700R4's???
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From: jackassville Florida
700R4's??? Hello, I've just acquired a 94 Z28 that shat out its 4L60E (figures since I hear there notorious for it). I've done some research and see that yall (other F-body owners) are surpassing this tranny with TH350's and 400's. I intend to do heads/cam/stall/12 bolt rear geared and posi'd (I will be spraying it). I need a tranny suitable to take abuse, but not pro-mod punishment lol. I'd like a 700R4 for the 4th/OD gear, and understandably they seem more reliable than 4L60E's (then again I hang around a TH350/400 crowd lol). I'd rebuild it with red clutches, shift kit and redo the valve body, also swap out the oil pump. I guess with this novel I'm asking for some insight? What all is involved in the conversion? Mostly being concerned with the speedo and computer problems... I spose I'm considering the overdrive/ final gear for the from a roll races 
Thanks,
Billy
Thanks,
Billy
Last edited by studlybilly; Jan 31, 2005 at 09:26 PM.
I don't see the point. A 700R4 has the same internals as a 4L60E except for the valve body, pump cover, and a few other small things.
You'd be swapping out the oil pump with the one out of a 4L60E.
You could swap parts out of a 4L65E into either a 700R4 or a 4L60E and have a stronger trans.
You'd be swapping out the oil pump with the one out of a 4L60E.
You could swap parts out of a 4L65E into either a 700R4 or a 4L60E and have a stronger trans.
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From: jackassville Florida
Ok then, I wasnt to sure on the 700R4. Are the TH350 and TH400 the same eaze to install? Or does one possibly bolt in as oppossed to the other? Sorry just trying to cover all bases before investing into something that wont work.
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From: jackassville Florida
Well after researching some more it seems I've narrowed my choices to the and TH400 (banking on the Th400 from hearing of its strength factors). With this i've developed a few questions that I'm researching for. I'm banking that I can use my stock flexplate with the swap? However, I'm unsure of whether I buy a TC for a Th400, or is there a key TC matching the splines thats a popular choice? Last and foremost, how much of a bolt in swap is this, as in saying will I be able to use my 4L60 xmember or will I have to alter/fabricate it?
Through reading the Th400 FAQ thread (god that thread was a brilliant idea to bad I didnt see it until after I posted my first question), I saw that it is possible to retain the stock shifter and I do plan to do so. I'm not going reverse Manual valve body as I will regularly drive/downshift this car and dont feel like rebuilding valve bodies yearly. I will simply use blue/red friction clutches, a shift kit, and a new pump.
Last and Foremost, I would love to keep my speedo and in check at that. I spose I should ask if in 94 they had a speed sensor in the trans and rear end or just possibly the rear end? If both then I'll need to look into a reluctor ring/speed sensor setup in the tail shaft. Any insight/suggestions are greatly appreciated at this point
Through reading the Th400 FAQ thread (god that thread was a brilliant idea to bad I didnt see it until after I posted my first question), I saw that it is possible to retain the stock shifter and I do plan to do so. I'm not going reverse Manual valve body as I will regularly drive/downshift this car and dont feel like rebuilding valve bodies yearly. I will simply use blue/red friction clutches, a shift kit, and a new pump.
Last and Foremost, I would love to keep my speedo and in check at that. I spose I should ask if in 94 they had a speed sensor in the trans and rear end or just possibly the rear end? If both then I'll need to look into a reluctor ring/speed sensor setup in the tail shaft. Any insight/suggestions are greatly appreciated at this point
Check out a 200-4r from a Grand national. That is what I have behind my ls1 and it works great.
The 400 and 350 are great because they are cheap and strong but they have no overdrive so if you drive the car a lot it will get old going down the road at 3500rpm.
The 400 and 350 are great because they are cheap and strong but they have no overdrive so if you drive the car a lot it will get old going down the road at 3500rpm.
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From: jackassville Florida
Originally Posted by 93LS1RX7
Check out a 200-4r from a Grand national. That is what I have behind my ls1 and it works great.
The 400 and 350 are great because they are cheap and strong but they have no overdrive so if you drive the car a lot it will get old going down the road at 3500rpm.
The 400 and 350 are great because they are cheap and strong but they have no overdrive so if you drive the car a lot it will get old going down the road at 3500rpm.
BIG DIFFERENCE.
The 200-4r's that were behind the Monte Carlos and S-10's etc are weak.
The GN 200-4r are much stronger, have much better pumps etc. They wont last forever like a well built 400 but there are a bunch taking 3600lbs GN's into the 9's.
You will be in the 500 hp range and I would venture a guess a well built 200-4r will last you a long time.
The 200-4r's that were behind the Monte Carlos and S-10's etc are weak.
The GN 200-4r are much stronger, have much better pumps etc. They wont last forever like a well built 400 but there are a bunch taking 3600lbs GN's into the 9's.
You will be in the 500 hp range and I would venture a guess a well built 200-4r will last you a long time.
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Thread Starter
On The Tree
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From: jackassville Florida
Tin Fer, Imma look into that, not sure if I can find one, I can find TH400's for 150 bucks all day and get friction rebuild kits for 220 bucks with valve body components (possibly less). I'd love OD though.
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On The Tree
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From: jackassville Florida
So I spose the remaining questions are:
What modifications will I need to do if any to the stock cross member in order to bolt a Th400 in (if any)?
Will I be able to use a 10" Torque converter made for the Th400?
If it came off of a Chevy v8, the bellhousing should bolt onto my LT1 correct?
With this being a 94, do I have computer concerns or anything of that reason going to this Th400?
and lastly, Will the slip yolk work with the Th400 or will I have to adapt a Th400 slip yolk?
What modifications will I need to do if any to the stock cross member in order to bolt a Th400 in (if any)?
Will I be able to use a 10" Torque converter made for the Th400?
If it came off of a Chevy v8, the bellhousing should bolt onto my LT1 correct?
With this being a 94, do I have computer concerns or anything of that reason going to this Th400?
and lastly, Will the slip yolk work with the Th400 or will I have to adapt a Th400 slip yolk?
Thread Starter
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From: jackassville Florida
Originally Posted by 93LS1RX7
If it is like the LS1 then yes you will have to reflash the PCM to a M6 setup. Otherwise the PCM will be looking for inputs from the 4L60e and you will have some issues.
Teching In
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From: Marion, Iowa
If I were you I would not move to a different tranny. I have a 92 camaro that for all intended purposes shat its tranny behind my 355hp motor. I was seriously looking at a built up TH350. But then I started looking at what it would take to convert. You need at least $100 in brackets/crossmembers and then you would need to throw at least another $100 at the speedo issue. And then you have to pay for a CORE of a TH350 or TH400. You are talking a very easy $300 additional on top of the stout rebuild... and THEN you are stuck WITHOUT OVERDRIVE!!
My uncle who owns a tranny shop told me that the 700s can be built just as strong as the 350s and 400s. Granted it might be a little more money but you should be able to make that up since you already own your core.
My uncle who owns a tranny shop told me that the 700s can be built just as strong as the 350s and 400s. Granted it might be a little more money but you should be able to make that up since you already own your core.
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From: jackassville Florida
As of now I'm looking further into options for the 4l60e's, I've talked myself into giving the tranny a chance. I'm going to put an unbreakable sunbelt spindle in it, 5 pinion planetary's, corvette servo, master rebuild kit with red clutches and kolene steels, complete oil pump (of course), and transgo shift kit.
Last edited by studlybilly; Feb 4, 2005 at 02:38 PM.
