20 replies to this topic

[A9X]

Five litre , LX Sedan, daily driver

Pros & Cons

Discuss.......

[mitchg]

Had the T700 behind my V6.

Pros - Overdrive was great, cheap to replace, and running a trans cooler i never had any problems with heating or slipping.

Cons - They are a bloody tight fit. Hope you have tiny hands for the top bolts. And the location of the speedo sensor requires a cable ratchet type shifter to use the 321 option. I had a VT shifter with the big metal linkage and it fouled on the speedo sensor when trying to downshift.

[A9X]

thanks for that well considered and highly infomative response adam.
It will help me no end in deciding if i should go down that path.

I figure 2 pedals instaed of three will help with the six inch heels......

[rexy]

Are you manualising the box or retaining ecu control?
Certainly strong enough for a mild 308.
I was uninspired by the box in my VY ss but after fiddling with its shift characteristics (electronics only) its quite a nice thing to drive.
Only real con is the cost of changing from your current configuration.
I must admit its on my list of probable changes for the sedan.

[A9X]

all good mate, i did ask.

Rexy there is no conversion cost at this stage, car is a shell. Engine off to the builder this week so need to make the call. No ecu either, i'm thinking the manual box from the VN

[MRLXSS]

Hey Mate,

I'm running a TH700 behind my 355.

Pros - Overdrive is fantastic! Pretty SImple Box, fairly strong if you can get a good builder. The change over costs were minimal. Crossmember & Tailshaft (The Yoke is actually the same spline yoke as Trimatic). You can also run a lock up clutch (I haven't hooked mine up yet). But this will further bring down the RPM in top gear. Fitting wise, I found mine easier to fit than a trimatic! Not sure if it was just the location of the top bolt of the bell housing, but it was easier to bolt up and seemed to be better balanced sitting on the jack!

Cons - Getting the TV Cable Set Up... (The GTS, I'd love to know more about using a pressure gauge!). I thought I had mine all set up perfectly... But last time I drove it some problems came up again... I'm hoping all is ok and I have stuffed anything becuase the TV cable wasnt set 100%. Also it's slightly heavier, but I would say probably only like 5-10kg...

Hope that helps!

[UCgazman]

You can get a 90deg adapter for the speedo drive so no problem there.....

I need one of these, any idea who sells them?
Oh and the t700 was an easy fit (besides speedo drive), should be nice on the highway in 4th....

[Bernie]

Welby
If you increase the Pressures in the box you need lock the adjuster on the tv cable better than stock or it will pull itself back and you will flare between gears and it will crap itself in no time at all .Good box otherwise .Used one in Cruiser conversion and after the TV adjustment was sorted it has stayed together well .You can run 3.25 ratio and still get reasonable engine rpm at cruise in OD and be quick off the mark .


Bernie

[dattoman]

They say a T700/4L60 is essentially a TH350 with an extra gear
Whereas the 4L80 is a 3L80/TH400 with an extra

Its not that simple though
4L80 was usually reserved for such things as Suburbans etc that needed the extra to stay alive in more serious duty
You'd have to put one beside a TH400 to gauge its size... the TH400 is a tightish fit but certainly goes into a Torana without any floor mods

[A9X]

For me, a bulletproof t400 is nice but not needed. If I was to consider a 3speed I could make do witha t350.
The main positives on the t700 for me is in the low first gear to assist with 15 inch rims and a 2.6 or 3.08 diff; the .7 overdrive for highway cruising which I do a lot of.
The third and final positive is only to assist with peak hour stop start driving that the car will have to handle.

A minor win is its cheaper to go the auto route at this stage than a five speed.

My concerns are some people consider the 700 not up to a strong 8, and the bolt up issues which appear to be minor.

I believe jegs do a b&m t700 to suit street strip in Chevs for 1800 , plus freight. At our $$ conversion it looks good.

Car is still set up for a manual, so I need t o make the call this week.

Dave, who built yours and when ? What sort of $ are you thinking of?


Datto, can you get b&m stuff through your mob ?

[Ice]

If was me welby i would hunt a second hand one down and get it rebuilt by someone like tony at global
he will build it to suit your specks of driving

[ls2lxhatch]

4L65e
Wet 88 kg

4L80
Dry 104 kg
Wet 115 kg.

According to this document.
http://www.gmperform...ecfications.pdf

http://www.gmperform...e/articles.aspx


It would be worth checking how far below the centreline the oil pan is. The 4L80 appears to have a much deeper pan than the 4L60. Ground clearance could be an issue in a Torana.

Edited by ls2lxhatch, 14 January 2013 - 02:44 AM.

[Bernie]

I have a 4L80E and a t700 out of a VN sitting on a pallet .I have taken some photo's to give you an idea of the size comparisons .Both boxes are level at the bell housing face .The 4l80 dwarfs the T700 and the t400 I have as well .The bell housing is much bigger to accommodate the larger TC .The 4l80 will foul on the tunnel brace as the t400 comes close to it .Any way here are the pics

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