Started in on my gutbag core this afternoon. I'm going to take my time on this one and make it shiny since there's no pressure. Took a couple pics for folks that haven't been inside one. Hard to believe they've got such a bad reputation---just look at all that cast iron I put my bony hand in there for reference---this ain't no Honda 5-speed Enjoy!

mmmm, pieces....


main cluster....

Countershaft...

 

Thank you for showing us your internal organs.

I have mine at the shop and won't get to see inside, so I appreciate the pictures.

I wanted to do it myself for the experience; but I am under a deadline getting all my ducks in a row so I took it to a Getrag expert.

 

''Thank you for showing us your internal organs.''--you're welcome....I think

From doing my first one, I can say that you need access to a pretty serious press and have to get fairly crafty with said press and several random items around the shop to get the thrust washers on and off the mainshaft--that was a nerve wracking experience that I get to go through again tomorrow while dis-assembling this mainshaft. Aside from that, it's just plain time consuming. And, since it's a Getrag, you want everything to be perfect, 'cause even perfect the old 'rag can only hold so much....what were Stomp's #'s again?

 

Does your getrag have a vent on it somewhere? I have mine going back together now, and am considering drilling a hole in the top cover so the trans has a vent. I had a thread on this but nobody seemed to be able to find it either. I think I own a monday built getrag

Perhaps you can shed light on the subject, or post pics of the vent.

 

my two boys are salivating over the pics G1625S...they LOVE taking things apart.... the problem is in the reassembly...THEN they are nowhere to be found...

i commend you on your bravery....and by the way....i agree with your sentiments with respect to how strong that thing looks...i know wannadiesel has been a proponent of the ragger for some time...i think i see WHY

my 91.5 has a reman getrag in it...and i have NO issues with these boxes whatsoever...i tow a large stock trailer...never a problem...only typical wear like in the shift tower...

i think you could park the HONDA INSIDE the case!!! vs

 

Stillsmokin:Your thread is what got me going on my core I looked for a vent, but could not find one either. However, when looking from the bottom (inside) of the toploader, I could easily see daylight. Plus, the snap-ring setup that holds the shift lever in is by no means air tight, so my guess is that venting could occur through there. I'll take a look with fresh eyes today and see what I come up with.

Vagabonddreamer:I have to admit, I sometimes enjoy tinkering with the truck more than I enjoy driving it! Ok, not quite, but close...I built the tranny in my truck under a lot of pressure---truck was down, shop time was expensive and scheduling was not very timely...I ended up doing most of the assembly/install in a canvas garage on a piece of cardboard in January! Not wanting to repeat that page of my life, I decided to get an early start on this one so I can have it in stock. It seems that the input shaft bearing is the weak link, so I'm going to put most of my research into that aspect of the project. I'll be paying very close attention to bearing pre-load and will hopefully be getting with a bearing 'guy', whatever that means, for advice on how to set pre-load with as much accuracy as possible. Second, I've been thinking about some sort of slinger to increase oiling up top. Just drawing board stuff right now. Even if I put over a grand into this one, I could still do it three times before I was close to 5600 territory as far as price. Anyway, thanks for the comments!
Greg

 

I bought a new tower boot from DC this week as mine was torn, there is a very small slit in the bellows that is visible when flexed. I was pondering that theory of tower venting. Still seems strange as compared to everything else I've ever seen.

I have had another member say his had a traditional vent, there is also a rag on ebay and the picture he has appears to show a vent just ahead of the shift tower? I am starting to think there are 2 designs of the top cover as well as the 2 known case designs.

 

Speaking of input shaft bearings -- am I blind, or did you not post any pics of the input shaft?

You have to get the pre-load within spec, but I think the real problem is oil volume and temperature, so looking at oiling is where I think you will get the best bang for your effort.

My '49 T90 had a sheet-metal channel that wrapped around the front gear on the countershaft on the driver's side, efecctively turning it into a pump -- the oil was supposed to shoot up through the channel onto the input bearing. I never saw this on later model transmissions, and am not sure why they discontinued the feature -- I am guessing it was to save money. I would think about trying to make something like that, rather than just a slinger, as the slinger will add more heat (and reduce efficiency a tiny bit). The ideal thing would be to run a pump to pump oil through a cooler and then return it through the input bearing. . .

 

If you go to http://www.quad4x4.com/ this sight and call Dan he can answar all your questions on these trannies. He also sells kits for the rebuild that come with all the special tools needed, parts and an excellent instructional video that walks you through each step.

 

Hey Alec, how's it going? Sharp eye on the lack of input shaft. I used it as an alignment tool when I put my present tranny in and it got lost somewhere in the mix. It was junk anyway and a new one will be part of the rebuild. I think you're spot-on with the oiling issue being the main concern. Maybe feed an electric pump from the drain hole, run it through a cooler and pump it back in the fill hole? If I could secure some stainless line to the inside of the case, I could run the return oil directly to the bearing in question and spray away...I'd hate to get that complicated with it, but if the pump even did fail, the tranny would just operate as normal...

 

What if you could bolt a gear driven pump, like an oil pump for the engine, to the PTO cover and drive it off the tranny? It would all be internal, unless you wanted a cooler, and it would probably never fail.

 

A better idea yet, Aaron! I happen to have a couple random pto's floating around up at my dad's place. hmmmmm....

 

I get those every once in a while, kind of scary when it happens though.