need information on transmission output shaft stripped with tcase input shaft as well

[b jeepin]

hi everyone, back again looking for some tech info. made some progress on finally tearing into the truck to see what happened. i'll list some history on the situation, was out on vacation, driving the truck (1995 lr disco manual trans 3.9) in michigans upper penninsula. we were pulling a very lightweight trailer with dirt bikes on at the time, travelled many miles and had not had any signs of trouble, feelings or noises what so ever. then as we came from the back roads to intersect with the main road we stopped at a stop sign, waited for traffic to clear and then attempted to go. but unfortunately there was no forward motion. all we had was a terrible gringing type of noise. a breif inspection looked like transfer case was not engaging into gear, so attempted to shift and manioulate inkage- no luck! ended up having to cut the trip short, hopped on the dirt bikes and rode down to escanaba to rent a uhaul and trailer. got truck and gear home (grand rapids area, mi). at home i dug a bit deeper and suspected internal transfer case issue due to the fact i could feel the gringind from the t-case, i already pulled all the linkage and checked that as well, removed drive shafts
to find if in gear the output flanges would spin but could be held stopped by hand accompanied by the grinding noise. so today i pulled the transfer case and found the transmission output shaft was stripped as well input at transfer case.
so my question now is whats next? i have spent a little time researching the topic but cant seem to find infor that follows up to the end. i am looking to find out how do you rplace the transmission outout shaft, i have a spare tcase and a spare transmission, but trans not good as a whole- lost 2nd gear. but output shaft may be reuseable as well i think i may trade the whole case or just the single input shaft/gear. has anyone done this, please let me know any infor that may help me get on the road again! thanks in advance, Brad.:elkgrin:

 

[Rocket Ship]

Huh. Sounds like I nailed it.

I think this is the part you need:

http://www.ashcroft-transmissions.co.uk/index.php?act=viewProd&productId=8

Unfortunately, changing the output shaft on the R380 will require an extensive rebuild. Luckily it's a pretty basic box and I'd think any competent mechanic can do it. There is an official Land Rover R380 rebuild manual available on the net.

 

[Antichrist]

Huh. Sounds like I nailed it.

Yeah. I would have thought there would be quite a bit of clunk during shifting leading up to it.

Here's my '95 Disco mainshaft at 265k, which I'm in the process of replacing.

 

[Rocket Ship]

Oh, that's not how I expected it to wear, but of course it makes perfect sense now that I look at it.

There must be some variability on how much different units wear out, and you must have gotten a good one. I doubt that LR would have let out a design that had a 100% failure rate at X number of miles. Oh wait, what am I saying, of course they would. :coffeedrink:

 

[Antichrist]

I'm sure a lot, if not most, has to do with smoothness of shifting. I've seen photos of them with a good bit less mileage than mine with the splines worn almost 1/2 way away. And I'm pretty sure that once there's play, it will accelerate and there is greater and greater clearance and so greater impact.

 

[b jeepin]

thanks for the feeback, i have a spare case and a spare transmission but the trans had lost 2nd gear, does anyone know specifics of
how difficult it would be to replace the transmission output shaft? manuals or guides. like to think im fairly competant but by no means a
mechanic. transmission will be out this weekend regardless just trying to figure the best options from there.
thanks! brad

 

[Rocket Ship]

http://www.roversclub.org/docs/R380_Gearbox_Overhaul_Manual.pdf

 

[proper4wd]

Call Rob Dassler, the zen master yoda of LR transmissions

http://www.southwestrovers.com/


Southwest Rovers (505)-270-8671

 

[Antichrist]

I highly recommend making the gearbox jack adapter as described in the workshop manual. Also get 4 or 5 3/8" long bolts 4 or 6" and cut the heads off to use as guide pins in the flywheel housing to ease removal and especially installation of the gearbox.

 

[Rocket Ship]

Yeah, just don't assume that the center of the adaptor is the CG of the powertrain unit. It isn't. :yikes:

And what was the issue with the drawing Tom? The error. Whatever it was I told you I figured the correct measurement must be, well, that's it. That worked. I don't have record of what it was.

 

[b jeepin]

ok well anyone know a good supplier for internal transmission parts? specifically the transmission output shaft or anyone have used trans?

 

[Rocket Ship]

Yeah, Ashcroft. Shipping from the UK is surprisingly not a lot. It's actually cheaper for me to ship from the UK than it is the US, or even within Canada sometimes.

Lucky8 in MI is also a dealer for Ashcroft. Either way, you'll get what you need.

 

[b jeepin]

ok ill have to get with them, been on hold, need to get moving snow is coming. so busy this time of year thanks again for all the input everyone.

 

[DividingCreek]

Yeah, Ashcroft. Shipping from the UK is surprisingly not a lot. It's actually cheaper for me to ship from the UK than it is the US, or even within Canada sometimes.

Lucky8 in MI is also a dealer for Ashcroft. Either way, you'll get what you need.

Lucky8 is outside Buffalo Ny

 

[Rocket Ship]

Ooops, duh. lol