Transfer Boxes

[Wolfie]

I'm wondering about swapping the transfer box in the racer as I think a 1.6 ratio might suit her better than the 1.4 that's in there at the moment, the ratios just felt all wrong at Ellesmere last weekend.

My question is..... will I have any problems if I swap a 1.4 ratio LT230T for a 1.6 ratio LT230R.

Cheers

Wolfie

[Porny]

I'm wondering about swapping the transfer box in the racer as I think a 1.6 ratio might suit her better than the 1.4 that's in there at the moment, the ratios just felt all wrong at Ellesmere last weekend.

My question is..... will I have any problems if I swap a 1.4 ratio LT230T for a 1.6 ratio LT230R.

Cheers

Wolfie

You shouldn't do.... will be quick off the mark though!!!

You need a 12D or 20D suffix transfer box for the 1.667:1 ratio.


Ian

[Wolfie]

You shouldn't do.... will be quick off the mark though!!!
You need a 12D or 20D suffix transfer box for the 1.667:1 ratio.

Cheers for that, was just wondering if there was any significant difference.

Being quick of the mark would be useful, particularly as Mrs Eeyore did helpfully comment that I was the slowest up the first straight at Ellesmere. The main thing is to close the ratios up a bit. Some of the grassland sections were so power sapping that I had to sit on the rev limiter in second as she just died if I did change up. It might also allow me to use all the gears, only got up to 4th a couple of times each lap and still had 5th waiting to be used.

Cheers

Wolfie

[Porny]

We are just talking about in High Range... aren't we???
As all transfer boxes have the same low ratio 'ratio'.....

What gearbox are you using?



Ian

[Wolfie]

Yep, high range, low range only gets used when it's all going horribly wrong and I didn't need to resort to it last weekend.

Gearbox is LT85 (Santana 5 speed), on the back of a standard 3.9 V8

Regards

Wolfie

[Porny]

Wolfie,

OT - but this is the wing... was fitted for a short while to my 90 - until I stripped it!!! (then never fitted it to my 110") :shock:

No damage at all.  But does have a chequer plate section.

Is just all the outer panels, no inner arch.


Ian

[Xtremeteam]

Wolfie:
what sixe of tyres are you running??

205's or 750's?

had 750s on the racer & it was exactly how you describe,changed them to 205's with the 110 gearing & it would pull 65mph off road  :D  in high box,

9woulda been more if i hadnt ripped the front shocks off)

[Wolfie]

We're running 235/85s, so effectively the same size as 7.50s. Don't really want to go onto little tyres for a number of reasons so changing the gearing is the current plan.

Having said that, one of the reasons, namely needing some clearance under the Salisbury, is in the process of being resolved.

Cheers

Wolfie

[Xtremeteam]

if you fit the 1.6 Tbox it "should" have the same effect as fitting the 205's

[Devon-Rover]

Running a LT230R transfer box behind a TD which reduced the top speed to 50MPH where it used to be around 80 top wack. and that was on 235/85R16.

Also just as it might be of interest. The Hi/Lo & Difflock lever arrangement for the 230R is different to the 230T. the 230R has a curved lever whilst the 230T is straight.

Have you considerd changing the Differential ratios? maybe 4:1.1 to slightly lower the gearing which should accomdate the fact that you think that it is slightly over geared.

As i feel a 230R will have you screaming away on the longer straights and losing some top end speed.

[Wolfie]

I did consider axle ratio changes, but there would be a few problems there. Currently the car has a Salisbury, and I'm not sure if a 4.11 is available. I will sometime soon be fitting a Wolf axle and as it's P38A based the Ashcroft 4.11 won't fit. The price of a couple of 4.11 R&Ps is also quite a lot more than a decent transfer box even if it was possible to fit one to the rear axle.

The change in ratio is about the same either way, and I don't feel that there would be any additional benefit in lowering the low range ratio.

Although the linkages are different as standard, I think from looking at the workshop manual that it will be possible to use the existing arrangement. Can anyone confirm whether this is true?

Cheers

Wolfie

[Henry Webster]

Also if you carry spare diffs then all those need to be modified too, and they are more expensive to replace when you break one.

Guess who's been through this before! :lol:

I have put a lower set of Tfer box gears in the Borg Warner that I run and I run 225 or 205 tyres, but it could still do with being a bit lower for something like the Scottish Hillrally.

I guess I just need more power! :shock:

Wolfie - if you are interested in rebuilding your current box, I'll look out those gears.

Cheers

H

[Wolfie]

Well, I'll know if a 1.6 transfer box is a good move at Castle O'er. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4646026474

Might even have time to fit the "bit of an animal" as well http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4642153812

Regards

Wolfie

[Porny]

Is that a wolf rear axle or just a Td5 110" jobbie....

Basically the same axle internally, but the wolf version has reinforcing sections underneath and a heavier duty diff pan AFAIK (plus a few other bits and pieces)....

The normal late 110" axle is a toned done, civilianised one…

And you do know you’ll need a new/modified prop?



Ian

[Wolfie]

Now you've gone and sowed the seeds of doubt  :lol: I'm not certain, but he has other axles for sale that are not described as Wolf, so I'm hopeful.

Am I right that the ordinary axle is still a 4 pin? If so it's still not a bad price and could add a Tomcat strengthening kit to it.

Yes, I know a new prop will be needed, but was planning on a visit to Dave Mac anyway to get some props made.

regards

Wolfie

[Henry Webster]

Am I right that the ordinary axle is still a 4 pin? If so it's still not a bad price and could add a Tomcat strengthening kit to it.

Or don't worry, all extra unsprung weight - potentially causes problems in its own right.

H

[Porny]

Axle has the same internals as the Wolf axle, just not the strengthened casing

Unsprung weight….

Always a compromise between strength and thus reliability and weight.

In all honesty, a standard 110 Td5 axle ‘should’ be ok for your usage… and at that price isn’t a bad buy.


Ian

[Wolfie]

Cheers guys.

Just want to go collect it, and all the other stuff I've just bought, but the seller is away for a couple of days.

Then it's just a matter of fitting parts to the car, and fitting a holiday to Italy in, and I'll be ready to break her again.

Regards

Wolfie

[Henry Webster]

Are you going to do all that before Castle O'er?

H

[Wolfie]

Probably not  :)

I have to do the wing, if only so I can drive her about on the roads a bit cos it's fun. I would like to do the transfer box, although from memory it probably isn't quite as important for Castle O'er. She could also really do with some new Hockey Stick bushes as there was a huge amount of movement in the when we jacked her up.

The rear axle isn't too urgent as there isn't much wrong with the Salisbury, just a bit of a leak out of the pinion oil seal, so that can wait. Getting a prop made in the time available may be an issue.

The week of dangling on bits of string off the side of Italian mountains will reduce the amount of car fettling that we can do, but it needs to be done.

I also don't think I'll have time to rewire the boat, or even go for a float.

Regards

Wolfie

[Henry Webster]

I also don't think I'll have time to rewire the boat, or even go for a float.

Oh well, as I've found out recently, you can't do it all! :lol:

Sounds like hockey stick bushes are the most important thing, bar the cosmetics!  They will make Matilda way twitchy in the high speed stuff and there is plenty of that at Castle O'er.

H

[Wolfie]

Ah yes, I remember now! It certainly is fast, Tim Marsh was hitting 120 on parts of the course limited only by the gearing, at least when he wasn't on his roof.

The approach to Jn10 where we were on the Saturday was pretty quick. Plus there are some lovely technical bits.

Looking forward to it.

Regards

Wolfie