moser 9" ?'s
#1
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Car: 86 iroc
Engine: 383HSR
Transmission: custom 700r
Axle/Gears: moser 9" 3.90
moser 9" ?'s
i have a moser 9" with the alum thru bolted center and 3.89's my question is does this swap require a diff drive shaft? i have my stock one installed and i have a vibration during hard acceleration and highway speeds! i have new u joints. everything is tight except at the yoke where the driveshaft enters the trany you can grab it and wigle it around about a 1/16 of an inch, just enough that you can see a gap in the seal. i think the ds is to short now it has about 1.5 inches showing with weight on the axle
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: moser 9" ?'s
im using a stock length shaft with the same rear and i have no issues, but im running a tko600 manual trans, but its supposed to be the same length as a 700r4/t5
If the rear is centered front to back in the car, and you have 1.5" of the yoke sticking out out of the trans, you need a new driveshaft.
If the rear is centered front to back in the car, and you have 1.5" of the yoke sticking out out of the trans, you need a new driveshaft.
#3
Re: moser 9" ?'s
If you are using the same drive shaft that you had with the 7.5 then it is too short. Which yoke do you have on the 9 inch? If it's a truck yoke then it will be much shorter than the 7.5 was. The car yokes are a little longer, but still not quite long enough.
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Car: 86 iroc
Engine: 383HSR
Transmission: custom 700r
Axle/Gears: moser 9" 3.90
Re: moser 9" ?'s
im not sure if its car or truck. its a moser thru bolted aluminum center section
though. i did reuse the drive shaft
though. i did reuse the drive shaft
Last edited by iroc.86; 03-28-2009 at 06:49 PM.
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Car: 89 GTA
Engine: 5.7L Supercharged
Transmission: T-56
Axle/Gears: Moser 9" 3.70
Re: moser 9" ?'s
Try unbolting the driveshaft from the rear and sliding the yoke in more and see if you still have that problem with the wiggle. Mine is out about a inch and i have no wiggle, it's good and tight.
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: moser 9" ?'s
Proper length is to slide the yoke into the tranny all the way then pull it back out 1". If the u-joint isn't in the diff yoke at that point then the driveshaft is too short or you need a longer diff yoke.
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: moser 9" ?'s
Third gen yokes are not 1310. They're called 3R. Close but not exactly the same.
#12
Re: moser 9" ?'s
That is the short truck yoke, and it's probably a 1350. I recommend that you get a new driveshaft made with 1350 yokes on both ends. Contact the drive shaft manufacturer that you are going to use and ask them how they want the mesurements made. Not all manufacturers use the same measurements. Inland Empire Drive Line is a good one. iedls.com
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