Driveshafts: Swap solutions

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This "Swap Solutions" series of Wiki articles is intended to help the customizer, swapper, shade-tree mechanic, or junkyard crawler.
 
This "Swap Solutions" series of Wiki articles is intended to help the customizer, swapper, shade-tree mechanic, or junkyard crawler.
  
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Often an engine or transmission swap requires the driveshaft to be modified. One important part of this is correctly measuring the driveshaft for the correct length.
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[http://www.dennysdriveshaft.com/how_to_measure.html Dennys Driveshafts - How to Measure Correctly]
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==GM 7.5" out 8.5" in==
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A shorter driveshaft is used when the 8.5" rearend is installed in place of the 7.5". The difference is 1 inch. The TH200C, TH250(C), TH350(C) and the TH2004R all used the same length driveshaft.
  
 
==Measure, measure, measure!==
 
==Measure, measure, measure!==
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Countless times I've found myself wishing I had a source to know if this axle will fit that car, how much that ISB Cummins engine weighs, or if a driveshaft already exists that fits my custom install instead of paying to have one fabricated.
 
Countless times I've found myself wishing I had a source to know if this axle will fit that car, how much that ISB Cummins engine weighs, or if a driveshaft already exists that fits my custom install instead of paying to have one fabricated.
  
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This article is for Driveshafts. An often overlooked item, there are a wide variety of driveshafts available that might make short easy work for your swap. While you have yours out, grab a tape measure and let the world know.
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This article is for driveshafts. An often overlooked item, there are a wide variety of driveshafts available that might make short easy work for your swap. While you have yours out, grab a tape measure and let the world know.
  
 
#Driveshaft length, from center of the front U-joint to center of the rear U-joint.
 
#Driveshaft length, from center of the front U-joint to center of the rear U-joint.
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#Tubing material. Most will be steel, but some are aluminum or composite/fiber these days.
 
#Tubing material. Most will be steel, but some are aluminum or composite/fiber these days.
 
#U-joint size, front/rear; 1330? 1350?
 
#U-joint size, front/rear; 1330? 1350?
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#Tranny yoke style.  Is it a slip yoke or fixed? What diameter and spline count? What tranny does it fit?
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#Tranny yoke style.  
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##Is it a slip yoke or fixed?  
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##What diameter and spline count?  
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##What tranny does it fit?
 
#Notes for additional information.
 
#Notes for additional information.
  
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Bolt the rear joint onto the pinion. Slide the front yoke onto the transmission output shaft until it bottoms and will go no further. Now, pull the yoke out 5/8" to 3/4". Measure between the centerlines of the bearing cups on the front and rear joints. This will be the measurement you will give your shop to make your new driveshaft. Give them the front and rear joints and the measurement and they'll make and balance a shaft for you. If you want it to be bulletproof, specify that you want it built with 0.093" tubing. Should you opt for a larger diameter driveshaft, be sure it will clear the floorboards, etc. at full rear end compression.
 
