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Location:
Melbourne
Registered:
September 2002
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 MA61 diffs
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Mon, 28 April 2003 23:40
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I know this has all been done to death, but while looking over the celicasupra forum from the US, I found that the guys from over there had found that the 7.5" Hilux diff will actually fit in the supra carrier(apparently). Have PM'd a few people and awaiting their reply, but if it is a straight swap, the price may be steep at $950 + GST, but I'm pretty sure they're a proper Torsion style diff not the original clutch type(much more reliable).
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Location:
Madrid - Spain
Registered:
August 2002
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Re: MA61 diffs
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Tue, 29 April 2003 00:11
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I thought the MA61's had a torsen type centre in them. or was it the MA70's???? 
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA61 diffs
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Tue, 29 April 2003 01:29
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Only the JZA70's had the Torsen G-series LSD's. The Hilux diff is 8" anyway, whereas the F-series diff in the MA61 was 7.5"
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Location:
Melbourne
Registered:
September 2002
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Re: MA61 diffs
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Tue, 29 April 2003 01:48
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Yeah, the back end is, but the front is listed on all parts lists as 7.5". Still waiting for the yanks to get back to me, but there's a supplier in Qland i think that can get them if they are a straight fit
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA61 diffs
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Tue, 29 April 2003 01:51
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So someone makes a Torsen LSD for the front diff in a 4WD Hilux? That sounds cool!
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Location:
Lost in the K hole
Registered:
May 2002
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Re: MA61 diffs
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Tue, 29 April 2003 05:51
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now THIS is sounding very interesting - ive never considered the front diff in any of the 4wd's....
cheers
ed
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Location:
NSW
Registered:
May 2002
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Location:
NSW
Registered:
May 2002
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Re: MA61 diffs
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Tue, 29 April 2003 06:34
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....or you can stick a 9" in it....... 
HAHAHAHAHA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Location:
North Sydney
Registered:
May 2002
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Re: MA61 diffs
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Tue, 29 April 2003 07:00
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A few years ago I went scouring wrecking yards to get an F Series out of a 4 Runner. There arn't alot around so I gave up and just got one of mine rebuilt and tightened up the LSD and its been fine since.
BUT...... If I was to have my time again, I'd throw in a 9 inch too and put a briggs and stratton under the bonnet!
Hell i'd even get rid of the rear discs and go back to drums 
They're meant to be stronger
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: MA61 diffs
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Tue, 29 April 2003 07:01
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Thought you'd get inthere before someone else, hey?
 
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Location:
Madrid - Spain
Registered:
August 2002
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Re: MA61 diffs
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Wed, 30 April 2003 00:13
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Paul, I think you have been doing too many burnouts, the smoke is starting to affect your thinking a little
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Location:
North Sydney
Registered:
May 2002
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Re: MA61 diffs
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Wed, 30 April 2003 00:41
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Hahaha never! Wait till my next burnout, you'll be lucky to see the car now i've got the hang of it.
Love those firgure 8's!!
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Location:
Melbourne
Registered:
September 2002
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Re: MA61 diffs
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Thu, 01 May 2003 01:58
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Nah, wasn't talking bout reconditioned or second hand items!! these are brand new diff centres from an american manufacturer! Oh well, back to those stupid 9" conversations again.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Location:
Brisbane
Registered:
November 2002
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Re: MA61 diffs
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Thu, 01 May 2003 02:49
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A mate has a Hilux diff in his RX3 with one of these centres. He absolutely RAVES about it... have to be careful not to bring up the topic or you can't keep him quiet
The car has 500rwhp and is regularly street driven. I myself went on a full-day cruise in it and can vouch for the fact that it still runs pump fuel (with methanol enrichment).
The diff has NO problems handlding that power on Azenis - he absolutely munches gearboxes though so he's certainly not easy on it. I think he's had it for a bit over a year now.
If you can afford one, they're a great choice.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 02:54
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So.... a brand new Torsen F series diff for a grand? Or am I confused here??
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Location:
Melbourne
Registered:
September 2002
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 06:26
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if we wait around till after tax return time, who'd be interested in a group buy? I'm sure we could get a much better price, esp on shipping
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 06:28
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Hmmm, I'll consider it, depending on how easy it goes in. I'll be needing a different ratio by then
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 06:29
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exactly. prolly an idea to find out how hard it actually is. it certainly wouldn't go astray for when a diff does actually break (imo)
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Location:
Montrose, VIC
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 12:36
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Oooops.... I feel like an idiot now!
I had looked into a Torsen conversion for my car already, studied the theory, and loved it muchly - till I did the numbers. So I went and bought a KAAZ LSD YESTERDAY! Not a cheap little pumpkin either... Actually, it'd be interesting to try and compare them almost directly - next person who fits one, tell me!
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Location:
Lost in the K hole
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 14:19
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I spoke to oppsite lock on wed, and i got quoted 990 inc GST. he's getting me all the tech info and specs from (detroit, US) on the 7.5" IFS 4-runner truetrac to compare with out f-series. the only concern may be which bearings it runs, but we'll soon find out.
cheers
ed
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 14:21
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This thought is seeming more and more appealing!
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Location:
Lost in the K hole
Registered:
May 2002
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: MA61 diffs
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Thu, 01 May 2003 19:41
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so why'd you decide against the torsen?
purely cost, or some other reason?>
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Location:
Montrose, VIC
Registered:
May 2002
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Re: MA61 diffs
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Fri, 02 May 2003 02:05
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Because the only Torsen I could find suitable was going to cost about $3500 by the time I did a diff housing, changed stud pattern, bought a new torsen, new gears, etc. etc.
