gday all just wondering what everyone thinks about the th700 boxs vs the 350.
some people tell me yeh they the same just one has an OD others say the 700 is just crap. so whats everyone ones experience / opinion with them?
cheers
th700 vs th350
Started by
_uglybob_
, Feb 05 2006 03:23 PM
16 replies to this topic
#2
LS1LX
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Posted 05 February 2006 - 07:11 PM
there not the same and the 700 is crap
#4
_uglybob_
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Posted 05 February 2006 - 08:55 PM
ok then fair enough. they cant be made strong??
#5
_Torana482HP_
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Posted 05 February 2006 - 09:31 PM
ive got a t350 lined up for me torry, i wanted a tremec 5 speed but they are too dear for me at the moment - maybe at a later stage. thought about a t700 cause i wanted o.d. but dont they have a computer etc. im staying away from computer controlled stuff these days. also dunno if a t700 would fit in a torry.
#6
_uglybob_
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Posted 05 February 2006 - 09:52 PM
well the th700's come with and with out a computer it just depends what year commy u robb it out of. also i already have a th700 fitted and runnign in my lc torri so fitting isnt a prob.
#7
_MYLJ_
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Posted 05 February 2006 - 09:58 PM
You can get a T700 modified to handle higher power, stock there not much chop but if your willing to spend $$$$ on a T700 it will handle the power, T350 are a cheaper option and cost less to modify than the T700 unless you need the overdrive I'd stick with the T350
#8
warrenm
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Posted 07 February 2006 - 07:47 AM
Have fitted a T700 (early non computer version) with a shift kit behind a 350 chev & no probs after 2 years. The driver is very hard on the car, & appears to work quite well with the 3.5:1 diff gears.
#9
_Bedford_
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Posted 08 February 2006 - 03:05 PM
The T700 is the VN commo auto box, right?
#10
LS1LX
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Posted 09 February 2006 - 05:49 PM
TH700 or 4L60 were from VN-P non electronic
4L60-E was VR-onwards electronic version.
The early ones still run an electronic speed sensor, but you dont need this for an old carby engine.
Either version there all weak. In short to get a TH350 and a T700 to the same strength a 350 would cost $2,000 and a 700 would be $4000. Or you can put a standard T400 in and it will be stronger then both with factory replacement parts.
If you have the room to fit it you cant go past a TH400, unless you want a 2 speed.
4L60-E was VR-onwards electronic version.
The early ones still run an electronic speed sensor, but you dont need this for an old carby engine.
Either version there all weak. In short to get a TH350 and a T700 to the same strength a 350 would cost $2,000 and a 700 would be $4000. Or you can put a standard T400 in and it will be stronger then both with factory replacement parts.
If you have the room to fit it you cant go past a TH400, unless you want a 2 speed.
#11
_salaszar_
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Posted 10 February 2006 - 07:10 AM
Up to 400HP and at $2000 your local tranny tech can fit upgrade parts. (400HP is the upper limit though so if you thrash it at that HP.....)
Up to 500HP and at $3000 you need it blue printed and parts fitted that are not off-the self (There is a company in Australia that does this).
Up to 580HP you need some special upgrade parts which I have not heard of in the Australia so you will need to go to the USA.
Higher than 580HP,,,no way (yet).
TH400,, very tough,,or its big brother 4L80e for twice the price.
Up to 500HP and at $3000 you need it blue printed and parts fitted that are not off-the self (There is a company in Australia that does this).
Up to 580HP you need some special upgrade parts which I have not heard of in the Australia so you will need to go to the USA.
Higher than 580HP,,,no way (yet).
TH400,, very tough,,or its big brother 4L80e for twice the price.
#12
_TORANR AMORE_
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Posted 10 February 2006 - 01:30 PM
I hope this helps:
I asked a similar question about the Turbo Hydramatics some time ago and found this information over the net very useful:
The three links below are for specifications, advantages and disadvantages as well as background for each of the TH400, TH350 and TH700
http://www.novak-ada...ledge/th400.htm
http://www.novak-ada...ledge/th350.htm
http://www.novak-ada...dge/th700r4.htm
The TH400 can take the most horsepower, but is not as 'snappy' as the other two and can also be a drain on your system.
The TH350 and TH700 can both be worked up for extra strength. I wouldn't consider the TH700 as crap, It has more advantages over the TH350 for street use but personally I would not use it for a race car, although it would be perfectly fine for a race car (it has a good ratio on the first gear and so on)
All 3 Turbo hydromatics will fit into an LX behind a 253/308 with the turbo bolt pattern.
