Anybody in touch with Jacmac recently (prices?)

[Michele]

Considering lower gears to match taller tires soon (or not)
I'm still not sure I want to keep the Rover style R&P
although I've been offered a set of 4.11 at friendly price from Equipe...

I'd go the full Toy route today but the work/time required to remove/cut/modify the axles puts me off as my 90 is my DD...

Just out of curiosity,I wonder how much is the diff case only from Jacmac?
Build the diff,get new axles,swap the 3rds and it's done in a weekend.
I could even sell my ARBs and recoup some money.

Anybody heard from Jacmac recently?

Their website doesn't $ay much other than the old tale...


The "Rover" hypoid case can be supplied separately so that the Standard Toyota Carriers, LSD, ARB or Detroit Locker Carriers, can be used.
The locking hypoid differential case has been designed with a Machined Flat Area on the righthand side of the Case, where a Vacuum Block is fitted(...)Except for running the Vacuum Line from the Cabin to the Vacuum Block, there is no alteration to the Banjo Housing to fit this Diff Lock, unlike that of other design's requirements. The Standard Tail Shaft fits the Hypoid Pinion Flange.

[GRIMACE]

I beleive the vacuum hypoid locking centre come in at around $2000 EACH

But my memory is woeful and this was goin back a year or two.

[ISUZUROVER]

Michele - I got a price from them ages ago that was about $800 case only.

You would then need your own toyota ring and pinions, arb's, axles, bearings, etc... and a competent diff builder.

The only (possible) downside is that JM cases are low-pinion only, whereas high pinion is stronger for the front end.

To fit standard toyota centres you just need to find someone who can accurately drill a few holes (since you have the longfields already). If you don't ever plan to do comps (and have to change centres in a hurry) - you can do it the way Sam did initially and drill the flange of the diff centre, rather than move the bolts in the housing. So if you get hold of a spare housing, you can prep the centres, but the axles, and it will still be a bolt-in job (no need to pull the housings out and mod them.

[cloughy]

The only (possible) downside is that JM cases are low-pinion only, whereas high pinion is stronger for the front end.

.

I'd rather run a Tojo low pinion in the front, the HP's really are weak in reverse

[Slunnie]

I thought these were ok if built with a solid pinion spacer????

[Michele]

Michele - I got a price from them ages ago that was about $800 case only
(...) you can do it the way Sam did initially and drill the flange of the diff centre

Jeez!!!!!!


Too much.

Drilling the flange of the case sounds much better...


Hi-pinion at front from an 80 Series and low-pinion at rear,V6 minitruck style...that's what I know...I could use the rear winch to reverse if the Toy design is so weak

[nottie]

So there are no mods to the tojo axels once the tojo centre is mounted in the rangie housing then?

[HSV Rangie]

toy centres to rover axle housing.

aquire 2 centres.

drill Rover housing to suit toy centre. (I have a Jig used by a few melb guys)

Front:

bore out swivel housing to suit new axles.
fit new toy cv/bush to rover spinal and bore sindal to suit new axles.
machine pinion flange on toy centre to suit rover drive shaft.

rear:
bore spindle to suit new axles.
machine pinion flange on toy centre to suit rover drive shaft.


assemble.

drive away happy.

Michael.

[nottie]

If front is as easy as it reads then i am surprised that more dont do it

[HSV Rangie]

can do both in a day.

not hard.

once motivated easy.

Michael.

[defmec]

how do the toyo cv,s connect to the drive flange

[Michele]

With custom made drive flanges

[HSV Rangie]

how do the toyo cv,s connect to the drive flange

Michael.

[defmec]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

[ISUZUROVER]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

Where does the 3.50 ratio come from? 3.54:1 toyota 8" ring and pinions are available in the US and from Jacmac (low pinion only).

3.50 and 3.54 are 1.3% different. 1% is usually fine.

[defmec]

3.50 marks adapters website .if u have to fit 3.54 low pinion on the front what do u do with the steering link ?

[Michele]

Curious...what's that for?

[up2nogood]

No circlip on outer axle shaft. This locks it in pace of the circlip.

At least that makes sense!

[DL]

RE: Different diff ratios front and rear.

Hi,

Should have a read of this first.

http://www.outerlimits4x4.com/phpBB2/vi ... p?t=130440

cheers, DL

[Michele]

I didn't notice the lack of circlip...weird...

[callum]

up front can you not just run toy centre, jacmac 30 to 23 spline shafts and ashcrofts cvs? seems like the biggest faff is at the cv end and now that ashcrofts can supply a rover specific cv of similar strength to the longfield it is probably not worth the bother of converting to toy cv's. that leaves just the shafts as the non OEM part.

[HSV Rangie]

Curious...what's that for?

one of my mods to flange.

oil fill hole.

Michael.

[up2nogood]

So no need for a circlip, or is that behind the flange somewhere?

[ISUZUROVER]

3.50 marks adapters website .if u have to fit 3.54 low pinion on the front what do u do with the steering link ?

The JM centre casing is specially designed so the track rod will clear. If using a stock low pinion housing you would need to run a salisbury-style track rod.

[RUFF]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

Where does the 3.50 ratio come from? 3.54:1 toyota 8" ring and pinions are available in the US and from Jacmac (low pinion only).

3.50 and 3.54 are 1.3% different. 1% is usually fine.

3.54 High Pinion Toyota gears are also available from Jacmac. Sam has 3.54 gears fitted in his Turbo 80 series.

[ISUZUROVER]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

Where does the 3.50 ratio come from? 3.54:1 toyota 8" ring and pinions are available in the US and from Jacmac (low pinion only).

3.50 and 3.54 are 1.3% different. 1% is usually fine.

3.54 High Pinion Toyota gears are also available from Jacmac. Sam has 3.54 gears fitted in his Turbo 80 series.

Cool - didn't know that!

[RUFF]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

As long as you have a part time conversion it will never be an issue. I dont think i would run it with a full time set up though.

[RUFF]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

Where does the 3.50 ratio come from? 3.54:1 toyota 8" ring and pinions are available in the US and from Jacmac (low pinion only).

3.50 and 3.54 are 1.3% different. 1% is usually fine.

3.54 High Pinion Toyota gears are also available from Jacmac. Sam has 3.54 gears fitted in his Turbo 80 series.

Cool - didn't know that!

At least i think they are. They could possibly be 3.50 but im fairly certain they were 3.54 and from Jeff.

[ISUZUROVER]

i have a maxi rear sailsbury 3.54 would the toyo 3.50 front be ok or is there to much ratio differance

Where does the 3.50 ratio come from? 3.54:1 toyota 8" ring and pinions are available in the US and from Jacmac (low pinion only).

3.50 and 3.54 are 1.3% different. 1% is usually fine.

3.54 High Pinion Toyota gears are also available from Jacmac. Sam has 3.54 gears fitted in his Turbo 80 series.

Cool - didn't know that!

At least i think they are. They could possibly be 3.50 but im fairly certain they were 3.54 and from Jeff.

OK - will have to contact Jeff and find out. I thought the ones he sold were the same as here:
http://eastcoastgearsupply.com/i-126758 ... -3-54.html

[Michele]

it is probably not worth the bother of converting to toy cv's. that leaves just the shafts as the non OEM part

The point is to get better centres for better design (hypoid) gears.
Plus I have the RT conversion with 30 splines Longs CVs already.

P.S.
Edited to say:
Ben,could you try and get the latest pricelist while there?