Let's just say the KAAZ had better be REAL good! I'll letcha's know, putting it in on Monday.
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Location:
Melbourne
Registered:
September 2002
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 Re: MA61 diffs
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Mon, 05 May 2003 06:14
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This is what the link that gianttomato put up contains.
I know it's long, but this is the original post from Don. L(American smartman behind the conversion) Detailed conversion.
BTW prices are in US$
Well, thanks to all of you who provided info on rebuilding and upgrading the
LSD unit in my MK II Supra. Happy to report that the aftermarket LSD for a
Toyota 4x4 truck front axle, does indeed fit into our cars. I used a
TrueTrac 7.5" unit (same company makes Detroit Lockers), had to use Toyota
carrier bearings (part# 50066) maybe Archie can check on this part# to
verify. At any rate, this bearing fits our diff casing, and fits the
TrueTrac unit. I don't believe it is the same part as our original carrier
bearings. Sean at River City Differentials in Rancho Cordova, Ca. was just
awesome. He had the stock unit open and apart in maybe 5 minutes, sized up
the TrueTrac unit, decided it indeed would fit, had it installed in the
casing in less than an hour. I brought in a 3rd member from a Pick-in-Pull
yard with a 4.10 gear ratio for Sean to do the install. My orig rear end has
a 4.30 ratio. I'm looking forward to the slightly higher speeds in each
gear. Fortunately the engine is strong enough that the higher ratio rear end
is not a problem. I only had a chance for a fairly brief test drive, it was
about 11:30pm before I finished everything and I was pretty tired. Rear end
definitely hooks up better than before. Jumping on first gear from a right
hand turn use to result in quite a bit of wheel spin, not much forward
movement, felt like I had 500hp underneath. Now it seems to just steer and
jump forward. No dramatics. Looking forward to autocross this sunday to try
it out in a fast 2nd gear corner exit.
Cost of the LSD was $350 , carrier bearings $60, Sean charged me $40 labor
to set it up. Hardest part was getting the new 3rd member back onto the car.
What should have taken maybe 2 hrs ended up about 5 hrs. I just couldn't
get those darn 8 bolts on the diff housing to line up with the supports under
the car. Easy getting the 3rd member off the car though. Info follows:
TrueTrac gear driven LSD model# 911A342 , 27 spline
Toyota carrier bearings #50066 (may need to verify this) (90368-50006 ????????)
The old ring an pinion gear looked fine so reused it. Wanted to replace the
pinion and side seals but the parts I ordered didn't arrive on time. Could
always replace them later while on the car. The guy to call:
Sean
River City Differentials
3459 Sunrise Blvd #3
Rancho Cordova, CA 95742
916-852-7109
He says lots of customers ship him the 3rd members, he rebuilds, or replaces
the diff units, ships it out again. Something to consider if no dependable
diff shop in your area. I called around and most places acted like I was
asking them to walk on water. Randy's Ring and Pinion was one of the first
places I called, in the same area as Sean, and the shop foreman told me "we
don't do that." Lot of places just don't want to do anything thats not
listed in a book. Sean was not only willing to do it, he was actually very
knowledgeable. Told me the truck guys have been putting Supra LSD units in
the trucks years ago. Seems only right we can now enjoy the aftermarket
parts the trucks created
Compared to a $1000 Quaiff unit, or Torsen unit this should be similar. No
clutch plates to wear out, no rebuilding, good lock up. Some people have
told me if the car was generating lots of HP, the clutch type LSD units may
be better, although requiring rebuilding every few years. I think as long as
I'm not getting more than 300hp or 300 lbs of torque, this TrueTrac unit
should be fine. BTW, I put in Redline 75-90 gear oil, same stuff used in my
stock LSD unit. The TrueTrac doesn't need the friction modifier ingredient,
but shouldn't hurt since just helical gears, and the ring and pinion is
already broken in. If a new ring gear set, prob would use regular gear oil
for couple hundred miles for break in, then go with Redline. Any questions
just let me know !
Don L.
[Updated on: Mon, 05 May 2003 06:16]
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Registered:
August 2002
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Re: MA61 diffs
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Mon, 05 May 2003 06:47
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My diff is going to require a rebuild soon at any rate.
What is a rebuilt diff going to be worth as opposed to installing this baby?
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Location:
Melbourne
Registered:
September 2002
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 Re: MA61 diffs confirmed
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Mon, 12 May 2003 06:16
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From WilliamB82 off the CelicaSupra forum
"yes, the part # i listed is a swap in. you will need the carier bearings for an 89+ 4x4 front 7.5in irs diff though. with those bearings it is a drop in. i havent installed mine cause i want to use a 3.727 as with the current 4.10 i was breaking the tires loose at the top of second at 7psi. i dont want to think about the traction problems when i up it to ~20psi. alos, i was running 245/60/14's at ~22psi tire pressure."
Great news for us. found that Reider Racing in the Us is the best with regards to price-$US300. Apparently the bearing and seal needed to convert are a bit-$US150. But im double checking this. Mite be able to get it cheaper through a mate who works for toyota parts??
Cossie
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Location:
Perth
Registered:
July 2003
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Re: MA61 diffs confirmed
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Mon, 11 August 2003 13:31
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Hey all - did the idea of a group buy of a TruTrak go anywhere?
Anyone still interested?
Peter
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Location:
Brisbane
Registered:
May 2002
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Re: MA61 diffs
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Mon, 11 August 2003 13:57
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I know I am!
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