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Topic: Drive shaft length (Read 395 times)
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5258
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Fixing to change out the punny 7 1/4 rear and drop in a 8 3/4, running a four speed, Does anyone know what the drive shaft length will be needed for the swap. I know my current length will not work but I have cut and welded one before so the work would not be an issue, trying to get idea for what the length diference is.
Thanks
5258
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5258 Performance Shelbyville, Tennessee "Where the MOPAR factory built and race ready hotrods live again"
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Jim_Lusk
Official BS King
Global Moderator
BBD God
 Offline
Posts: 5058
A-bodies since 1978, this one since 1983
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Since every car is different I like to measure for mine. Put the yoke all the way in the transmission and with the suspension loaded measure center to center on the yokes. Subtract 3/4" and you'll be good.
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7903 posts on old board.
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sunsetdart
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When you do the measuring, make sure ALL the weight is on all 4 tires, if you don't the shaft will not fit.
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bOb shingler
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When you do the measuring, make sure ALL the weight is on all 4 tires, if you don't the shaft will not fit.
it'll be the measurement from the center of the rear end yoke to the seal rim on the trans less 3 1/2". |
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"bOb Built" (no matter how many times it takes)  |
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doug 371
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factory service manuals show the stock lengths...if u need length for a dart i can help but no manual for a duster
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5258
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Yes need for a 4 speed / 8 3/4 69 dart combo.
Thanks
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5258 Performance Shelbyville, Tennessee "Where the MOPAR factory built and race ready hotrods live again"
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brg1966
Full Member
Offline
Posts: 429
It's still the "stupid black car"
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For a 4 speed and 8-3/4 the length is 48.6"
An 340 and Big Block, 727 and 8-3/4 length is 44.88
This is from a 1968 plymouth service manual
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 "The Stupid Black Car" |
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Small Block
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Like Jim said: Don't forget the 3/4". I put it all together and haul it to the driveline shop and let em measure it thenselves and then they fabricate it.
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doug 371
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For a 4 speed and 8-3/4 the length is 48.6"
An 340 and Big Block, 727 and 8-3/4 length is 44.88
This is from a 1968 plymouth service manual
he needs the info for a dart not a plymouth...my dodge manual says 51.53" |
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