Tranny troubles....

[Rover Addiction]

Ok guys, here's a good one for ya!

And yes, I posted this to another list too if it looks familiar.

I took a look at my tranny output shaft into the LT230 on my D110 and found that it never got the upgrades so the splines are badly worn. This means that I have to either rebuild or replace the tranny before I can put on the underdrive that I'm getting from Ashcroft. :( So... would it be more economical to rebuild it or go ahead and get a complete new tranny to put in and then have a spare to rebuild at my leisure? Also, what about the NV4500 swap that everyone was talking about? Anybody put one between a 300 Tdi and an LT230? Would this be compatable? How about with the underdrive? It basically replaces the first gear in the t-case with a planetary assembly, so it should work so long as the tranny has the same output shaft dimensions.

Thanks for your input!

-John

[Serious One]

Hi John,

You know, I have been down this road (sort of) with the NV4500 at least. Here are my thoughts.

The NV4500 is VERY expensive, expensive to maintain and repair. Getting it to bolt up to a 300tdi bellhousing isn't impossible, but would be a challenge.

IMO, you're better off getting either a rebuilt tranny, or a new one and just bolting it into place. You *might* get a unit from LRNA if indeed the repairs were supposed to have been made and weren't.

One other thing you might consider, since you'll have the whole damn thing torn apart anyway, is to make the center crossmember removable, and to do some maintenance to your LT-230. You could do the spool set-up that several others here are doing, which would give you part time 2wd that is selectable. If you really went crazy, you could even get front hubs that would allow you to put on freewheeling hubs and you could disengage them completely. This is what I'm doing on my 145 project right now.

IF you are a glutton for punishment, you might consider putting in an american transmission with the advance adapters overdrive. The package I'm putting in my 145 is an SM465 and the AO underdrive (they call it the Ranger I think).

I'll end this message with the official pirate salute, just so I don't look like such a newbie!

:flipoff2: :flipoff2: :flipoff2:

Michael

[Rover Addiction]

Here's the plan and my reasoning at this point:

I'm thinking the best option is to go ahead and get a new R380 to replace the existing one along with cleaning up and re-sealing the t-case. This will include installation of a new clutch and new underdrive from ECR. I don't want to go part time because I like the full time 4wd and want to keep the parts common between my D90 and D110.

I also like having rover stuff under my rover instead of chevy/ford/whoever under it like all the jeepers. Now before anybody gets upset and tells me that it's all outsourced anyway and not much is made by rover, you are right. I dunno.. I guess it's just my messed-up thinking. And yes, at the rate I'm going, I'll probably end up with a dana 60 front under both of them at some point anyway. At that point, I'll change the t-case to part time and go ahead and run hubs on the front end. But for now, I am going to stick with what's already there and see what happens.

So.. back to the build-up: both trucks are getting ECR/Ashcroft underdrives and the D110 will get a new tranny. I'll probably pull the t-case as well since it should be checked out and re-sealed to match the new tranny and underdrive. The D90 will be treated to a rebuild of this LT230 (with only 5k miles on it) due to some serious oil leaking from one of the seals. Then, it will get the underdrive as well to make it much more rock friendly.

Wadda ya think? Besides :flipoff2: :flipoff2: :flipoff2: for building two.

-John

[Rover Addiction]

Originally posted by Serious One


The NV4500 is VERY expensive, expensive to maintain and repair. Getting it to bolt up to a 300tdi bellhousing isn't impossible, but would be a challenge.

IMO, you're better off getting either a rebuilt tranny, or a new one and just bolting it into place. You *might* get a unit from LRNA if indeed the repairs were supposed to have been made and weren't.



Well, I guess it's probably not worth struggling with the NV4500 since the R380 is strong enough for my engines and the only issue I've had is the spline wear.

Of course, no new unit from LRNA for me because this is the brit-spec D110 that is "creatively" registered.

-John

[Serious One]

Say no more!

I'd stick with the factory tranny, especially since you probably have no plans to go with an engine any bigger than a 300Tdi correct?

One of these days we should have a private contest to see whos LR is more 'creatively' registered!

I haven't decided how I'm going to do mine yet. I have 2 legal ways, and 1 slightly legal way. Hmmmmm.....

Michael

[Rover Addiction]

yeah, I'll stick with the 300 Tdi. I'm upgrading the turbo and intercooler so I'll get a little more out of it, but nothing extreme.

As crazy as it sounds, I love that little engine! Once I get this stuff set up, I'll have the low gears to get over whatever I want and still enough power to run it down the highway at speeds well over the legal limits.

As far as registration, I do know of a few sources for titles and vin plates if that's what you want, so let me know.
:D
-John

[Serious One]

Titles? VIN???

That is actually the part I have covered.

I'll keep you in mind though!

M

[Strange Rover]

John,

The underdrive your getting , how much lower does it make the gearing. Does it just effectively lower the low range gears or is it a selectable thing.

Thanks

Sam

[Serious One]

Hi again,

Talking about the part-time 4WD and keeping the parts common between the 90 and 110...

Basically when Timm makes the conversion from full-time 4WD to selectable 4WD he only replaces the center differential from the T-case. That's the only part that's changed, and honestly, if you were to drive your 90 and/or 110 on the street in rear wheel drive only, you would start to see why it actually makes a lot of sense.

It eliminates understeer and the propencity to 'push' the front end around corners. It also eliminates the stress and most of the wear on the front end.

I covered this in another thread, but if you do, what I'm doing to my 145 and my 80-inch, you could even put free-wheeling hubs and eliminate any spinning or wear on the front axle components. On my 80-incher I am also putting the freewheeling hubs on the rear axle too for flat towing.

So, just throwing out some more info. and points to think about.

Good luck!

Michael

[RockRover]

Not to mention that if you do put front 60's under your rig, then you'll need the part time conversion....With the t-case out and appart, it's the perfect time to do the swap....Commawn' join the dark side!!

--D

[evilfij]

John,

You CAN order an R380 for a 300TDi from LRNA.

You just have to know the PN. In fact you can even order a 300TDi long block.

I have a 11/98 R380 from a 300TDi which was replaced by an LRNA 300TDi R380 due to someone beating the synchros.

How about a zf slushbox for it?

Ron

[Rover Addiction]

Don't want a slushbox, LRNA is outrageously expensive, and I'm not ready to go part time. I may in the future, but at this point, I'd rather not deal with hubs.

I found a new R380 and will be cleaning up the existing LT230 for use with the underdrive. I'm not sure the exact amount the underdrive lowers the gears off the top of my head, but check out the east coast rovers website.

-John