Transmission Question

[71gold]

I have decided to install a Wevo XT-328 trans side cover…( beefed up for 2.5 torque)
Having never worked on a trans before ( maybe the only part I never restored or worked on)
My question is whats involved in removing the original and installing this new side cover
Special tools, process etc …
My transmission was rebuilt 2years ago and has not been installed yet so its all accessible.
Thanks for guidance
Frank

[catelluseng]

Frank, you need to reestablish differential carrier bearing preload and ring-to-pinion backlash. Both are pretty well described in the factory WSM. Let me know if you have any questions, though.

You should need to fiddle with only the S1 (ring gear side) shim, since you are replacing only the cover plate. Measuring preload precisely isn't possible with the ring gear on the differential, because you'll get drag from the pinion shaft bearings. However, I suspect that if you get the backlash right, you will have the shimming also correct for preload. Alternatively, you could measure the as-is turning torque (original cover plate) and, assuming that was done correctly, look to reproduce it with the new cover plate.

[71gold]

Kevin
Thanks for providing a great overview of process …
Now to get after it

[911quest]

Make sure you get the correct bearing. The aftermarket side covers use a diffent bearing.

[catelluseng]

Make sure you get the correct bearing. The aftermarket side covers use a diffent bearing.

Good point! They use the 90 mm "930" bearing rather than the original 80 x 50 mm bearing.

[Richy]

What transmission do you have ? I think the side cover pop-off value is more meaningful than the preload torque . New or used bearings are not the same as bearings from 50 years ago , Chris7 [Rest In Peace] thought the same thing .
If the manuel preload torque values are used with new bearings , the preload will be too much .

[71gold]

Richy
Mine is late 70 …7701268
What is suggestion for preload torque value ?
thanks guys

[catelluseng]

What transmission do you have ? I think the side cover pop-off value is more meaningful than the preload torque . New or used bearings are not the same as bearings from 50 years ago , Chris7 [Rest In Peace] thought the same thing .
If the manuel preload torque values are used with new bearings , the preload will be too much .

If you're talking about gapping the cover-to-case, it is unreliable. You cannot get stable, consistent numbers and you're limited to guesswork with feeler blades. Turning torque is reliable, repeatable, and is what the bearing manufacturers recommend. I don't know what you mean by saying bearings are not the same as 50 years ago -- what has changed?

[71gold]

Seems all typical Vendors are out of stock ….
Anyone have access or knows of vendor who has one in stock
Thanks
Frank

[vintage 911]

Frank, If you have a Magnesium case this looks to be in stock. https://californiamotorsports.net/co...t-side-plate-1 Aluminum cases use a different side cover.