Swapping Defender transfer case

[Ranga]

I inspected a Defender today that has a Disco auto gearbox and transfer case. The transfer case was installed first, and the gearbox some time later.

I found the gearing to be a bit high. It was a bit too sluggish from take-off, but revved nice and low at 100kph. I'm thinking a Defender transfer case would be better for me and my type of driving.

Anyone know how much it would cost to supply and fit a good Defender transfer case, or whether some tweaking will fix the slow take-off with the current Disco transfer case?

[400HPONGAS]

Not sure I understand but a good 4000 RPM stally will leave any ratio change for dead !!!! No more sluggish take off , and if thats too slow and your 60ft time is up then a nice Transbrake will really get it it out of the Hole . Whats your best ET ?
Ooops fergot than trans is one of those ZF22 thingys , week as **** .so strengthen it first !!!

[Ranga]

Not sure I understand but a good 4000 RPM stally will leave any ratio change for dead !!!! No more sluggish take off , and if thats too slow and your 60ft time is up then a nice Transbrake will really get it it out of the Hole . Whats your best ET ?
Ooops fergot than trans is one of those ZF22 thingys , week as **** .so strengthen it first !!!

Umm... WTF?! :confused:

Might need to put that in laymans terms methinks :eek:

[flagg]

I've seen reputable places do a rebuilt TC for around 1200 exchange.

If the box itself is in good nick, I have heard that you are able to replace the gearing in situ from 1.2 to 1.4.. but I can't remember where I heard it.

I recently swapped my 1:1 to a 1:2 (4bd1+R380).. I purchased an old RRC TC and had it rebuilt.. cost me about a grand inc fitting.

Cheers.

[stig0000]

I inspected a Defender today that has a Disco auto gearbox and transfer case. The transfer case was installed first, and the gearbox some time later.

I found the gearing to be a bit high. It was a bit too sluggish from take-off, but revved nice and low at 100kph. I'm thinking a Defender transfer case would be better for me and my type of driving.

Anyone know how much it would cost to supply and fit a good Defender transfer case, or whether some tweaking will fix the slow take-off with the current Disco transfer case?
dont you allready have a fender TC???

[400HPONGAS]

Sorry mate , I was dribbling Drag racing **** , totally illrevelant to what you asked , please ignore me

[isuzurover]

I've seen reputable places do a rebuilt TC for around 1200 exchange.

If the box itself is in good nick, I have heard that you are able to replace the gearing in situ from 1.2 to 1.4.. but I can't remember where I heard it.

I recently swapped my 1:1 to a 1:2 (4bd1+R380).. I purchased an old RRC TC and had it rebuilt.. cost me about a grand inc fitting.

Cheers.

OMFG - people pay far too much for T-cases!

I paid $350 for a late D1 Q-case recently (1.21:1 vs 1.22:1 for the old D1 case). Whacked in a McNamara 1-piece cross shaft conversion, and installed it with new seals.

Ranga - I wouldn't pay more than $500 for a good t-case. It is also likely you can find a defender owner who wants to swap for your 1.22:1 case.

That said - I think tweaking the engine could more than make up for the tall gearing.

[Ranga]

how much mucking around/cost in swapping transfer cases from 2 Defenders?

[slug_burner]

undo front and rear prop shaft at unis
undo hand brake cable
undo hi/low range selector
couple of bolts hold the TC onto back of gbox

reassemble in reverse order replacing back of gearbox seal.

Someone that knows what their talking about will be around soon and tell you about the best ways to line things up, move the case etc.

I don't even know if it is essential that you drain the oil :eek:

I'd say that someone that knows what they are doing would do it in two to three hours, for a mug like me probably do it in a weekend.

[Gumnut]

Well Slug Burner pretty much summed it up.
Forgot to disconnect the speedo cable and a breather tube, and the hi-lo and cdl linkages can be a bit fernickaty.
When putting back together, make a few long guide rods to line it up.
Easy peasy job.
Also, changing ratio is very straightforward, but IIRC, you must remember to swap speedo drive gear as well. They might be colour coded - green and blue, but I'm not 100% sure on that one, and which is which.
Andy

[ScottW]

What ratio TC are you after? We have a 1:1.003 ratio one here that is about to go on ebay (from behind the 727 torqueflight gearbox).

[Ranga]

What ratio TC are you after? We have a 1:1.003 ratio one here that is about to go on ebay (from behind the 727 torqueflight gearbox).

Not really sure! :confused:

If I buy this Defender with the Disco auto and TC, I'll be looking to put a Defender TC back into it to lower the gearing a bit. So probably a standard Defender TC, if there is such a thing.

[isuzurover]

Not really sure! :confused:

If I buy this Defender with the Disco auto and TC, I'll be looking to put a Defender TC back into it to lower the gearing a bit. So probably a standard Defender TC, if there is such a thing.

All AU defenders are 1.4:1 Disco is 1.22:1 up till 98/99 when they started fitting the Q case which is 1.21:1 (a huge change ;)). The 1.003:1 would be taller again the what you have, and was fitted to some rangies and isuzu one-tens.

[Blknight.aus]

Umm... WTF?! :confused:

Might need to put that in laymans terms methinks :eek:

he means "I have no concept on how to set up an automatic for usefull ofroading and towing but I can turn a perfectly good workhorse into a **** factor riceboy drag machine for you"

[400HPONGAS]

Sorry Blknight , I did apologise for those inherent ramblings !
However Ive set up more Automatics for offroad racing , on roadracing , speedway , dirt circuit , hillclimbs , NORMAL everday use , towing and finally Drag racing , than you have had hot breakfeasts , using every automatic you have ever heard of and most you probably havent heard of . Enough ****ing contest, can I help you with anything Blknight ,perhaps a Trimatic , fully manulised for your application perhaps ?
What number you run at Willowbank , havent seen you ??

[isuzurover]

What number you run at Willowbank , havent seen you ??

WTF does this have to do with anything???

In case you didn't notice, this is a 4x4 website.

The ZF4HP22 seems to hold up well behind a Tdi/TD5, and work well on an off road. Since you are the self proclaimed auto trans expert, how would you suggest improving it for offroad use behind a diesel?

[400HPONGAS]

Sorry Isuzurover , as you have said it was drivel , I apologise , I was mainly commenting on his problem of being slow to take off , so my comments were about the tune of the Torque convertor in terms of stall/flash/and lockup speed /Rpm/Torque. Willowbank is a Andra drag racing facility in Queensland similar to Motoplex , and doesnt have much to do with 4X4 's although some of us mad loosers throw our 4WD's down them for fun and to prove the state of tune .