I have a TH400 in my sedan, it's currently a drain on the whole system (it uses btw 12 to 17% of the engines power just to operate) and I want it out! It would be fine behind a 450HP worked 350 Chev, but not for my stock 308. If I were offered to swap with a TH700 I would take it, although I would probably have to change my tailshaft.
TH400's are also cheaper for parts and kits although your automatic mechanic wont admit to it.
You have to weigh up the pro's and con's and decide really what you want the box for.
I asked a similar question about the Turbo Hydramatics some time ago and found this information over the net very useful:
The three links below are for specifications, advantages and disadvantages as well as background for each of the TH400, TH350 and TH700
http://www.novak-ada...ledge/th400.htm
http://www.novak-ada...ledge/th350.htm
http://www.novak-ada...dge/th700r4.htm
The TH400 can take the most horsepower, but is not as 'snappy' as the other two and can also be a drain on your system.
The TH350 and TH700 can both be worked up for extra strength. I wouldn't consider the TH700 as crap, It has more advantages over the TH350 for street use but personally I would not use it for a race car, although it would be perfectly fine for a race car (it has a good ratio on the first gear and so on)
All 3 Turbo hydromatics will fit into an LX behind a 253/308 with the turbo bolt pattern.
I have a TH400 in my sedan, it's currently a drain on the whole system (it uses btw 12 to 17% of the engines power just to operate) and I want it out! It would be fine behind a 450HP worked 350 Chev, but not for my stock 308. If I were offered to swap with a TH700 I would take it, although I would probably have to change my tailshaft.
TH400's are also cheaper for parts and kits although your automatic mechanic wont admit to it.
You have to weigh up the pro's and con's and decide really what you want the box for.
Edited by TORANR AMORE, 10 February 2006 - 01:33 PM.
#13
_salaszar_
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Posted 10 February 2006 - 04:40 PM
I'm interested in your comment on how much power the TH400 consumes. Did you do some dyno measuring or judge it some other way?
#14
LS1LX
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Posted 10 February 2006 - 07:53 PM
torana amore how much power do you think you will save going to a 700? Try 5-10 hp at the wheels, the converter chews more HP then the transmission, dont know what youve been reading or who youve been talking to but boy dont listen to everything your told.
btw th700 has shit ratios, for street and racing. there good on a stock car were economy is a priority as you can run 3.08 in the rear and still have a good first gear, but once your in 2nd those boxes are shit.
Its a 3.06:1 1st then drops to 1.8:1 in 2nd, big drop, once in 2nd if you put your foot down there is no response its a waiting game for it to wind out.
btw th700 has shit ratios, for street and racing. there good on a stock car were economy is a priority as you can run 3.08 in the rear and still have a good first gear, but once your in 2nd those boxes are shit.
Its a 3.06:1 1st then drops to 1.8:1 in 2nd, big drop, once in 2nd if you put your foot down there is no response its a waiting game for it to wind out.
#15
_TORANASS_
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Posted 10 February 2006 - 11:34 PM
T400s can take alot of HP but there a big sludge bucket of clutches, they are a big big power drainer in a stock to mild engine, T700 would be the best auto for a mild street engine with nice gears and OD to compensate for the gears..
Ultimatly T350 would be your bet, can take heaps of HP built correctly.. $4000 for an auto is ALOT of money, for that sort of money you would want it Full manaul valve body, Transbrake, Top shelf converta at least..
Depends on what you need it to do.. Ultimatly a 2 spd Power Glyde is the toughest and best for a race car.. Then again it depends what your gone use it for...
John
Ultimatly T350 would be your bet, can take heaps of HP built correctly.. $4000 for an auto is ALOT of money, for that sort of money you would want it Full manaul valve body, Transbrake, Top shelf converta at least..
Depends on what you need it to do.. Ultimatly a 2 spd Power Glyde is the toughest and best for a race car.. Then again it depends what your gone use it for...
John
#16
gtrboyy
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Posted 11 February 2006 - 05:38 PM
Only problems with the th400 is that they are big,heavy & chew up hp.If you get a th350 built right it can handle the majority of engines.If I go auto I wouldnt mind trying a trimatic with a torque-power b/housing,but it would cost more than 3 grand easy.
#17
_uglybob_
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Posted 19 February 2006 - 01:36 PM
cheers fellas i didnt realise this thread was still going, thanks for all the great feedback toranr amore especially with the site links very helpful. im gonna keep the th700 but put a full B&M kit in it to giv it a little more guts.
cheers again
ben
cheers again
ben
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