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I supported Toymods
Location:
Perth
Registered:
May 2002
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 TruTrac diff in F-series casing
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Thu, 10 July 2003 00:23
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Hey guys,
This isn't really a question or anything, but I just received some pictures from a guy in the states who has just had a TruTrac diff installed in his MA61 casing.
Doesn't it look like it was always meant to be there? 
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Location:
Lost in the K hole
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Thu, 10 July 2003 05:24
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sweet! dude! sweeet!! duude!! SWEEET!!! DUDE?? sweet? DUDE!
franky, you got an email, i want an article on that!
cheers
ed
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Location:
Montrose, VIC
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Thu, 10 July 2003 10:17
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The idea's good - my only question hangs over the streghth of the ring gear etc.
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Thu, 10 July 2003 12:26
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My next planned mod is one of these things... if only I could get my hands on a 3.5:1 R&P! 
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Location:
Brisbane
Registered:
November 2002
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Re: TruTrac diff in F-series casing
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Thu, 10 July 2003 12:46
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| Quote: |
My next planned mod is one of these things... if only I could get my hands on a 3.5:1 R&P!
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You & me both. Although I'm not sure which one I need, exactly.
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: TruTrac diff in F-series casing
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Thu, 10 July 2003 12:54
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Excuse me for my ignorence, but whats so special about the pictures JCMF posted...and whats a 3.5:1(i know what his part means) R&P(whats R&P?)
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Location:
Lost in the K hole
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Thu, 10 July 2003 13:50
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the pics are of a torsen lsd (as opposed to a clutch pack type lsd).
its only recently come to light that these little detroit puppies actually FIT in an F series housing. prior to this 'discovery' there wasnt a lot of options for diff upgrades in the F series.
3.5:1 is the diff gear ratio. 3.9:1 is standard (kinda) in the ma61, the 3.5:1 is slightly taller, and will give you higher road speed per engine rpm.... something the guys with AMPLE power like to have (the rest of us need the lower ratios to make our engines feel better  )
oh, and the torsen lsd is CHEAP
cheers
ed
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 00:01
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is there an option for the G series diffs too ??
i hope it is stronger then the standard g series torsen cos they are not all they are cracked up to be. I exploded the hemisphere in mine using only street tyres !!
so much for the indestructable driveline.
Matt
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 00:04
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Yup, my 2JZ is doing about 3000rpm at 100km/h in 5th, which is just silly when I have boatloads of torque in a relatively light car. I'm hoping the 3.5's will get the revs down to 2500 or so, and I don't expect it will have much impact on acceleration. If anything it will improve acceleration; right now it just lights up the tyres when I floor it in first and second! 
TrueTrac's definitely are a bargain. After a bit of Googling I found them for US$315, so you could probably land them here for $600 or so with shipping. Has anyone actually shipped a similar item from the US? I'm interested to know what it would cost.
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 00:05
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| Yojimbo wrote on Fri, 11 July 2003 10:01 |
is there an option for the G series diffs too ??
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There certainly is! You can get them for practically any Toyota 4WD, including the Hilux (F and G series).
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 00:08
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Just how strong are they though.
I was quite surprised when my old one went bang!
I really didnt think it was under that much stress.
Matt
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Location:
Madrid - Spain
Registered:
August 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 00:18
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This is great news. I have been thinking of going for a Corona F series in the celica.
Yojimbo. What were you doing to break the torsen centre? I thought they were pretty tough.
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 00:51
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what about for the T series?
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 01:29
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Went for a big (4000rpm) launch at the creek (on street tyres).
was really surprisd as I had just watched andy launch his with full slicks on drop the clutch at 7000 rpm ( and hook up) without breaking his clutch type lsd.
Matt
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 02:10
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They aren't available for the T-series diffs I don't think. The bonus for us, is the 4WD Hiluxes have a front F-series diff, so thats why they fit.
Perhaps there was something wrong with your diff as well...they are supposed to be fairly strong, they appear a lot less complicated (from the standpoint of moving parts) than a conventional clutch-pack LSD...
I got these pics from a dude on celicasupra.com, I'll try and find out some more details...
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 02:23
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BTW, Ed, I want your 3.9 diff when it dies or you get a Truetrac...
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Location:
Lost in the K hole
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 03:04
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trutrac is only the centre... not the ring and pinion - ill be keeping those 
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 04:23
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I know someone who may be replacing his 3.9 R&P in the near future. 
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 05:41
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Well, the 3.73 isn't the best ratio for my 1GGTE, and its going to stuff up my speedo. So I figure I'll get a 3.9 down the track.
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 07:04
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Ok i've got this torsen\clutch pack lsd thing sorted in my head
whats the ring and pinion bit?
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 08:09
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| justcallmefrank wrote on Fri, 11 July 2003 15:41 |
Well, the 3.73 isn't the best ratio for my 1GGTE, and its going to stuff up my speedo. So I figure I'll get a 3.9 down the track.
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I'll let ya know if/when the 3.9 becomes available.
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 08:12
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| Cyber-punk wrote on Fri, 11 July 2003 17:04 |
Ok i've got this torsen\clutch pack lsd thing sorted in my head
whats the ring and pinion bit?
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Ring = big ring gear that goes around the diff centre.
Pinion = helical gear that meshes with the ring gear.
