TH400 to 700R4 Conversion | In Depth How To
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- čas přidán 17. 08. 2017
- We join the original MonStar, Curt, in the garage today as he shows us how to convert from a original factory transmission, a TH400 in this case, to a Monster 700R4.
Now why would you want to go through this process? Not only is the 700R4 a more durable model, designed for heavy duty usage, but it also provides better gas mileage from the stronger overdrive, and a lower gear ratio by a factor of 20% than what can be found on most transmissions,
Curt goes over how to remove the original transmission from the vehicle, from the driveshaft and the torque converter to the unit itself.
From there, he uses one of Monster’s most popular products, the Master Conversion Package, to install the newly remanufactured transmission into the vehicle.
Items included in this kit include the actual 700R4 transmission, a performance torque converter, all the cables, bolts, and gears that are needed, a universal dust cover, and much much more.
Everything you need to know about upgrading your transmission can be seen in this step by step process with Curt. The process can be done by just about anyone with the right tools, making this less of a chore.
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Great video even for us seasoned swappers. Love that you can get the components to correct the shifter and indicator for the 4-speed trans.
Good job explaining every step. One thing to mention about the flex plate on a 454 engine is the plate has extra balance weight welded to it. If not used it will vibrate.
Thanks I bought a 700R4 and had no Idea how to get it to work, after watching the video, no problems.
one of the best instruktions i have ever seen . and easy to understand also for germans .
Just received my kit. The order process was smooth, pickup and return of my unit went without a hitch.
Turn around time I thought was lightning fast. Cannot wait to install.
this helped me alot. I'm building a old monte carlo and new to transmission set up. Got a hold of a 700r and i had no idea what to do with the lock up wire. very detailed and informative. thahnkyou
Glad we could help. Sounds fun! 😎 Check out our channel we've got a lot of videos on the 700 you might find useful.
Thank you for your video I recently had a 200 4r tranny put in my 1969 Firebird I didn't know how in-depth it was to do this job I really enjoyed how you explain that and I really enjoy the overdrive Transmission in my car out on the interstate it's a lot of fun
very nice job of describing parts and process for this install, really concise.
Thank you Mr. Curt great job. The best teacher for us.
Wow what a thourgh install video. I learned alot. Great job MS!!!!
Outstanding video Sir!! I am going to swap a th350 for a 700r4 in a 78 Chevy Scottsdale 4x4. You answered a ton of questions I had so thank you so much!! Now to find a reputable shop that can handle the work in AZ. Thank you!
Best video for conversion kit on CZcams.
Thanks! We try 😏
Thank you. Excellent tutorial for the TH400/700R4 swap, just what I needed.
Great learning video. Going to Monster to get my conversion kit
Thanks for the education...
One thing I would have mentioned ...is to be sure the O-ring is on the end of the shaft before installing the torque convertor ....
Good job... lighting, detail, etc.
Thank you, we try!
Terrific job, Curt! Your clear instructions will make this job much easier for me when my new Monster 700R4 goes into my '68 Chevelle. Then, on to upgrading the '67 GTO's TH400!
Good luck finding a 700R4 with a bell housing bolt pattern for a BOP engine (unless your running an LS or SB/BB Chevy engines).
For anyone installing the torque converter, the converter must have at least 1qt of ATF inside as indicated, but turning and pushing to fully seat can be checked very easy. If you place a straight edge or even a length of 2 X 4 that straight, you will be able to slide your thumb or index finger between the two. If not fully seated, the torque converter will crack the front pump gear.
This will ruin your day! A simple quick check will avoid this sad issue when you are in a hurry, cold or laying on your back.
Just a tip.
ASE Master Tech since 1978 / Retired
Great video! Was considering this conversion for my daily-highway-driver 88 suburban 3/4 ton 5.7L because OOOOFA the gas mileage!!!
I like that tool he used on the flywheel. I always do it from the front of the engine, but that tool would make it a lot easier.
very good video, this man knows what he is doing.
