Your transmission and engine combination is very important. Your vehicles weight and how you drive it are also a major factor. Transmissions come in two basic types, Automatic and Manual :. The Turbo Hydra-matic was first used in model cars. It was developed jointly by Buick and Chevrolet to replace the two-speed Super Turbine and aluminum case Powerglide transmissions.
So, although it carries the Turbo Hydra-matic name, the Hydra-matic Division of General Motors had little, if anything, to do with its design. The and itsc, c and b derivatives have been manufactured by Buick in its Flint, Michigan, plant and by Chevrolet in Toledo and Parma, Ohio, and Windsor, Ontario.
Both Chevrolet and Buick divisions produced the TH Only two gears, best suited for very light vehicles, under lbs. The Powerglide is a two-speed automatic transmission designed by General Motors. Electronically controlled trans. Most of the same issues as the R4.
Terrible choice to run in an old school carbureted engine. Call Us: Login or register. What transmission is right for me? Gear 1 2 3 R Ratio 2. Very low cost to build up to various levels of power handling. Can be built up to extreme power handling capabilities. Most all transmission shops are capable of building these to at least level 1 or 2. No TV cable to deal with. Stall converters are low in cost, and the selection is broad. Very reliable and simple to repair if needed. Cons Select a final gear that will allow you the best overall performance and one that allows a decent off the line acceleration, and one that will be in a tolerable rpm range at highway speed.
You must have the correct stall converter for optimal performance. This can make a huge difference in the way your vehicle accelerates. One THM weak point was excessive end-play between the pump and center support and resulting wobble of the direct clutch drum due to both the end play and use of a relatively narrow bushing in the drum. Add an extra thrust washer between the planetary gear and direct clutch to remove the end play and using a wider aftermarket bushing in the direct clutch drum.
The relatively thin center support and lightweight matching splines in the case cause some people to beef up the case with an aftermarket case saver kit. These are becoming scarce, but there are still plenty of them around, and high performance parts are easily obtained. Very similar to a TH Strong internal parts.Select an option Yes No. Under Under Under Under Under Gas Diesel.
Car Truck Van. Cooler Deep Stock Pan. Every man has dreamed of it, thought about it, and even vision himself doing it. The time in your life when the kids are gone, wife is set up in her house like she wants, and you have some extra cash. The transmission we always dreamed about, the transmission with the best of the best.
The transmission you know nobody has ever developed before. On this date nobody in the world has the transmission parts available to build this but us. With the release of the new Smart Tech Input Drum we are proud to present this new development to you. Is there a better job? This transmission has broken all the rules and all the records. We have 14 major design changes that have been performed on this transmission.
It has arrived Ladies and Gentlemen. Our 1st area we wanted to address is the gear ratios in this platform. From the factory we are faced with a 3. Fast forward to today when a hp daily driven street car is the norm and you soon realize that you blow through 1st gear rather quickly and just blow the tires off. Then you hit 2nd gear and you see this large RPM drop and high horsepower vehicles are at a lower part of the engine efficiency. So we are faced with a 1st gear that is useless and a 2nd gear that initially lugs our engine.
We were sick of this and said we will not let this be an issue in our dream transmission. We changed the gear ratio on this transmission from the factory 3.
We took 2nd gear and changed it to 1. We achieved this with our 6 pinion front planet. This is the 1st time we have ever offered this planet set in a transmission.Gain extra benefits by becoming a Supporting Member Click here find out how!
Send Private Topic View Profile. Execution time: 0. All times are GMT Pacific. Current time is PM Top. Attach Photos to Posts. Contact Us. My Cookies. Frequently Asked Questions. Forum Rules. Username Post: R4 best years and best goodies???
I have picked a R4 in hopes of getting a good tranny to use.700r4 Build
I thought the most desirable years, as far as strength and reliability, were 87' thru 92'. That gets you a 30 spline input shaft grade up from the 27 splineand I thought additional clutches over the older versions up to and around 86'.
So, now I've picked up a th day of the year R4, and I find another site that says These units have the larger input shaft, larger input sprag, 10 vane pump, and the updated gear train. Does that mean my tranny has none of the gear train updates? I called the guy back I bought this unit from and he says that I have a 10 vane pump in my tranny, but what parts will the 88' not have that I might desire for a stout unit?
I can still return and swap this unit for a 90' or so, but I thought I would ask some people that might clear some of these mysteries. Re: R4 best years and best goodies??? The input splines changed in 85 but there is no real problem with the 27 spline pieces, it's just another way of id'ing things. What is your application?GM's small four-speed automatic has been both cursed and blessed.
Its 0. Cussing of the is usually a direct result of breakage, or because the lockup torque converter is acting up. A lot of things have to be right for a THR4 to work correctly and to hold up under trail use. Not much has to be wrong for the trans to either not function correctly, not at all, or self-destruct rapidly.
Probably the most common cause of a acting up--and consequent failure--is a maladjusted throttle valve cable. But for the tranny to work properly and last, there is much, much more that has to be done right, and with the proper parts for the application.
It took 10 years of building and breaking s before the torture testing paid off and Team Ramco got everything right. Having successfully used a R4 behind a ci big-block, Flash feels that running a TH behind a in your tow vehicle shouldn't be a problem.
It was never meant to be a very stout trans, but as we looked into the virtues of this four-speed juicebox in Four Wheeler's July '04 issue, we found that there are indeed several ways to make a R4 live, even in high-power applications.
Chevy Transmission Recommendations
In the process, we kept digging deeper into the world of s and discovered several more things that can be done to the R4, as well as things that shouldn't be done. For example, Team Ramco's "Flashman" Sharrar says that they can be built to withstand up to hp and lb-ft of torque. In addition, we found that mixing parts from different transmissions seems to lead to all kinds of odd behavior, including weird shift points and gear selectability in general.