The driveshaft spins the pinion which turns the ring gear and applies torque to the differential (and of course to the axles and wheels from there). The ratio of teeth in these gears is what determines your "diff ratio", so if you want to change the ratio you have to replace the ring and pinion set.
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Location:
Perth
Registered:
October 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 08:18
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Speaking of XA-6X diff ratios, I'm planning to stick with the 4.3 in my auto 1JZ. Mostly because I'm rapidly approaching insolvency, but also because I want to see how it goes for getting that low down tyre-munching torque. JCMF has siad that the 3.7 is too low for the 1G, anyone want to have a stab at what would be 'best' (I do know it's a personal preferance thing) in a 180ish RWKW XA-6X?
PS: Norbie, ya know what diff is Paul P. using in the auto 2JZed?
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 08:41
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I'd go for a 3.7 with a 1JZ, but then again I've never driven a 1JZ so that's just a guess.
Paul P is using the stock 4.1 diff, same as me. He has no plans to upgrade because the auto has an uber-overdrive... he says it does 2400rpm at 100, while I do 3000rpm at the same speed!
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 09:10
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Hey Justin, how bout I swap you your auto diff for my 3.73? BTW, why does your car have a 4.3 diff? The Aus-spec auto Mk2's had a 4.1
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: TruTrac diff in F-series casing
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Fri, 11 July 2003 09:15
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I do about 2400 whilst cruising at 100km\h
3000 and i'm doing about 130km\h
My mate who for some reason has a EA falcoon revs about 1700 at 100km\h
Then again he accelerates like a slug
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Location:
Perth
Registered:
October 2002
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Location:
Perth
Registered:
October 2002
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Re: TruTrac diff in F-series casing
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Mon, 14 July 2003 06:20
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JCMF,
See my edit above - my brain not go so good at the moment 
Are you serious about swapping a 4.1 for your 3.7? If so, what sorta condition is it in? If I new I would be going manual sooner rather than later, I'd jump at this. As is, I'd like to do a bit more research, but am interested (lightbulb just went off in head).
- J.
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Location:
Brisbane
Registered:
November 2002
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Mon, 14 July 2003 10:38
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I'm serious, I'm ripping it out of my parts car. I didn't get to drive it more than once, but as the diff was one of the main reasons I put in for the car I ... tested it out. Verdict, it works well with both wheels lighting up and the car skewing sideways
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: TruTrac diff in F-series casing
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Mon, 14 July 2003 11:42
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I can also atest to the diff being in pretty good condition
I was going to buy the engine\gearbox in the parts car that JCMF is on about(but shit didnt go my way  )
anywho...i took it for a bit of a spirited drive and well...no unusual noises when i was smoking tyres up going around corners
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Mon, 14 July 2003 11:48
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Hehe, its fun doing that with no power steering huh?
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: TruTrac diff in F-series casing
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Mon, 14 July 2003 12:02
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Bugger bench pressing 75kg's
or doing 20kg curls
Just buy a MA61 with no power steering and go drifting
When Peewee said "she's a pig to drive" i thuoght yeah yeah yeah
Started reversing onto the street and it was pretty much WTF...steering wheel isnt moving
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Mon, 14 July 2003 14:13
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Pffft! Try doing the same thing with 400hp under your right foot.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Tue, 15 July 2003 00:54
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Haha, but you can use the torque to steer, you just have to turn it a little bit 
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Tue, 15 July 2003 05:31
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LOL good point! Not recommended at parking speed though.
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: TruTrac diff in F-series casing
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Tue, 15 July 2003 06:22
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Nothing wrong with painting the car park in rubber
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Location:
brisbane
Registered:
July 2003
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Re: TruTrac diff in F-series casing
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Sat, 25 October 2003 11:51
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With reguard to the strength of the pinion and gear. Why not get the diff internals cryogenically treated?
There was a zoom article on this a while back. From memory it could improve the hardness of metals by up to 300% while also making also making it tougher. There is a mob somewhere in south australia that does it and from memory its fairly cheap. heres a fair bit of info on the web. Just a thought?
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Location:
Montrose, VIC
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Sun, 26 October 2003 02:57
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With the gutless Falcon, that'll be because it has a 2.77 diff - very much cruiser gears!
As for not having power steering, you people are wimps
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Location:
Melbourne Eastern Suburbs
Registered:
October 2002
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Re: TruTrac diff in F-series casing
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Mon, 27 October 2003 09:24
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To save ordering them from America get them from Locked Drive Systems in granville...02 9897 7912... that way you can whinge at someone if they break
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Location:
Brisbane
Registered:
July 2002
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Re: TruTrac diff in F-series casing
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Mon, 27 October 2003 10:25
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Hey nrobie.
Johal here, are you getting a truetrac one any time soon.. if so could I possible buy ur stock ma61 lsd.. if its not screwed?
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Location:
Brisbane
Registered:
May 2002
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Re: TruTrac diff in F-series casing
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Mon, 27 October 2003 13:02
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Yeah I'm getting a TrueTrac very soon (it's en route from the US as we speak), but my MA61 LSD already has a new home - my Celica is getting it.
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Location:
Brisbane
Registered:
July 2002
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Re: TruTrac diff in F-series casing
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Mon, 27 October 2003 14:15
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| Norbie wrote on Tue, 28 October 2003 00:02 |
Yeah I'm getting a TrueTrac very soon (it's en route from the US as we speak), but my MA61 LSD already has a new home - my Celica is getting it.
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*shakes fist at your celica*
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