Thanks for the Comment and support Bud! We look forward to chatting with you about that 700R4 for your Pickup!
Nice video step-by-step instructions you helped me out a lot thank you for your video
Glad to hear it, thanks
Sweet Billet servo Cover!
Wow thanks for the info really helps. I’m putting a th400 into my 66 impala for the first time
That's awesome Dave! If you end up having any questions give or technical support a call 800-708-0087.
If possible I could use some advise on a stall converter for my 66 Impala. I have a TH400 that’s coming out of a 83 3/4 ton 305 Chevy van. It has everything I need.
For the Impala I’m running a carbed 8.1 496 with the HT502 cam and for the rear end a stock 12 bolt with what looks like the original 308. Any suggestions
We would recommend getting a converter with stall speed of 2300-2500 mph.
Monster Transmission Ok will keep that in mind and thanks for the reply. 👍
Great work 👏👍😀
Wish I had a lift I could do my job myself .damn.thanks for the video .learned a lot thank you .👍👍👍👍👍👍👍👍
Ur good instructor.very concise.
Great video. I am getting ready to do my install and was wondering do the brass coolant line fittings get treated with some type of sealant or just install them dry? Thanks
Very Good instructions ! Thanks
Would love to see before and after track rrsults.
Great Video.
🙂👍
Nice work
I would assume that the drive shaft was the correct lengh from the th400 to the 700r4 or wasbit modified
Good video but couldve talked about hooking the cooler lines back up and which one goes on top. Couldve also showed how to adjust or check adjustment of the TV cable before you drive it and burn it up.
Do they make a shift kit for this 700 R 4 so it goes in faster and stronger when pulling a trailer? Mine shifts like a Cadillac and is slow going into 3rd mostly.
He is so good at explaining everything that it makes me want to exchange my turb 400 in my 1979 gmc pickup to a Monster 700R4 but can I afford it?
Thank you Bud! Give us a call at 800-708-0087 and we can review your build and the options you have to get upgraded to that Overdrive
If your 350 trans has the 9 inch tail shaft do you have to shorten drive shaft
Thanks ... 👍
Top drawer.
This is what youtube is all about.
Thank you Hot80s , We try to share the knowledge of shift with everyone and CZcams is a great platform to share this info that is often kept secret.
What about converting from a TH400 to mate 700R4 with a Buick 455 which has a different bolt pattern than Bowties?
How much does this conversion cost all the way down to the shifter and laybor ? I would like to do this same process to my 1976 Nova.
You're the best tutor, Curt. Want to ask, is the process of installing the 2004R similar to the 700R4? What do i need to look out for in the differences? I have a TH350, and got a new 2004R with lockup converter few years back.
Hello! We appreciate the kind words. Swapping from a TH350 to a 2004R is one of the simpler swaps, just make sure you double check everything, set the TV correctly and get a external lock up kit if you dont already have one.
@@MonsterTransmission I'll get the TV cable and external lockup kit from you for sure in the next few days. Thank you so much
Well explained clip .cheers
good job, make Torqueflite swap OD trans, 904 to A500 (42RH) ....pls
How different is this swap from a TH 350? or is it pretty much the same? Great stuff from you folks, Thank you!
Yes they are the same.
I have a 83 El Camino and I want to put the engine and transmission from a 89 Chevy Caprice in it. The engine is a 305 and the transmission is a 700r4 what would I have to do. O yeah this is my first project
What about the cable bracket on the transmission it self, what bracket is used on it to hold the cable
If you're talking about the t.v. cable, that bolts directly to the transmission. And if you're talking about the linkage cable, it would vary depending on what rebuild kit you have.
Increase 4th cluth pack, add corvette servo first
would love to see him do the same with a 4x4 k10 haha. wonder how different it is
Awesome
Thank you Stephen!
2 questions....1)will conversion also be the same or any specific differences for a TH350? and 2) what can I expect to pay for a trans shop to install the new 700? This would be going on the same application as you had in the video but a SBC 71' Chevelle SS.
