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Location:
Canberra
Registered:
June 2003
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MA70 versus JZA70 diffs
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Fri, 20 May 2005 03:32
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Hmm got a strange one here. I have a JZA torsion LSD center currently residing in my 3.7:1 MA70 diff housing. I went to install a MA70 TRD LSD center and it won't mate the the crown wheel, the diameter is too small.
Anyone know which bits are interchangeable bewteen the 2 diff types? they are both G series so i thought everything was pretty much the same???
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Location:
Brisbane
Registered:
June 2003
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Location:
Canberra
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Fri, 20 May 2005 03:58
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You mean crownwheel?
The centre is ex Peter Williamson bathurst race team, just been sitting there gathering dust for many years. Pretty sure his Supra was a MA but may have been a JZA. Either way the diff issue still has me confused
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Fri, 20 May 2005 06:40
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I remember reading somewhere the TRD diff is somehow different to the normal G diff, I think they're slightly larger? Just a vague recollection though.
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Fri, 20 May 2005 07:21
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maybe the TRD is for A series??? A series were what all the later model diffs were.....
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Location:
Canberra
Registered:
September 2003
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Re: MA70 versus JZA70 diffs
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Fri, 20 May 2005 08:02
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If the vehicle , diff in your case is factory-equipped with L.S.D side gear shafts are required.
2 X 41309-14060
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Fri, 20 May 2005 11:46
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the group A one defeinty ran a larger crown wheel i remember seeing photos of the housing with MAJOR clearencing to fit it in (was on turbosupras.com but the website has been rooted for months), id suggest you look at JZA80 diff parts, maybe a souce for a crown wheel and pinion to get you going!
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Location:
Canberra
Registered:
September 2003
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Re: MA70 versus JZA70 diffs
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Fri, 20 May 2005 13:58
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Here is what you need the side gear shafts
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Sat, 21 May 2005 10:19
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| 1200det wrote on Fri, 20 May 2005 23:58 |
Here is what you need the side gear shafts
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| JustenGT4 wrote on Fri, 20 May 2005 13:32 |
MA70 TRD LSD center and it won't mate the the crown wheel, the diameter is too small.
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i fail to see how the side gear shafts have ANYTHING todo at all with the problem
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Location:
Canberra
Registered:
September 2003
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Re: MA70 versus JZA70 diffs
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Sat, 21 May 2005 13:27
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Quoted straight from the TRD Booklet and TRD Japan website.
When i purchased that TRD diff listed it had the shafts with it marked with TRD part numbers ....
| Allan wrote on Sat, 21 May 2005 20:19 |
| 1200det wrote on Fri, 20 May 2005 23:58 |
Here is what you need the side gear shafts
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| JustenGT4 wrote on Fri, 20 May 2005 13:32 |
MA70 TRD LSD center and it won't mate the the crown wheel, the diameter is too small.
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i fail to see how the side gear shafts have ANYTHING todo at all with the problem
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Registered:
June 2002
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Re: MA70 versus JZA70 diffs
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Sun, 22 May 2005 02:09
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| 1200det wrote on Sun, 22 May 2005 01:27 |
Quoted straight from the TRD Booklet and TRD Japan website.
When i purchased that TRD diff listed it had the shafts with it marked with TRD part numbers ....
| Allan wrote on Sat, 21 May 2005 20:19 |
| 1200det wrote on Fri, 20 May 2005 23:58 |
Here is what you need the side gear shafts
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| JustenGT4 wrote on Fri, 20 May 2005 13:32 |
MA70 TRD LSD center and it won't mate the the crown wheel, the diameter is too small.
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i fail to see how the side gear shafts have ANYTHING todo at all with the problem
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Yes the side shafts are needed when going from a TORSEN to a TRD centre.
But that is not Justen's problem (yet anyway).
Justen, If the centre is an oddball (1 off even), you'd be better of with one that you can easily get parts for etc...
Does the stock MA70 clutch type LSD not provide you with enough lock-up??
