019
Posts: 80
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Jim C. Blue
Jim C. Blue
A Offline
Joined: Aug 2019
Posts: 80
I was out helping someone, and they had this old '76 Chevy C60 bus. Curious, I had a look inside and was reminded about old truck 5 speeds. However, the first gear was marked "L". I've heard of trucks all the way back to the 40's having 5 speeds, but have any of you ever experienced them? Like that bus, is it more of a regular 4 speed with extra low 1st?


Alexander's Automotive Assortment
  • 1953 GMC 9700 3-ton**
  • 1978 Plymouth Arrow
  • 1980 Jeep J10 Cargo Truck
  • 1985 Red Wagon Trailer (for cars)
  • 1986 Toyota Tercel Wagon 4wd

**(9700 in Canada or 450 in USA.)
Joined: Feb 2004
Posts: 28,674
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Kettle Custodian (pot stirrer)
Kettle Custodian (pot stirrer)
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Joined: Feb 2004
Posts: 28,674
I believe the shift pattern on some of the older Clark transmissions used "L" to indicate granny gear. It's possible that the 1-4 gears are all synchronized, with L and R being a straight cut spur gear that serves as both ratios, with an idler for reverse. That's how the SM-420 does it. 2nd. gear in a 420 can be selected without coming to a full stop, which gives a driver more options than the 3 speed does.
Jerry


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