Transmission to Engine Stand?

N882928 · N882928's Garage

Can anyone tell me if there is anything special needed to mount a 915 to an engine stand? Can you use a generic yoke like the one that came with the stand or do you have to use the Porsche style half moon yoke? The reason I ask is the mounting holes through the trans. case are only M10. Measuring the thickness of the trans. case and the generic yoke that came with the stand I would need 6 in long M10s. The holes on the generic yoke are much bigger than M10. I was not sure if this could lead to a bolt breaking at the yoke? Obviously I don't want the trans. to fall and I'm not sure how long it will take me to rebuild it. It could be awhile... Any advice would be appreciated. Thanks.

Peter Zimmermann · 02-21-2013, 03:52 PM

The 915 weighs about 125 pounds, so check your stand's specs to be sure that's OK. A couple of pictures of what you're working with would help!

HFR_Racer · HFR_Racer's Garage

I've used a generic engine stand for my 930 trans several times. A transmission doesn't weight much.

N882928 · N882928's Garage

Pete, it's not the stand that worries me. It's says its good to 1250 lbs. If you look at the pic of the yoke that came with it, it has long tubes that mount to the engine or in this case the trans. Because I would have to use long M10s to go through these tubes and the trans. case I wonder if the bolts would break because they would not be supported by the yoke tubes very well because of the larger dia. tubes and the bolts would be much longer than they are thick. Does this make any sense?

Guardsred911 · 02-21-2013, 06:13 PM

I used the same one to rebuild a 1969 Land Rover Series 2A... I used totally ghetto-fabbed bolts to attach it, and only 3 of them, not the 4. I also used undersized ones (don't ask why). It weighed about 600 lbs with everything on it... I think you'll be fine...

toddu · 02-21-2013, 06:55 PM

Would P201 be able to be used??

Todd

N882928 · N882928's Garage

Thanks. I just wanted to be sure this set up would be safe. I'm sure you could use the porsche yoke but I'll have enough money in the trans. rebuild...

jeffs9146 · 02-22-2013, 12:05 PM

Quote:

Originally Posted by N882928

Can anyone tell me if there is anything special needed to mount a 915 to an engine stand? Can you use a generic yoke like the one that came with the stand or do you have to use the Porsche style half moon yoke? The reason I ask is the mounting holes through the trans. case are only M10. Measuring the thickness of the trans. case and the generic yoke that came with the stand I would need 6 in long M10s. The holes on the generic yoke are much bigger than M10. I was not sure if this could lead to a bolt breaking at the yoke? Obviously I don't want the trans. to fall and I'm not sure how long it will take me to rebuild it. It could be awhile... Any advice would be appreciated. Thanks.

In my opinion it would be easier to rebuild the trans with it sitting on a couple of blocks of wood! You would then pull the stack and work with it on the bench. When done you drop the stack back into the case that is sitting on the blocks!

Trying to slide the stack in to a case mounted sideways on an engine stand would be risky and a pain in the a$$!

jeffs9146 · 02-22-2013, 12:13 PM

Here is a photo of a bunch of us doing a transmission rebuild clinic at my house!

sjf911 · sjf911's Garage

Quote:

Originally Posted by jeffs9146

In my opinion it would be easier to rebuild the trans with it sitting on a couple of blocks of wood! You would then pull the stack and work with it on the bench. When done you drop the stack back into the case that is sitting on the blocks!

Trying to slide the stack in to a case mounted sideways on an engine stand would be risky and a pain in the a$$!

I've done it both ways and have to say that I prefer it on the engine stand. It really is no big deal getting the gear stacks in sideways. Once they begin to engage the final drive housing, they don't fall out easily.

jeffs9146 · 02-22-2013, 12:31 PM

There seems to me to be less risk of scratching or bumping a tooth when you are dropping it in as opposed to sliding it in!

I guess it is just me!

sjf911 · sjf911's Garage

LOL, I would think it's a preference thing. The advantage of dropping them in is that you don't have to chase the engine stand around the shop as you are trying to push the stacks in and you have gravity to assist you.

Peter Zimmermann · 02:03 PM

The easy way to install the gear stack, with the trans on a stand, is to engage the pinion bearing race with about 1/2 - 2/3 of the pinion head, and have the 1/2 slider fork engaged. You might think that the P/S will fall out, but it won't! The pinion shaft will just hang there while you coax the M/S into position, then push the entire stack home into its bearings. Also, you can't adjust the shift forks unless the gear stack is horizontal, and the sliders can find their natural center between gears.

I don't think that you have any worries about bolt breakage, just use large flat washers (we have a store called Budget Bolt that sells washers that are large OD, and are 1-2 mm thick) where the bolt is loose in the hole, and snug them down. Remember, with the factory yoke you're only using two bolts, not four, and it's a perfect solution.

I don't have to "chase" my stand, it doesn't have wheels!