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Turbo 700 versus Trimatic

 
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 200
Location: Cranbourne North

Posted: Thu Apr 15, 2021 12:26 pm    Post subject: Turbo 700 versus Trimatic

I am weighing up which auto (trimatic or t700) to run as we are now going auto, the car is an EK sedan, motor is a 161 red motor (high comp, stocker), diff gears are hopefully going to be 3:55 to 1 (eh diff not checked yet). A few of the boys have questioned whether or not the car will actually have the power to use the overdrive gear in a t700. This has come about due to one of them pointing out the tech article in the latest Street Machine which does this conversion on an EK ute with a warm red.

My thoughts are that we are going to the effort of making it an auto why not a 4 speed? Can anyone see this being a problem?

Thanks guys,
Brett
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Pep
900RPM



Joined: 14 Jun 2021
Posts: 936
Location: Georges Hall, NSW

Posted: Thu Apr 15, 2021 4:19 pm    Post subject: Re: Turbo 700 versus Trimatic

devilrod wrote:
I am weighing up which auto (trimatic or t700) to run as we are now going auto, the car is an EK sedan, motor is a 161 red motor (high comp, stocker), diff gears are hopefully going to be 3:55 to 1 (eh diff not checked yet). A few of the boys have questioned whether or not the car will actually have the power to use the overdrive gear in a t700. This has come about due to one of them pointing out the tech article in the latest Street Machine which does this conversion on an EK ute with a warm red.

My thoughts are that we are going to the effort of making it an auto why not a 4 speed? Can anyone see this being a problem?

Thanks guys,
Brett



I'm no expert on t700s....but I know trimatics are not the strongest box around...but I would suggest that its a better option than the t700. My reasoning is that the t700 overdrive does require an engine with a bit of torque. The 161 will be happier with a trimatic IMHO.
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 200
Location: Cranbourne North

Posted: Thu Apr 15, 2021 5:07 pm    Post subject:

Thanks Pep. We seem to be leaning more trimatic than t700 but you have to ask silly questions sometimes to learn things.
Anyone want to add their 2 cents worth? It would be most welcomed.
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FRANK BASILE
500RPM



Joined: 07 May 2021
Posts: 591
Location: MELBOURNE

Posted: Fri Apr 16, 2021 12:27 pm    Post subject:

I will go along with Pep on this one,with a question though.Why not ditch the 161 for a 202?.............Frank
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 200
Location: Cranbourne North

Posted: Fri Apr 16, 2021 1:51 pm    Post subject:

Quote:
I will go along with Pep on this one,with a question though.Why not ditch the 161 for a 202?.............Frank


Already have the 161 and its a good runner which cost me $100 with crashbox, tailshaft and radiator
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Mr Cool
800RPM



Joined: 27 Sep 2020
Posts: 880
Location: Bacchus Marsh, Vic

Posted: Fri Apr 16, 2021 1:53 pm    Post subject:

FRANK BASILE wrote:
I will go along with Pep on this one,with a question though.Why not ditch the 161 for a 202?.............Frank

Geez, why not go the whole way and drop in a V6/t700 complete? The kit is avail off the shelf and the engines are now fairly cheap, better mileage, more reliable, more power, and to keep choco happy I'll have to mention its EFI
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Drewfus
Rookie


Joined: 14 Jun 2021
Posts: 48
Location: Newcastle, Australia

Posted: Fri Apr 16, 2021 3:25 pm    Post subject:

Some usless trivia for/from the memorybank....

My cousin and I fitted a trimatic to aEh Wagon, 171 powerplant(from memory it might have been a 179.... ), columnshift, anyhow, heres some trivia.

they are a little bit longer than the 3 speed, and will require a fresh set of holes in the original crossmember/support. similarly, the 'boxed arch' over the rear mount needs to be 'dinted' about an inch with a BFH (big hammer).

For the tail shaft, I think it was a 6 cyl from a LX torana hatch (just check this one when you get round to this part, definately a torana unit, just not entirely sure which one exactly).

Column shift was re- used (with some serious linkage modifications). The marked gears (the little pointer on the steer column) were out, we just grabbed a red marker and discretely marked new reference markers for the gears.

I'f your being cheap/tight, go the trimatic (we were given the one we used) still easy to find, and the stigma associated with them is overrated.

These days, I'd spend a bit more money and toss in a V6 injected unit as there cost effective and plentiful since they've been used in c'doores since 1988.

Cheers,

Drewfus
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bcal
700RPM



Joined: 04 Feb 2021
Posts: 711
Location: The Shire, Sydney

Posted: Fri Apr 16, 2021 5:01 pm    Post subject:

Tip.
If your traumatic needs a rebuild get V8 clutch packs put into it.
Shift is much crisper and they last a bit longer.
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Brett.
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Posted: Sat Apr 17, 2021 9:16 am    Post subject: Turbo 700 vs Trimatic

I think the Turbo 700 4 speed overdrive is massive overkill for your Holden red motor. Not to mention the massive trans tunnel modifications you will need to do to make it fit.

The trimatic is a good transmission providing it is not abused. It is not suitable for big horsepower motors but will be fine for the application you intend. (red motor in EK Holden)

Not many people are aware of this but Holdens where not the only vehicle to use the "trimatic", they were supplied ex factory for Peugeot and other European cars.

If at a later date you decide to upgrade the horsepower of your motor or fit a bigger motor the trimatic can be upgraded to suit accordingly.
"Raceglides" have a good reliable upgrade for the trimatic if required.

The beauty of the trimatic is parts availability. Cheap and plentiful.

Horses for courses. The trimatic behind a red six in an EK holden is a good cheap solution.
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 200
Location: Cranbourne North

Posted: Sun Apr 18, 2021 5:18 pm    Post subject:

Thanks for the suggestions guys.

Drewfus, your so-called useless trivia of mods to be made are pretty much spot on and as you said torana tailshaft, just not sure which one either maybe someone else can clarify?

Just to maybe answer why we haven't gone the v6/t700, this is a budget built car and when I say budget I mean budget . I would prefer to spend my money on getting a hot little flat motor for the roadster so the less spent on the EK the more I have left for my car

I have wheeled and dealed to get what I have so far and only need four 14" HG rims (I want a plain steel rim) and I have everything except paint for around $1600 (this includes buying the car and payin rego for a year as it was due when I picked it up). I don't intend on cutting any corners, as the car has now been setup for LX discs on HR front, 2 new rust free guards @ $25 each (now that was a find ) also eliminated most of the rust and now all thats left is hard work. All going well the wife will pilot it to John's picnic and I will be roadstering it.
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