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#31412 12/19/2002 1:58 PM | Joined: Oct 2000 Posts: 98 'Bolter | | 'Bolter Joined: Oct 2000 Posts: 98 | I'm curious what your feedback would be concerning the driveline for my truck. What I currently have is a 1966 Chevy c10 with a 250 6 cylinder and a 3 speed on the column. The rear end has 3:73 to 1 gears. I'm looking to lower the RPM's at cruising speed, but still be able to haul a modest load from time to time.
I purchased a 3:08 to 1 rear end that came out of a 1965 Chevy pickup from an ad on this website. Then I purchased a used TH-350 from a member of my truck club. The plan was to swap these in to ease the RPM's at crusing speed.
The problem is that I have been told by some that this would not be a very good setup.
I have considered swapping for either a T-5 transmission or one of the AP N833 4 speed overdrives and keep the 3:73 rearend. Another option is to swap in the 3:08 rearend and get a Sagnaw or Muncie 4 speed transmission.
What do you all think? Pros or cons?
Thanks!
Mike K
Mike Kelley
1966 Chevy C10 SWB - 250 L6/S10 T5
2002 Chevy Ext 1500 4x4
Http://myol66.wordpress.com
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#31413 12/19/2002 6:53 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I wouldn't go any less than a 3.42. 3.08 is pretty high for a low hp engine. Overdrive is a good way to go, you keep your lower gears at startup, and can still cruise on the highway.
Fred
52 3600
69 C-10
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#31414 12/19/2002 10:48 PM | Joined: Nov 2000 Posts: 1,927 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,927 | Mike, my very first pickup bought in 78 was exactly as you described, 66/C10/250/3-spd/3.73 long fleetside. It was a solid, good running/driving, dependable, economical pickup. I made a few small repairs and had it repainted. I could probably still be driving it but I traded it in 81 for a LUV. (I was young.) I agree the 3.08 is pretty steep for the 6, especially with a full load of firewood. OD seems the way to go. Good Luck! :p
Professional Novice
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#31415 12/20/2002 12:14 PM | Joined: Jan 2001 Posts: 662 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 662 | I can vouch for the NP A833. I'm using a 3.42 rear and when I go from 1:1 3rd into .73 4th it almost seems like the engine shut off. I cruise 70 no problem (and when I get off these 45-55MPH roads, then I reckon 80-90 will be breeze too). http://www.chuckthetruck.homestead.com/page12.html | | |
#31416 12/20/2002 3:06 PM | Joined: Jan 2001 Posts: 687 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 687 | Mike,
I have the exact same gearbox as chuckthetruck. I wish you lots of prayers and patience in finding one. They're pretty scarce as it, and the GM bolt pattern version seems even more rare.
Check Ebay often if you choose to go this route and be very patient. I ended up getting one off Ebay, shifter and all. And total costs for me for the tranny, shipping, a rebuild kit and labor for the rebuild has been under $400.
Check your local salvage yards too. If they have them, they'll probably sell for $150 and up.
-ftyler | | |
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