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| | | | Joined: Nov 2012 Posts: 20 New Guy | | New Guy Joined: Nov 2012 Posts: 20 | I'm going to be pulling and rebuilding the 235 in my '50. At the same time I want to yank the 3 speed out and replace it with an auto. Whats the best trans for that? Gonna be a cruiser on all types of roads, rural and highway. I'm not opposed to changing the rear to make it work. I want it to have some get up and go, but also be economic to an extent. Waiting for your suggestions.
Eric
Last edited by Splib; 01/24/2013 4:37 PM.
1950 3100 all original for now
| | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | 700R4 is what you want, but it will take changing to an open driveline
Bill | | | | | Joined: Nov 2012 Posts: 20 New Guy | | New Guy Joined: Nov 2012 Posts: 20 | That's what I was lookin at. Maybe do a 10 or 12 bolt rear. Any specific year 700R4?
1950 3100 all original for now
| | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | they were used about 82-92, and I've heard the later half were somewhat improved, but they're all the same gearing AFAIK .... for the rear you might investigate using a center section from a 55-59, I'm not sure if you need the axles as well, some of the AD series folks here could expand on that - you still need to weld up the 'pivots' on the torque tube rear, but it might make an easier change
Bill | | | | | Joined: Nov 2012 Posts: 20 New Guy | | New Guy Joined: Nov 2012 Posts: 20 | I assume they will bolt right up? Thanks for the info.
Eric
Last edited by Splib; 01/24/2013 6:38 PM.
1950 3100 all original for now
| | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | the rear gear will bolt in, not sure about the trans on the 235, but someone will know, others have done it
Bill | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | You'll want the '85-'93, sourced from a full size truck, Caprice/Impala, or from an S10 with the 4.3 V6 option. All of those should work fine the available adapers. The '82-'84s should be avoided, unless a full rebuild is done first, including a pump replacement. The early 700R4 has a weak pump, and was known to lose pressure when in overdive. The later pump solves that issue. The '94 and newer (also known as the 4L60E/4L65E) are electronically controlled, and may not be desirable for use with an older engine.
Bill Burmeister
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