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Driveshaft interchangeability?


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2002 Impreza Outback Sport. 

As posted previously in a prior post, i have a shutter upon release of the clutch from a dead stop, and the source has yet to located. Literally the only thing yet to be replaced is the driveline. 

My driveline upon visual inspection looks 100% okay. 

But after changing the motor, transmission,(yes new clutch and flywheel) rear diff and mounts and everything in between I feel it needs to be done just to eliminate it as a potential source. 

and due to their moderately high price tag and the fact that it may not even solve my problem I'm looking for a used one.

So my question is are they all the same? 

i think turbos get a slightly larger diameter than non. And the automatics are a different lengths. 

But is that it or do they differ by model as well??  

is there different splines on the input shaft end??.

Am I safe in assuming that any wrx, legacy, or Forester up to 2006 ish with a 5mt will be compatible??

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On a forester, everything is lifted an inch vs impreza chassis.  If you had a forester body and put the impreza shaft in, you can put washers to lower the mount point.  Not sure if anyone's done the reverse.

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Legacy chassis has a longer wheelbase, and therefore a longer driveshaft.

There is no difference in carrier height between Legacy and Outback. I would assume none between Impreza/Forester, or that it would be negligible, but I haven't played with Imprezas at all.

 

Any impreza, 93-07 with the same transmission will definitely work. There are some differences in them (older ones have 3 Ujoints, newer have a DOJ in the center, etc.), but they are interchangeable.

They all use the same Ujoint, so there isn't a heavier duty factory option.

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On 2/5/2022 at 12:43 AM, nvu said:

On a forester, everything is lifted an inch vs impreza chassis.  If you had a forester body and put the impreza shaft in, you can put washers to lower the mount point.  Not sure if anyone's done the reverse.

I have noticed that. My motor , trans and rear diff were all from Foresters.  Thank for the info

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On 2/5/2022 at 8:53 AM, Numbchux said:

Legacy chassis has a longer wheelbase, and therefore a longer driveshaft.

There is no difference in carrier height between Legacy and Outback. I would assume none between Impreza/Forester, or that it would be negligible, but I haven't played with Imprezas at all.

 

Any impreza, 93-07 with the same transmission will definitely work. There are some differences in them (older ones have 3 Ujoints, newer have a DOJ in the center, etc.), but they are interchangeable.

They all use the same Ujoint, so there isn't a heavier duty factory option.

I have 2002 Impreza Outback Sport, 2.5L 5mt

Potential donor is a 2004 Impreza Wagon, 2.5L TS 5mt

They are identical cars except one is green !! HaHa

Went to the parts store websites and look for driveshafts for each vehicle. They come up with different part numbers for each. 

I'd it just a slight variation but still usable??

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Okay well the best way to find out I guess is to just stop second guessing myself and go pull the drive shaft off the donor. 

I'll make sure to take my tape measure this time along with a poor sketch of my current setups measurements. 

Thank you all for the  info ...much appreciated. 

Will follow up with my results

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So an 04 Impreza outback even though completely different part numbers have identical drive shaft assemblies as a 2002 Impreza outback sport

This I know for a fact. 

unfortunately it did not help my shutter problem at all

On 2/5/2022 at 8:53 AM, Numbchux said:

Legacy chassis has a longer wheelbase, and therefore a longer driveshaft.

There is no difference in carrier height between Legacy and Outback. I would assume none between Impreza/Forester, or that it would be negligible, but I haven't played with Imprezas at all.

 

Any impreza, 93-07 with the same transmission will definitely work. There are some differences in them (older ones have 3 Ujoints, newer have a DOJ in the center, etc.), but they are interchangeable.

They all use the same Ujoint, so there isn't a heavier duty factory option.

So an 04 Impreza outback even though completely different part numbers have identical drive shaft assemblies as a 2002 Impreza outback sport

This I know for a fact. 

unfortunately it did not help my shutter problem at all.

please see my other post  tittled "Feels like i have no motor mounts at all"

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