[EVDL] Tranny/differential alignment help needed

--- Adrian DeLeon <[email protected]> wrote:

<<<snip>>>
> Would it be a big deal to have the top of the bell
> housing 1" higher than
> it originally was? Should I raise the rear end of
> the transmission by 1"
> also?

I remember when I helped a friend put a Ford rearend
in our 1965 Mercedes that he said that we had to have
the angle of the motor/tranny face the same as that of
the differential. This is because u-joints are not
constant velocity joints. The driveline will actually
speed up and slow down while it turns but the drive
shaft from the tranny and the input shaft of the
differential will remain at a constant speed. Given
that, I would say that you should raise both ends of
the tranny the same amount to keep its angle the same.



David D. Nelson
[email protected]



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<m gol wrote:>
> I used a warp 9" into a 86 Toyota Pickup 4x4.
> I had mounted it as best I could, but the tranny is not at its original
> place. I've driven over 6000 miles.
> does your pickup have a transfer case?

How far off is the front of your transmission? The only reference to how
accurate this alignment should be comes from a company selling alignment
kits (http://www.jagsthatrun.com/Pages/Parts_S10-DrvshftKit-Short.html)
They mention 3 degrees as a maximum mismatch - and that it gets worse when
carrying heavy cargo.

No transfer case, it's a vanilla 2WD, 4cyl w/manual steering. On the plus
side, the odometer works with the ECU disconnected. Can't spin the motor
fast enough to know if the speedo still works too...

<Frank John wrote:>
> The 9" in my '94 is pretty close to that linkage [snip]
> If you raise the motor 1" I'd raise the tranny a bit
> but not as much as Roland suggests.
> Driveshaft movement into the tranny is an issue but you also want to
> minimize any change in driveshaft angle as someone else mentioned.

A 1" tranny lift should be OK. It should still leave 1/2" to the bottom of
the truck floor. A picture of your setup would be great!

Roland's warning was that correcting the tranny/diff alignment may cause
the driveshaft to shove too far into the transmission. This can happen if
the transmission (or suspension) is lowered. In my case, raising the
tranny *increases* this distance, so I have to make sure the driveshaft
still has enough "bite" on the transmission output shaft.

Big thanks to everyone for all of your help and advice!

-Adrian




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