915 Transmission Identification

[SuperNovaSS]

The Bronco is a 1967 and is a running truck. I don't plan to sell it. That said, everything is for sale, it is just not on sale. You can come see it when you come to buy the transmission.


Jason

[SuperNovaSS]

I gave this trans a light cleaning and it cleaned up very well. I planned to list it locally for $2500. I sell it here for $2000 since you guys were so awesome with info and insight.


Thanks,

Jason

[SuperNovaSS]

More pictures:

[KTL]

I think we can narrow it down to a 1981 model year? That last picture you posted appears to have an 81 number just below the 915 in the 915.301.301.6R casting number. So if its 1981, then it would probably be a 915.63



Looks like you may have pressure washed it? Make sure to check inside the diff housing that you didn't get any water in there. Old output flange seals can be pretty leaky. So it's not unreasonable to think you could have blown some water past the seals. The same applies to the shift shaft at the nose of the trans because that seal is also notoriously leaky. You also could have blown water past the input shaft seal in the bellhousing. Buyer will also need to polish the tip of the input shaft to let it slip into the flywheel pilot bearing- the rust on there may create some interference.

Another thing worth noting about this trans is that it has the latest side cover. The last iteration of this side cover added more ribbing placed midway in the radial ribs to further reinforce it against flexing.

https://www.wevo.com/Products/TransmissionProducts/WevoTransmissionProducts-External_TransmissionSideCovers.htm


http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/857373-915-diff-housing-cover-84-model-year.html

Also not a bad idea to take off the drain and fill plugs just to ensure they come off. They're a tapered thread (like NPT pipe thread, but metric) and it doesn't take much grunt to overtighten them to make it really tough to get them loose. Plus you can see how much sludge the magnetic drain plug collected.

Not a bad idea to take off the tail cover to get a look at the condition of 5th gear and reverse. It's no more difficult to remove than the side cover. Just be aware there's a pin for the reverse light switch that you need to catch when the tail cover is removed. The pin has a narrow end that is inserted into the hole of the switch. The pin is activated by a roll pin sticking out of the 5th-reverse shift rod. Rather crude but reliable.

[SuperNovaSS]

Thanks for the detailed and informative reply. It was not pressure washed, just carefully degreased. The cover you mention is also darker in color. I believe it’s magnesium. I will likely pop the diff out again to wash off with brake clean and take better pictures. I plan to post on eBay next but wanted to offer it here first.


Thanks again,

Jason

[Matt Monson]

Be sure to lube if it you brakekleen it. It will rust pretty immediately with no oil on it.

[KTL]

Please share what degreaser you used? The trans looks fantastic! I have an '86 on the stand that's really really testing my ability to resist cleaning it while I procrastinate on other things I should be doing in the garage.

[SuperNovaSS]

I used Power Purple(Castrol Superclean) and a nylon brush. Lots of applications and gentle scrubbing.


Thanks,

JAson

[SuperNovaSS]

I also posted the cross member on Ebay starting at $9.99 with no reserve. The auction ends Monday(Tomorrow) night at 7PM Pacific Time and is currently at $9.99. If anyone is after a crossmember or mounts this could be a stellar deal. Here is a link to the listing:

https://www.ebay.com/itm/372264112212


Thanks,

Jason

[KTL]

Originally Posted by SuperNovaSS

I used Power Purple(Castrol Superclean) and a nylon brush. Lots of applications and gentle scrubbing.


Thanks,

JAson

Thanks for sharing. I've heard over the years it's good stuff but hadn't tried it myself. I bought a gallon at Meijer over the weekend

[SuperNovaSS]

Hopefully it works well for you. I like to spray it on full strength, lightly scrub, then cover it to keep the stuff from evaporating. Every 15 minutes I spray again and scrub a bit more then cover. It seems to work best that way.

Also, the transmission sold locally today. Hopefully it is a bolt in transmission for the buyer. It sounded like they were going to roll the dice and install it. I would have done the same thing if I needed one.


Jason

[speeder]

Instead of starting a new one since the 915 experts seemed to be on it. Here is my question; are there any external markings or difference in ID numbers for a factory ltd. slip 915? Specifically a 911SC and newer, if it makes a difference. Thanks.

[Matt Monson]

Originally Posted by speeder

Instead of starting a new one since the 915 experts seemed to be on it. Here is my question; are there any external markings or difference in ID numbers for a factory ltd. slip 915? Specifically a 911SC and newer, if it makes a difference. Thanks.

Yes. They put a "12" between the type number and the serial number.

[speeder]

Originally Posted by Matt Monson

Yes. They put a "12" between the type number and the serial number.

Thank you! I thought there was something but it’s been a while.

[Matt Monson]

Originally Posted by speeder

Thank you! I thought there was something but it’s been a while.

You’re welcome. Glad to see you still playing with them.