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Posted by: doobie123 Oct 4 2022, 01:47 PM

hi ya'll
I'm working on a 1975 914, 1.8, 5 Spd
it needs a clutch so I removed the engine and trans so I could give them both a bath and service the engine bay too.
while cleaning the trans I discovered what you see in the attached photos. on top of a big blob of silicone caulk was a smaller sized but no less of a blob of JB weld. underneath that was what is shown in the pic of what looks like a washer and a brass disc. they are also spinning in that hole
the location of this "fix" is at he very back of the trans where the trans bolts to a cross brace which bolts to the the frame, just above the speedo drive in the center of what looks like a cover separate but bolted to the trans case. it was obvious it was put there to stop a leak as that area was covered with dirt and grease.
so my questions are what should that cover look like? what is the correct fix? can that cover just be removed for inspection/repair/replacement without having to dismantle the trans? also, any info anyone has on something like this.
thanks in advance.

Posted by: doobie123 Oct 4 2022, 01:50 PM

just noticed I posted the pic upside-down

Posted by: 914andy Oct 4 2022, 02:07 PM

Been awhile since I've been into one....but it looks like someone tried to put it back together "wrong" and used a hammer to try and seat it. Then the shaft punched a hole in the housing. Should be able to find a used "end cap" and hope nothing else was damaged

Andy

Posted by: mgphoto Oct 4 2022, 03:28 PM

You need to replace the rear cover, I think that is the shift rod coming out the back cover.





Part number depends on /6 /4 early or /4 late

Posted by: wonkipop Oct 4 2022, 04:16 PM

dome bump in casting has been shattered off.
for reasons noted above.



edit

noticed something interesting.
part # on your casting is 914 301 302 00
parts catalogue says 914 301 032 00
can't easily see the part number cast into mine -up there with muffler bracket in the way.
another typo in the parts catalogue?

Posted by: doobie123 Oct 4 2022, 06:47 PM

thanks for the replies. will that case back be a straight remove and replace assuming there is no other damage?
interesting about the #s. i'll be calling auto atlanta for a replacement. i'll post anything i learn on that.

Posted by: wonkipop Oct 4 2022, 11:04 PM

just stuck my head up in there on mine.
same part # as you. third group of numbers is 302 like your casting.
its a 74 1.8

here is PET catalogue.
another typo to add to others that have been found.

Posted by: sportlicherFahrer Oct 5 2022, 07:25 AM

Had a similar issue once. At some point someone tried to "torque" the the bolt that has the speedo gear in it to 80(?) ft lbs with a chisel. It backed out, and the trans effectively used the speedo gear to bore a hole in the cover while I was driving ~40mph. Talk about a mess to clean up...

I'd anticipate needing the aforementioned bolt with speedo gear in addition to the cover, and would try contacting the good @http://www.914world.com/bbs2/index.php?showuser=1372 regarding good used parts and any info needed to fix it up. His website is https://www.evilwerks.com/

Posted by: doobie123 Oct 5 2022, 03:56 PM

ok a bit of an update. took the back cover off and the attached pic shows what came with it. part of the speed o drive and a set of gears.
i'm not sure how to remove them. i can see what looks like a pin but i'm not sure if banging that out will do the trick and also, which way will it come out?
another concern is the needle bearings on the end of the gear. are those gonna go flying if im banging on the cover.
thanks for all the past help and i hope your still following along/Users/ginger/Desktop/IMG-2617.jpg

Posted by: doobie123 Oct 5 2022, 04:00 PM

ok hers the pic, sorry

Posted by: brant Oct 5 2022, 05:09 PM

happened to me also once....
the trans had been rebuilt... the large nut on the mainshaft loosened up or wasn't torqued correctly....

during the drive it allowed the stack to slide backwards... drilled the brass speedo gear through the back cover... would shift in 2 gears at once, due to the stack shifting back and forth...


to the original poster...
those gears (including the needle bearing) will all lift out... or fall out if you turn the cover over....

lift them out... note the order...
put them into your new to you... replacement cover.

the gasket for that cover is easily available.
it does not change the diff depth.. so just bolt it on with a new gasket.


brant

Posted by: doobie123 Oct 5 2022, 05:47 PM

hey brant, thanks for the info. so those gears will just slide off the shaft and then the shaft comes out? also on the speedo drive in the case, i found the tapered bolt. is that the only thing holding the drive in the case?
you also said that in your experience, a bolt had come loose. how would i check mine?
i'm pretty well out of my depth with transmissions so any info would be great.

Posted by: sportlicherFahrer Oct 5 2022, 07:35 PM

Gears slide off the shaft, and the shaft stays in the cover. Replacement cover should have the shaft already.

Tapered bolt on the outside of the cover and a bit of friction should be the only thing holding in that portion of the speedo drive. There is a replacement available that has 2 O-rings to prevent leakage. https://914rubber.com/speedometer-drive-gear-guide-bushing-kit-1-1

Bolt in question of coming loose is located in the end of the gear stack on the transmission. The speedo gear is attached in the end of it with a roll pin. Believe the head if the bolt is 30mm. Can be seen in http://www.914world.com/bbs2/index.php?s=&showtopic=40904&view=findpost&p=532490 being held in Dave's(DNHunt) hand. Requires a deep socket to reach the head past the speedo gear. Check out the rest of his thread for a rough overview of how the parts you're working with go back together.

Posted by: 930cabman Oct 7 2022, 12:03 PM

Over a half century many things can happen, including DAPO's ( and mechanic's) who sometimes in desperation do a bailing wire repair to get them home and never gets corrected properly.