Bolt the rear joint onto the pinion. Slide the front yoke onto the transmission output shaft until it bottoms and will go no further. Now, pull the yoke out 5/8" to 3/4". Measure between the centerlines of the bearing cups on the front and rear joints. This will be the measurement you will give your shop to make your new driveshaft. Give them the front and rear joints and the measurement and they'll make and balance a shaft for you. If you want it to be bulletproof, specify that you want it built with 0.093" tubing. Should you opt for a larger diameter driveshaft, be sure it will clear the floorboards, etc. at full rear end compression.
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==U-joints==
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*1310 series, (aka "small Chevy") has 1.063" diameter caps, 3.219" measured across to lock ring points (1-1/16" x 3-7/32"), uses outside clips. Was OEM for many 1967-74 GM cars.<br>
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{{Note1}}There's also a 1310 "special" U-joint, which has two 1-1/16" and two 1-1/8" caps. Used OE on some Fords and used as an adapter U-joint.
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*1330 series pinion yokes use locating tabs to center the U-joint, has 1.063" diameter caps, 3.625" measured across to lock ring points (1-1/16" x 3-5/8"), uses outside clips. Used on heavy-duty/high performance/big engine applications.
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*GM 3R series is the "inside C-clip", or "inside lock" style. Used ~1975-up. It does not use locating tabs. It has 1.125" diameter caps, 2.5625" measured across caps (1-1/8" x 2-9/16"), aftermarket/replacement U-joints uses inside clips, originals use plastic injection.
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On the 12-bolt, the hardware used to hold the U-joint into the pinion yoke was either two 5/16" U-bolts, or 4 bolts and 2 metal straps. Both styles were used on original equipment applications. The U-bolts are the preferred method, if for no other reason than if either were to fail the U-bolt type can be easily replaced while the strap type might break off the bolt inside the yoke, making extraction difficult.
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[[File:U-jnt girdle.jpg|right|200px]]
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The yokes may be different for straps or U-bolts. The strap yoke (if smaller) can be drilled out to use U-bolts, but in some cases this leaves too little metal around the holes. A better approach is to use a yoke made for U-bolts in the first place.
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U-joint girdles (right) can be used to replace the original hardware. Be sure to match the diameter of the fasteners to the hole size of the yoke.
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==U-joint dimensions==
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<table border="1" cellpadding="2" cellspacing="0">           
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<span style="FONT-SIZE: 10pt">'''Outside Snap Ring-Type U-Joint/Yoke'''</span><tr>             
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<td style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BACKGROUND: #DDDFFF; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><strong><span style="COLOR: #000000; FONT-FAMILY: Arial">CAP DIAMETER</span></strong></div>              </td>             
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<td style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BACKGROUND: #DDDFFF; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><strong><span style="COLOR: #000000; FONT-FAMILY: Arial">WIDTH</span></strong></div>              </td>             
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<td style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BACKGROUND: #DDDFFF; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><strong>SERIES </strong></span></div>              </td>            </tr>           
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<tr>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-1/16"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">3-7/32"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1310</span></div></td></tr>           
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<tr>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-1/16" x 1-1/8"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">3-7/32"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1310 Special*</span></div>
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              </td>            </tr>           
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<tr>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-1/16"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">3-5/8"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1330</span></div>
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              </td>            </tr>           
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<tr>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-1/16" x 1-1/8"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">3-5/8"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1330 Special*</span></div>
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              </td>            </tr>           
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<tr>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-3/16"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">3-5/8"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1350</span></div>
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              </td>            </tr>           
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<tr>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-3/16"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">           
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">4-3/16"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1410</span></div>
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              </td>            </tr>           
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<tr>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-3/8"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">               
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">4-3/16"</span></span></div>              </td>             
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<td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1480</span></div>
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              </td>            </tr>           
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<tr>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">1-3/8"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial"><span style="FONT-SIZE: 10pt">4-31/32"</span></span></div>              </td>             
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<td style="BACKGROUND: #F1F1F1; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center">
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<div><span style="COLOR: #000000; FONT-FAMILY: Arial">1550</span></div>
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              </td>            </tr>          </table>
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'''<nowiki>*</nowiki>'''For 1310 and 1330 "Special" U-joints, two caps are 1-1/8" and the other two caps are 1-1/16" (used on some Ford applications, as well as to mate dissimilar driveshaft yokes to transmission and pinion yokes).
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{{Note1}}If measuring the '''''yoke''''' for width, measure inside the two locating tabs.
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==Resources==
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*[http://www.actionmachineinc.com/ujointmeasuringguide.aspx U-joint measuring guide]
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*[http://www.iedls.com/asp/admin/getFile.asp?RID=10&TID=28&FN=PDF]
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*http://www2.dana.com/pdf/J3311-1-DSSP.pdf
  
 
[[Category:Transmission]]
 
[[Category:Transmission]]
 
[[Category:Rearend]]
 
[[Category:Rearend]]
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[[Category:Undeveloped articles]]
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[[Category:Undeveloped Transmission articles]]
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[[Category:Undeveloped Rearend articles]]

Latest revision as of 12:43, 19 December 2022

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