After spending many hours interrupting the normally efficient work flow of the crew at Team Ramco a Yuma, Arizona, transmission shop asking questions, taking photos and gathering information for this story, we learned that a R4 can be made stronger than we'd ever thought possible, and that doing so isn't exactly inexpensive. Basically, building a TH is similar to most things in life in that you get what you pay for--the good, trick parts don't come cheap. Starting With the Correct Basics Although relatively obvious, it's best to use a K-case from a 4x4 rather than the weaker C-case of a 4x2 or car.
All those good internal upgrades are irrelevant if the case breaks. To avoid potential problems, it's also a very good idea to use a virgin--or at least a stock rebuilt--core, and one free of internal cracks.
Since there are a variety of cases, valvebodies, separator plates, and gaskets, it's easy to end up with a combination that doesn't function correctly. Not only do these components vary by year, but also there are specific parts for cars, hi-po cars, pickups, vans, utilities, and also for diesels.
Mixing them doesn't necessarily produce a match. Lastly, newer is better when dealing with R4s. Try getting an 'or-later core, ideally one from the early '90s, as GM continually upgraded them over the years. Pick Your Level of Strengh There are lots of aftermarket high-performance parts and OE upgrades including those from the later-model 4L60 and 4L60E transmissions to choose from, but unless you're running a really healthy motor or punish your tranny on purpose, most likely not all of the available trick parts are necessary.
Perhaps the main reason for not using all the good stuff is cost.
TH350 vs. TH400 vs. 700R4
On the other hand, the resulting tranny is said to outlast a stocker by quite a bit. Normally, a stock R4 or 4L60 would survive maybe 30, miles of trail use and twice that on the highway, according to Flash, but you can expect triple that amount with the components shown in this story.
Forums Photos Videos Industry Videos. Building a Better THR4 Parts and knowledge exist to make them really strong -- but it took some serious searching.
This is what I have: 88 Chevy, converted to carb. Probably makes about hp. Rear end is either a or aI pick it up next saturday. This is all going in my 51 Chevy.
The car is a total cruiser, but a little off the line grunt would be fun. So I need to figure out which of these trannys would suite me best. I can get them all from a local rebuilder for the same price and with the same warranty. The r4 has the OD gear which is nice, but I think the case is bigger, and I am not sure if it will fit the tunnel. I know the th will fit, but its only a 3 speed.
Last edited: Aug 7, The will fit places the other have difficulty fitting size. It is also the most forgiving in setting up.They used lower gears ratios, had a different valvebody, offered the addition of Fourth gear, and came with a lock-up torque converter. The next year, the case was redesigned with a bolt-on bellhousing and six-bolt tailshaft and a change to the solenoid, making 'and-newer 4L60E transmissions not interchangeable with previous models.
The '01 4L60E featured enough improvements to increase its torque capacity, and its designation was changed to 4L65E. The main improvement of interest to hot rodders is the 4L65E's five-pinion planetary carrier that replaced the 4L60E's four-pinion.
More pinion gears help to spread the load, allowing 4L65E transmissions to handle more torque than their 4L60E brethren. Additionally, a better clutch, improved input shaft, and a deeper pan for more fluid were added. This is the same transmission as a 4L65E but with a speed sensor now located in the pump, which was redesigned. Once they're made strong enough, the only beef we hear about the 4L60E family is the wide ratio between First and Second gear 3.
As Mark Walk at Gearstar says, "It leaps like a deer. Modified transmissions are rated at "levels" from Two on up. The breakdown of which mods go into each of Gearstar's upgrades can be found at its website, Gearstar.
Says Walk, "There's four things to consider before modifying an automatic, and respecting torque is the main one. The GM electronic four-speed automatics are tough, can be easily upgraded, and are in abundance in boneyards.
As stout as they are, eventually you reach the inherent limits that a 4L60E or 4L65E transmission is designed to withstand, which is around hp at Level 4. The GM nomenclature for the 4L60E works out like this:. L: Denotes longitudinal mounting rear-wheel drive ; transverse applications front-wheel drive are labeled with a "T".
Spotter's Guide - R4 Vs. Thom Taylor writer. E: Electronically controlled valvebody. Share on Facebook Share on Twitter.Good or bad??? May 25, 1. Messages: Likes Received: 0. May 25, 2. Messages: 10, Likes Received: 9. May 25, 3. Messages: 15, Likes Received: 1, May 25, 4. May 25, 5. Messages: 22, Likes Received: May 25, 6.
Messages: 3, Likes Received: Im doing the R4 in mine. I think you will be quite happy with one, but do the version that doesnt require the extra electronics. May 25, 7. Messages: 2, Likes Received: 0. I ran a r4 behind my big block, hp tq, only changed to 4l80e when we doubled the power. May 25, 8. Messages: 8, Likes Received: I would build s but were extremely busy with a week backlog doing almost exclusively 4L80Es and TH's.
I'm training 2 new builders and re-implementing the Rs into our available builds, as well as some Powerglides and 4L60E's.
I would build a R4 for a local customer, particularly if we were doing the install. In the past I have warranteed transmissions that the cause of failure was obviously a TV related issue. I'm no longer willing to do so. If the installer makes the mistake, they pay for it. May 26, 9. Hey thanks everyone for the replies. I will get in touch with Jake and talk about what I will need. Will I get good performance and a good firm shift if I am stepping on the throttle for fun? Thanks guys May 26, Messages: 1, Likes Received: 0.