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<div>Chuck, </div>
<div> </div>
<div>I did this transmission conversion in 2011. 1948 Chevy 3600 truck; 1954 235 engine with OD transmission I believe to be from 1959. </div>
<div>Spend some time and get familiar with the electronics and control of the OD and you'll find it a VERY cool addition to your truck and driving experience. </div>
<div> </div>
<div>Some answers below...</div>
<div> </div>
<div>1 <br>
Sliding yoke compatible with 27 spline output shaft<br>
and 57 U-joint. </div>
<div> </div>
<div>Mine was a 16 spline yoke that I believe to be same as a PowerGlide yoke. Cline Company (Greenville, SC) made my new drive shaft complete with new yokes ($290). They can source whatever yoke you need. Recommend you replace seal along with new yoke. <br>
<br>
2 <br>
Overdrive relay </div>
<div> </div>
<div>I would have to re-check but recall just an off the shelf parts store item. <br>
<br>
3 <br>
Overdrive kickdown switch </div>
<div> </div>
<div>I chose a manual rocker switch mounted on a custom panel in my truck with the cable. Added a tach, volt, and OP gauge just for looks. That way, I am in total control. I can go WOT without kickdown or disable OD in advance of a hill or traffic. The manual switch along with the governor makes for cool in-town driving - 1st becomes essentially synchronized, then 2nd then 2nd Over. <br>
<br>
4 <br>
Overdrive control cable </div>
<div> </div>
<div>Use a choke cable from Tractor Supply or similar. This item is important as the transmission is an overrunning system without the cable pulled. <br>
<br>
5 <br>
Were shift rod modifications required? </div>
<div> </div>
<div>I had to use the shift links from my old transmission and some creativity. <br>
<br>
6 <br>
Any problem using the lower clear mounting holes<br>
with the 1957 Bell housing? </div>
<div> </div>
<div>Not sure I understand or this may be different than the set-up I had - everything bolted up fine for mine but I needed a new drive shaft as the original was split (half enclosed; half open). <br>
<br>
7 <br>
Speedometer conversion gear(s)</div>
<div> </div>
<div>Should not need as you are not changing rear-end ratio. <br>
<br>
<br>
Emory Hodges</div>
<div><a href="mailto:EEHodges@aol.com">EEHodges@aol.com</a></div>
<div> </div>
<div> </div>
<div> </div>
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Subject: Oletrucks Digest, Vol 7, Issue 23<br>
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Today's Topics:<br>
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1. OVERDRIVE CONVERSION (Chuck Smith)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Sat, 5 Dec 2015 14:29:08 -0700<br>
From: Chuck Smith <<a href="mailto:saltrider@hotmail.com">saltrider@hotmail.com</a>><br>
To: "<a href="mailto:oletrucks@autox.team.net">oletrucks@autox.team.net</a>" <<a href="mailto:oletrucks@autox.team.net">oletrucks@autox.team.net</a>><br>
Subject: [Oletrucks] OVERDRIVE CONVERSION<br>
Message-ID: <<a href="mailto:BLU179-W83A693816EAB1A5EC5AB9BAD0B0@phx.gbl">BLU179-W83A693816EAB1A5EC5AB9BAD0B0@phx.gbl</a>><br>
Content-Type: text/plain; charset="windows-1252"<br>
<br>
<br>
<br>
I have a 3 speed Saginaw Transmission with a Borg-Warner OD tail<br>
section. Xmission # is 3858986 and<br>
overdrive is R10Q-1. Date codes appear<br>
to be late 66 ? early 67. I?d like to<br>
adapt it to my 1957 Chev pickup with original 235 engine, column 3 speed. Internet sources identify this transmission<br>
combo as having been used in 66 ? 69 Chevrolet and Chevelle cars. The Saginaw (front) portion is much longer<br>
than on the 1957 but overall length looks the same. The input looks the same as the 1957 but the<br>
lower mounting holes are clear, not threaded. <br>
The output shaft is a finer spline: <br>
27 versus the 16 spline 1957 output. <br>
The rear OD housing section is larger in<br>
diameter than the 1957 tailshaft housing but I believe there is plenty of space<br>
underneath the floorboard. The shifter<br>
shaft locations look close to the 1957 3 speed. <br>
<br>
<br>
<br>
<br>
Has anyone made this conversion? <br>
I?m specifically interested in identifying (preferably by model or part<br>
number): <br>
<br>
1 <br>
Sliding yoke compatible with 27 spline output shaft<br>
and 57 U-joint. <br>
<br>
2 <br>
Overdrive relay <br>
<br>
3 <br>
Overdrive kickdown switch <br>
<br>
4 <br>
Overdrive control cable <br>
<br>
5 <br>
Were shift rod modifications required? <br>
<br>
6 <br>
Any problem using the lower clear mounting holes<br>
with the 1957 Bell housing? <br>
<br>
7 <br>
Speedometer conversion gear(s)<br>
<br>
<br>
<br>
Chuck<br>
<br>
<br>
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