To your first question, yes it would be pretty much the same. For your second it's hard for us to answer as that varies from shop to shop. It's always a good idea to call around and find a respectable shop you know and trust. You could try finding a vetted installer by using gearnation.com/. They're one of our partners and they vet and connect people with shops all over the US. Hopefully there's some shops on there in your area.
Love it - maybe dumb question, but on the 700r4 which of the cooling lines is the feed and which is the return?
No such thing as a dumb question, You can find the correct coolant lines in this video czcams.com/video/tnFPgjQq3aA/video.html
But in short, the top is the feed and the bottom is the return
I have a 1991 4X4 Chevy truck with a manual trans and I want to convert to 700r4. I know I need cooling lines, steering column and linkage but what else do I need as far as the transmission goes. My hip is starting to give me problems when clutching.
To convert from a TH400 4x4 to a 700r4 4x4 you first need to contact Advanced Adapters they specialize on these 4x4 conversions and will set you up with the perfect Adapter you will need for your application. Sometimes they have 2 options for the Adapter 1.) Output shaft Adapter Kit in the Transmission or 2.) Transfer Case adapter. They can be contacted at www.AdvancedAdapter.com or 800-350-2223 and please let us know if we can help you with the Transmission build we work direct with Advanced Adapters building those kits in for many years, you would just have it ship direct to us and we can make it apart of the build process. Thank you for choosing Monster Transmissions.
Can use a 700r4 with a 2300 to 2500 "10 mechanical stall with out the lockup conversion kit?
If both the converter and transmission were converted to non lock up, then yes it is fine.
As a daily driver?
Do you guys make lock up kits for the 400. I recently found out that’s painless. 3 speed with a lock up.
No, we don't have a lock up kit for the 400.
coan does...about 2500.oo ...converter ,i think..about the same
@@brianmathew09 Are you saying $5K total to make a TH400 lockup?
Where is this conversion on your web site? I want to change a 1973 Buick Riviera TH 400 to the the 700-R4. Can I bring my car into have transmission converted? Like to increase my MPG above 10 mpg. Please respond.
We apologize but do not offer install services.
You can find that conversion package here:
www.monstertransmission.com/700R4-Master-Conversion-Package_c_5821.html
I thought the 454 was externally balanced? How can you use a flexplate out of the box without balancing it to match the stock flexplate?
It all depends on the rotating assembly the flex plate is internally or externally balanced
Great video, he cracks me up saying "bolt hoe"
So so much easier having a lift and transmission jack .
A world of difference with the right tools to make it easier!
I'm a little confused. Why does it have a shifter rod and a cable? Isn't one for column shift and the other for console? I'm working with a column shifted 68 pontiac 350 to 700 swap.
Yes you are correct
What about models that have gear indication on the dash and not the console?
Some models require to use of an aftermarket floor shifter but shiftwork sells alot of conversion pieces for column shifters
Is there a difference in a TH400 Flexplate and a 700R4 flexplate on a 1982 Chevy 350 engine ?
Yes, the patterns is different
I remember way back in the day when they first came out everyone was pulling out the 700 and going back to the 350 turbo cause of junk that the 700 turned out to be
From 1982-1984 GM had a lot of issues with the 700R4. And in 1985 GM corrected these issues and since then the 700R4 been the most versatile four speed GM has made.
If a 700R4 from 1982 - 1984 gets completely rebuilt, will it fix the problem that you are referring to? What exactly was the problem?
I want swapout my th400 with a 90 model 700r4,. do yall have a kit that has the parts to do this ? my car is a 71 Malibu on the column. thanks. also the engine is a 400sb.
Yes that will work
Good job
thanksss we try :)
Can I use any one of the 400 to a crate 350
A 400 tranny to a 350 crate
Yes, you will need a GM style bell housing though.
So this has been done for a fact
What is the major difference between a 400 to 700r4 and a 350 to 700r4?
*The 700r4 will be controlled by a TV cable (Throttle Valve Cable) to adjust the shift points and it will have better fuel economy being a 4 speed Transmission with Lock up with a Low first gear Ratio. These can be built up to 1000HP with our SS Xtreme Models.