Or when it's shimmed up is it too locked (ie, no transition, ramping??)
May pay to find a 8.5" crown wheel and check it out!?!?!
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Sun, 22 May 2005 10:12
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Arent "A" series diffs 8.5" or are they 8.0" ? (native to UZZ30)
I know "B" series are either 8.5" or 9" (native to jza80)
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Sun, 22 May 2005 23:36
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A series are exactly the same as G series. They are also found in JZA80's and a whole bunch of 90's RWD Toyota's.
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Mon, 23 May 2005 03:51
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thus id suggest you find a B series to pull to bits and see if toyota raided the parts bin as thay so often do
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Location:
Canberra
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Mon, 23 May 2005 05:34
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Ok i think i have the issue sorted. The TRD centre was for a much taller crown and pinion setup so the pinion was bloody huge and offset the crownwheel a heap....too much for the 3.7 setup to mesh when used with the TRD centre. I chased up the matching crown and pinion and *touch wood* i'll be sweet. I'll have some news by Thurs.
Thanks for all the input...side shafts should be right but the housing may still need to be clearanced to fit the pinion...it is massive
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Mon, 23 May 2005 07:27
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Sounds like overkill for a Celica. 
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Mon, 23 May 2005 08:26
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i think a T series would do him  well, it is a celica diff afterall 
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Registered:
June 2002
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Re: MA70 versus JZA70 diffs
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Mon, 23 May 2005 09:25
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Justen, enlighten us all when you have the bits.
Pics are all good too.
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Location:
Canberra
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Mon, 23 May 2005 22:58
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Is that piston envy Norbie 
Celica diff.....sheesh, from the man with a boat anchour in the engine bay
Now start playing nice or go bother someone else's thread
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:29
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hey hey hey, im your mate...im a V8 man too...
on a more serious note, did you sort out what the issue is yet?
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:31
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| V8_MA61 wrote on Tue, 24 May 2005 08:29 |
hey hey hey, im your mate...im a V8 man too...
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'cept he has a real V8
| V8_MA61 wrote on Tue, 24 May 2005 08:29 |
on a more serious note, did you sort out what the issue is yet?
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Did you read the thread?
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:36
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| justcallmefrank wrote on Tue, 24 May 2005 10:31 |
| V8_MA61 wrote on Tue, 24 May 2005 08:29 |
hey hey hey, im your mate...im a V8 man too...
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'cept he has a real V8
| V8_MA61 wrote on Tue, 24 May 2005 08:29 |
on a more serious note, did you sort out what the issue is yet?
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Did you read the thread?
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yeah he mentioned he almsot had it sorted, but had clearance issues for the pinion gear.
Also, where i come from a V8 uses 16 pushrods and a cam that resides in the block that doesnt need turbos to make power.
I am interested in the Centre conversion for when i upgrade the diff in my ma61. What did the TRD centre cost you? Whether or not i go to G series or a 9" IRS kit will remain to be seen.
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Location:
Canberra
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:38
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yeah yeah it's all good.
Looks like we have. All the bits match at least, just need to see if they'll fit the casing. If not it'll just be a matter of getting the die grinder in there. It never seems to end up as easy as you would like but that's modding i guess.
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:39
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yeah, id like some pics when you're done 
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:43
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| V8_MA61 wrote on Tue, 24 May 2005 08:36 |
Also, where i come from a V8 uses 16 pushrods and a cam that resides in the block that doesnt need turbos to make power.
I am interested in the Centre conversion for when i upgrade the diff in my ma61. What did the TRD centre cost you? Whether or not i go to G series or a 9" IRS kit will remain to be seen.
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Yeah, but where you come from there is a high chance of your Dad being your uncle UZ's don't need turbos to make power, stick some big cams like your...cam, and it'll have ze uber mojo.
