Subject: [Oletrucks] OVERDRIVE CONVERSION

From: Chuck Smith <[email-masked]>
Date: Sat, 5 Dec 2015 14:29:08 -0700

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=0A=
I have a 3 speed Saginaw Transmission with a Borg-Warner OD tail=0A=
section.  Xmission # is 3858986 and=0A=
overdrive is R10Q-1.  Date codes appear=0A=
to be late 66 =96 early 67.  I=92d like to=0A=
adapt it to my 1957 Chev pickup with original 235 engine=2C column 3 speed.=
  Internet sources identify this transmission=0A=
combo as having been used in 66 =96 69 Chevrolet and Chevelle cars.  The Sa=
ginaw (front) portion is much longer=0A=
than on the 1957 but overall length looks the same.  The input looks the sa=
me as the 1957 but the=0A=
lower mounting holes are clear=2C not threaded. =0A=
The output shaft is a finer spline: =0A=
27 versus the 16 spline 1957 output. =0A=
  The rear OD housing section is larger in=0A=
diameter than the 1957 tailshaft housing but I believe there is plenty of s=
pace=0A=
underneath the floorboard.  The shifter=0A=
shaft locations look close to the 1957 3 speed. =0A=
=0A=
=0A=
 =0A=
=0A=
Has anyone made this conversion? =0A=
I=92m specifically interested in identifying (preferably by model or part=
=0A=
number):  =0A=
=0A=
1        =0A=
Sliding yoke compatible with 27 spline output shaft=0A=
and 57 U-joint.  =0A=
=0A=
2        =0A=
Overdrive relay =0A=
=0A=
3        =0A=
Overdrive kickdown switch =0A=
=0A=
4        =0A=
Overdrive control cable  =0A=
=0A=
5        =0A=
Were shift rod modifications required?  =0A=
=0A=
6        =0A=
Any problem using the lower clear mounting holes=0A=
with the 1957 Bell housing?  =0A=
=0A=
7        =0A=
Speedometer conversion gear(s)=0A=
=0A=
 =0A=
=0A=
Chuck=0A=
=0A=
  		 	   		  =

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<body class=3D'hmmessage'><div dir=3D'ltr'><font face=3D"Times New Roman">=
=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt=3B line-height: =
normal=3B">I have a 3 speed Saginaw Transmission with a Borg-Warner OD tail=
=0A=
section.<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </span>Xmission # is =
3858986 and=0A=
overdrive is R10Q-1.<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </span>Da=
te codes appear=0A=
to be late 66 =96 early 67.<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </=
span>I=92d like to=0A=
adapt it to my 1957 Chev pickup with original 235 engine=2C column 3 speed.=
<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </span>Internet sources ident=
ify this transmission=0A=
combo as having been used in 66 =96 69 Chevrolet and Chevelle cars.<span st=
yle=3D"mso-spacerun: yes=3B">&nbsp=3B </span>The Saginaw (front) portion is=
 much longer=0A=
than on the 1957 but overall length looks the same.<span style=3D"mso-space=
run: yes=3B">&nbsp=3B </span>The input looks the same as the 1957 but the=
=0A=
lower mounting holes are clear=2C not threaded.<span style=3D"mso-spacerun:=
 yes=3B">&nbsp=3B=0A=
</span>The output shaft is a finer spline:<span style=3D"mso-spacerun: yes=
=3B">&nbsp=3B=0A=
</span>27 versus the 16 spline 1957 output.<span style=3D"mso-spacerun: yes=
=3B">&nbsp=3B=0A=
</span><span style=3D"mso-spacerun: yes=3B">&nbsp=3B</span><span style=3D"m=
so-spacerun: yes=3B">&nbsp=3B</span>The rear OD housing section is larger i=
n=0A=
diameter than the 1957 tailshaft housing but I believe there is plenty of s=
pace=0A=
underneath the floorboard.<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </s=
pan>The shifter=0A=
shaft locations look close to the 1957 3 speed.<span style=3D"mso-spacerun:=
 yes=3B">&nbsp=3B=0A=
</span><o:p></o:p></p><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt=3B line-height: =
normal=3B"><o:p>&nbsp=3B</o:p></p><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt=3B line-height: =
normal=3B">Has anyone made this conversion?<span style=3D"mso-spacerun: yes=
=3B">&nbsp=3B=0A=
</span>I=92m specifically interested in identifying (preferably by model or=
 part=0A=
number):<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </span><o:p></o:p></p=
><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">1<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Sliding yoke compatible with 27 spline o=
utput shaft=0A=
and 57 U-joint.<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </span><o:p></=
o:p></p><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">2<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Overdrive relay <o:p></o:p></p><font fac=
e=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">3<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Overdrive kickdown switch <o:p></o:p></p=
><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">4<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Overdrive control cable <span style=3D"m=
so-spacerun: yes=3B">&nbsp=3B</span><o:p></o:p></p><font face=3D"Times New =
Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">5<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Were shift rod modifications required?<s=
pan style=3D"mso-spacerun: yes=3B">&nbsp=3B </span><o:p></o:p></p><font fac=
e=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">6<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Any problem using the lower clear mounti=
ng holes=0A=
with the 1957 Bell housing?<span style=3D"mso-spacerun: yes=3B">&nbsp=3B </=
span><o:p></o:p></p><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt 0.5in=3B line-he=
ight: normal=3B text-indent: -0.25in=3B mso-list: l0 level1 lfo1=3B"><!--[i=
f !supportLists]--><span style=3D"mso-bidi-font-family: Calibri=3B"><span s=
tyle=3D"mso-list: Ignore=3B">7<span style=3D'font: 7pt/normal "Times New Ro=
man"=3B font-size-adjust: none=3B font-stretch: normal=3B'>&nbsp=3B&nbsp=3B=
&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B&nbsp=3B=0A=
</span></span></span><!--[endif]-->Speedometer conversion gear(s)<o:p></o:p=
></p><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt=3B line-height: =
normal=3B"><o:p>&nbsp=3B</o:p></p><font face=3D"Times New Roman">=0A=
=0A=
</font><p class=3D"MsoNormal" style=3D"margin: 0in 0in 0pt=3B line-height: =
normal=3B">Chuck<o:p></o:p></p><font face=3D"Times New Roman">=0A=
=0A=
&nbsp=3B</font> 		 	   		  </div></body>
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