*The TH400 will be controlled by the Modulator there is no cable you will need to produce vacuum to operate this Transmission and this is a 3 speed so you will not get the best fuel economy. The TH400 is one of the strongest and most reliable Transmissions available we have built to hold upwards of 1200HP+ they are bulletproof.
*The TH350 will be controlled by the Modulator as well and you will need to produce vacuum like the TH400 but on the TH350 you will have a Detent Cable this is a 3 speed as well so fuel economy is not great. The TH350 is the weakest of the 3 Transmissions we are talking about and can be built up to 600HP.
Nawce, I thought video was turning a 400 into a 700 literally 🏁😂🔧🍻, I think it's cool when you go to a car event or show and some dude like hey I noticed your trans dip stick is leaking ,here's and extra seal 🔧🙋🍻, but no one does this 😞🏁 anymore, I enjoyed the very well explainatory video and what do you do with spare good parts?
how much for a monster 700R4?
You can find the 700R4 Monster Transmission that's right for your application here: www.monstertransmission.com/700R4_c_3942.html
Or give us a call at 800-708-0087
Can you install mine?
Why would you go with a 700R4 and not go with a 4L80E? Isn't the 4L80E closer to a TH400 as for as toughness?
That would depend on a couple things. But yes, if they have high power a 4l80E is the best way to go. This was just instructing for someone who was converting.
@@MonsterTransmission 4l80e need a computer .or you have to go with a full manuel kit
4l80e needs way more computer/electronic shit than the 700r4
Why would you possibly want a 700r4? I was looking to see if i could convert my 700r4 to something else? I have a 1990 1500 and it is just a nightmare
The 700R4 is good reliable transmission when built to the application and HP it is being used for. The manual TV cable makes it easy when you don't want to mess with electronics but still gain an extra gear for highway cruising. There are other options depending on your application, give us a call to go over your details at 800-708-0087
Not to be a troll I’ll never understand why someone would retromod a hot rod , put a $10k engine , new suspension, new paint and put a th 350 or 400 in it ! For a street rod these transmissions are obsolete. I like the drivability.
The 700 and 400 transmission is the same dimension...
Why replace the th400 with the 700r4 is it better
The owner wanted to convert to the 700R4 to gain the lock up. This gives him a more enjoyable ride and save his engine and gas mileage on the highway.
I'm pretty sure this guy knows his stuff but if i had a turbo 400 i would keep it. Thats what those older cars came with.
Keeping the TH400 is great if you are keeping the car original but upgrading to the 700R4 allows the car to drive at a much more comfortable rpm on highways and gives better gas mileage. Give your classic more drivability with the overdrive by doing this conversion.
when I first saw this I'm thinking that I would never change the TH400 to a 700R4... especially going in behind a Big Block.... absolutely go to a 4L80.. its a TH400 with overdrive.. much stronger trans than the 700R4.... good video though....
The 4L80e would require a computer to run the transmission, and may be too big for the vehicle the TH400 is being replaced in. The 700r4 gives it the overdrive the owner is looking for but maintaining mechanical control with the TV cable.
Keep the 400 . .better than 700 .
All depends on what your application is, that overdrive does wonders on the highway
I completely agree i have a 89 Silverado C1500 2wd with a 700R4 it slips in and out of overdrive and the gas mileage is slightly better than a th350 or th400 which i don’t really care about rather have one of those than the 700 and in a couple months the 700 is getting pulled for a th400
This may be caused by a bad governor or you may need to readjust the TV cable. You can watch Curt as he shows step by step procedure here: czcams.com/video/yOS7YN05X7E/video.html
Ny Chan I love my th400
A well built 700R4 runs circles around a 400 and if it is slips in and out of overdrive something is not set up right. If TV cable and lockup converter are set up right it is a great transmission.
To simple a procedure to be so overly drawn out.
If you need this instructions,
You should stay in the kitchen were your best qualified.