As for the diff, how bought you drive it and find out whether this "oh so powerful" V8 will even phase the F series
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Location:
Brisbane
Registered:
June 2003
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:48
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Not that I see.  I thought it was a valid point that if the only V8's where you come from are such low-tech jobbies, then you must live in redneck country Lighten up dude, i'm just stuffing around with ya
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Location:
Brisbane
Registered:
June 2003
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 00:53
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| V8_MA61 wrote on Tue, 24 May 2005 08:44 |
Edit: Oh and BTW, have you ever priced good quality 1UZ cams? i think when i looked they were about $900 EACH. Thats $4000 for cams! My good quality one cost me $350 NEW. You tell me whats easier and cheaper to get power out of. 
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Hahaha, $4000 for cams?
What are they? solid gold?
$4000 for a full valvetrain make over, then she'll make more power than teh pushrod can ever dream of.
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 01:04
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geting cams built up and ground is far from cheap $900 a stick seems about right
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 01:06
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| Allan wrote on Tue, 24 May 2005 09:04 |
geting cams built up and ground is far from cheap $900 a stick seems about right
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And you'd know this because you have a 1UZ where?
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 01:15
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i know this because yesterday i went down to wade cams while these where picked up and looked at the recept...
while thay are 7m-gte cams considering the intake on the 1uz would have to be done as two parts im guessing there would be an extra charge for this.
so what do you base your assumption of cam prices on? have you had any cams done recently? you have cams in your 1uz's?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 01:22
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Do I have cams in my 1uz? yes, I have 4, but they are stock.
Am I getting cams for my 1uz? yes, in a couple of weeks.
Am I going to pay $4000 for them? no, coz I am not a chump.
Are they nasty weld and grind jobs? no, they are billets.
Are they done in a backyard in Tullamarine? No, they are Tighe Cams.
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 01:29
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| CrUZsida wrote on Tue, 24 May 2005 11:22 |
Do I have cams in my 1uz? yes, I have 4, but they are stock.
Am I getting cams for my 1uz? yes, in a couple of weeks.
Am I going to pay $4000 for them? no, coz I am not a chump.
Are they nasty weld and grind jobs? no, they are billets.
Are they done in a backyard in Tullamarine? No, they are Tighe Cams.
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ummm its actualy hard facing and ground in a very nice little factory in burwood your obviously thinking of someone else..
as for your billets im very interested to see them once done! and please tell us your prices if your geting billet cams so cheap so the rest of us can have an idea of prices!
anyway if you wish to continue this start another threed
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 01:33
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Wasn't referring to your cams when I said regrinds or the dodgy shop. Was just making jokes.
Will post pics when I get them (after I decide what lift/duration I want)
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 05:14
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| CrUZsida wrote on Tue, 24 May 2005 11:33 |
(after I decide what lift/duration I want)
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Answer: big/ridiculously big.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: MA70 versus JZA70 diffs
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Tue, 24 May 2005 05:22
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Car needs to remain peak hour trafficable, and I'm not paying for a shim under bucket conversion.
That comes later.
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Location:
Canberra
Registered:
June 2003
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Re: MA70 versus JZA70 diffs
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Sat, 28 May 2005 01:28
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Mind if i butt in on my own thread
Diff is back together and feels sweet. Sorry didn't get a chance for pics but the only issue was the offset of the crown wheel on the centre. I could have made a spacer to get the right offset and run the 3.7 but no one was sure how it would last so i didn't want to take the risk. plus the new TRD gear set is chunky as so doubt i'll break that.
we also machined out the housing nose to take a larger pinion bearing as it appeared quite small compared to all the other bearings which are bloody huge.
I'll let you know how it feels n the road in a wek or two.
OK back to whatever it was you were arguing about
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Location:
Colac, Victoria
Registered:
May 2002
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Re: MA70 versus JZA70 diffs
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Sat, 28 May 2005 16:57
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Want some popcorn justen? - we got a great episode of days of our lives happenin in here
BTW just a note too re cams - should have those 264's soon for your old group A motor half the cylinders and twice as bumpy!
bopbopbop *ptsshh*
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