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Mod | | | Forums66 Topics128,093 Posts1,056,474 Members48,444 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2012 Posts: 46 'Bolter | | 'Bolter Joined: Feb 2012 Posts: 46 | Ive got 52 3100 with a 235 from a 1960 chevy.. Daily driver, The clutch is worn out and the trans is tired. Im entertaining the idea of putting in a automatic trans,this would allow me to drive my truck all the time as my knees are wornout also. I have the transmission and I have a 6 lug rear diff to swap. ( not sure of ratio yet) Several questions. 1) good idea?
2) what gear ratio should i be looking for inthe rear end?Would really like to keep up with traffic on the highway,65 is plenty.
3) where can i get the adapter? Or are there other options?
Thanks, Oldblue48 | | | | | Joined: Aug 2012 Posts: 566 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 566 | I am not sure exactly what rear end you have but its probably an eaton HO 33 which has a gear ratio of 3.90:1 I have a 56 1/2 or 3100 with a 235 an what I am planning on doing is rebuilding the 235 motor keeping the original 4 spd which is a SM 420 transmission. I also have 3.90:1 eaton HO33 rear end. I know of a company in Casa Grande, AZ called Patrick's that have a kit that will fit into your rear end with 3.38:1 gears which will get you speeds on freeway of 70MPH. Thats what I will do to mine. Ifyou are looking to put a auto transmission OD will help you. There is another company called Advanced Adapters Inc. that was going to supply me with an adapter if i ever decided to put a v-8 in mine Hope that helps. call Patricks they can help he help me decide on what to do.
"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen 56 Chevy 3100 | | | | | Joined: Sep 2006 Posts: 2,393 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 2,393 | www.stoveboltengineco.com sells the trans adapter.
Drew
| | | | | Joined: Sep 2003 Posts: 1,820 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 1,820 | Tom (Stovebolt Engineering Co.) has said he was going to stop producing and selling the adapter mating an automatic to a 235-261.
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.Operators are standing by to take your calls! Now cruising in the Passing Lane | | | | | Joined: Sep 2006 Posts: 2,393 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 2,393 | Tom (Stovebolt Engineering Co.) has said he was going to stop producing and selling the adapter mating an automatic to a 235-261. He currently has some in stock.
Drew
| | | | | Joined: Nov 2001 Posts: 1,519 'Bolter | | 'Bolter Joined: Nov 2001 Posts: 1,519 | | | |
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