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Jul 21st, 2025 | | 
#42637 11/25/2003 8:58 PM | Joined: Jun 2002 Posts: 150 'Bolter | | 'Bolter Joined: Jun 2002 Posts: 150 | Hello all...
I need to bring the rpm's down in my '65, AND save my left knee.
The truck has the stock rear and a non stock granny 4 speed w/PTO.
Either I swap the rear gears and put a TH350 in,
or go with a 700R4.
Thoughts, hints, drive shaft interchange part numbers?
Thanks,
Mike | | |
#42638 11/26/2003 1:57 AM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | I put 700R4 in my 64, love it, used an 85 Silverado driveshaft, crossmember from a 69 C10 auto, stock auto column & linkage. Wired it for 4th lockup only thru a vacuum switch, with stock 350 & Qjet gets over 16mpg. Brian | | |
#42639 11/26/2003 3:54 AM | Joined: Jan 2001 Posts: 687 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 687 | Overdrive is the best way to go, in my opinion. May be a little more work than swapping the ring and pinion, but once the work is done there are nothing but advantages. You get 4 gears and keep a good pulling rear end, when you need it. With the TH350 and a 3.08 gear your take off acceleration will not be as good as the 700R4/stock low rear end. And you won't have as much gearing to accelerate or pass in second gear versus third in the overdrive.
-ftyler | | |
#42640 11/26/2003 5:15 AM | Joined: Oct 2003 Posts: 38 Member | | Member Joined: Oct 2003 Posts: 38 | Question here for "64fleetside". Did you have to cut down the driveshaft or did it bolt in?
I have put a 700r4 in my '66 and am looking for a driveshaft.
Be Happy and Live a Good life filled with Love and Happiness.
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#42641 11/26/2003 8:32 PM | Joined: Jun 2002 Posts: 150 'Bolter | | 'Bolter Joined: Jun 2002 Posts: 150 | 64fleetside.
Thanks for the info.
If I remember right, the 700r4 will burn up if not wired to lock up.
Do you have more info on the vacuum switch connection?
Are the '85 chevies the same wheel base as ours?
Also, the rear engine/bellhousing mounts need to come out, right?
Thanks,
Mike | | |
#42642 11/28/2003 3:59 AM | Joined: Nov 2003 Posts: 6 Member | | Member Joined: Nov 2003 Posts: 6 | For a killer 700R4 Lockup Kit go to 700R4.COM.I put one in my 63 shortbed and it worked out great.They have areally detailed website with lots of info.I paid less than 80 bucks for the whole setup.It took me an hour to install on my truck,it was easy,check it out. | | |
#42643 11/28/2003 4:34 AM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | I used a vacuum switch for 85 1/2 ton Silverado also, used a diagram from www.montecarloss.com to wire it, had to remove pan & cut a couple wires & reconnect another one or two. Cost next to nothing. The driveshaft I used supposedly came from shortbed Silverado of similar vintage, I didn't even cut it, fit fine(still not sure how that happened). I used a Q-jet baseplate & throttle bracket TV cable all for 85 1/2 ton Silverado so adjustment was easy, shifts good. Brian | | |
#42644 12/01/2003 9:08 PM | Joined: Jun 2002 Posts: 150 'Bolter | | 'Bolter Joined: Jun 2002 Posts: 150 | Thanks for all the info.
Sorry for the delay, just REAL busy with all kinds of things.
More as the project begins.
Mike | | |
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