1970-1974 E-Body Stage 3 (650 LB-FT) Automatic Overdrive Kit

Kit Components

A truly complete conversion, combining the Keisler PerfectFit^TM transmission system with all of the correct matched accessory parts that have been carefully selected and tested by Keisler for guaranteed quality and performance.

Drivetrain component selection and installation instruction and support is critical to get the job done right. Rest assured, buying from Keisler - the leader in overdrive transmission systems - is the first step in the best driving improvement you will make to your Mopar E-Body.

1. TRANSMISSION – Custom-engineered electronically controlled Hydra-Matic 4-Speed automatic overdrive, built to withstand today’s high-performance engines up to 650 LB-FT. of torque. Provides modern driving quality without sacrificing the stock look, with a 30% RPM drop in 4th gear (check out our Speed Analyzer). Gear ratios:

3.06:1 First
1.63:1 Second
1.00:1 Third
0.70:1 Fourth

Bonus: You can hold 1st gear by pulling the lever into 1, and get awesome launch control!

2. LOCK UP TORQUE CONVERTER – Electronically controlled to give you lower RPM’s, longer transmission life and quicker reaction to your right foot!

3. FLEX PLATE - SFI-approved flex plate with correct balance and bolt pattern for your particular application.

4. CROSSMEMBER – Heavy-duty formed steel, MIG welded box construction with zinc coated finish.

5. ISOLATOR – Heavy-duty rubber isolator, polyurethane upgrade available.

6. TRANSMISSION CONTROLLER – Compact plug and play unit pre- programmed to match your driving style. Intelligent computer monitors your throttle and vehicle speed to provide transmission performance that meets your demands – from easy cruise with softer shifts – to tire blazing, spine tingling firm shifts – all in one transmission solution. The best of both worlds – comfort and performance!

7. DRIVESHAFT AND SLIP YOKE - Lightweight high strength steel, automatic welded and computer dynamic balanced with premium solid sealed U-joints and heavy-duty Spicer slip yoke, painted satin black, certified and serialized. Built in-house on Hines driveshaft manufacturing cell for the ultimate in quality and craftsmanship!

8. THROTTLE POSITION SENSOR (TPS) – Bolt-on unit provides throttle feedback to computer with just 3 wires. Eliminates the woes of yesteryear’s technology, such as mechanical kick-down linkages or Throttle Valve (TV) cables, which can be difficult to adjust by trial-and-error and will cause transmission damage if not adjusted properly.

9. SPEEDOMETER OUTPUT – Mechanical speedometer cable and correct driven gear, calibrated for your vehicle's tire size and differential ratio.

10. PLUG & PLAY HARNESS – Simple to install with all weather tight, modular connections.

11. SHIFTER CONVERSION KIT – Includes all necessary parts to convert your original 3-speed automatic shifter to a 4-speed shifter. Retains the original shifter handle, console, and top plate for a factory-original look.

12. LOCKING DIPSTICK AND TUBE – Original Equipment style; Dress-up options available.

13. PRE-BENT STEEL COOLER LINE SET – Replaces the factory lines.

14. INSTALLATION HARDWARE – High strength Grade 5 and 8 fasteners, properly sorted, bagged and labeled for easy reference. Everything you will need – no trips to the local hardware store required!

15. AUXILIARY TRANSMISSION OIL COOLER - Stage 2 and Stage 3 transmissions come with a high-performance auxiliary transmission oil cooler to help meet the demands of higher horsepower engines.

16. INSTALLATION MANUAL – Easy to understand, highly illustrated instructions for a smooth installation.

17. 12 MONTH/12,000 MILE WARRANTY - Covers R&R labor and shipping - Best warranty in the business!

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1970-1974 E-Body Stage 3 (650 LB-FT) Automatic Overdrive Kit

Overview-Ordering

Click to enlarge

The Keisler 4-speed Automatic Overdrive System - the best upgrade available for your 1970-1974 Mopar E-Body. This complete transmission solution provides you the driving quality of a late model car with a no-cut installation. It features the latest in plug-and-play electronic controls and is a PerfectFit with any Mopar Small Block, Big Block, traditional Hemi or new Hemi. This is everything you need for a turn-key installation, and even retains the use of your original column, floor or slap-stick gear selector and console.

Enjoy the benefits of an automatic overdrive transmission now:

Faster acceleration – gets your E-Body moving quicker with a 3.06:1 first gear and engine-matched stall converter that makes your car more responsive and fun to drive.
Low RPM cruising – drops your engine RPM by over 30%, allowing you to keep your performance rear axle ratio and still drive on the highway (check out our Speed Analyzer).
Better fuel economy – up to 40% due to the overdrive fourth gear and the lockup torque converter.
Reduced engine wear – lower RPM equals less maintenance cost.
Optimum shift quality – late model Hydra-Matic technology.

Unsurpassed quality of design, components and build are included with every Keisler PerfectFit™ System. Enjoy low RPM cruising, while getting the benefits of reduced engine wear and tear. Join thousands of customers that say

"The Keisler PerfectFit™ Transmission System is the Best Upgrade for your Mopar E-Body!"

Speed Analyzer

Typical 3-speed automatic vs.
Keisler 4-speed automatic

New transmission:

Keisler 4-speed automatic (.70 OD)

1. Pick your tire size: / R-

2. Pick your cruising RPMs:

Results: The Best of Both Worlds!

Low Gear Acceleration AND Low RPM Cruising!

1st Gear Comparison		Final Gear Comparison
Stock Differential Ratio	Keisler Automatic Accelerates like:	Stock Final Gear	Keisler Automatic Overdrive
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Rolling diameter for selected tire: inches
Keisler Gear Set:			Torque:
Chrysler 727 Gear Set: 1st=2.45:1; 2nd=1.45:1, 3rd=1:1, 4th=n/a Keisler 4-speed Auto. Gear Set: 1st=3.06:1, 2nd=1.63:1, 3rd=1:1, 4th=.70:1

Testimonials

Recent Testimonials...

Mark Halbach - '70 Cuda


We used the Keisler 5-speed in the car. It was an absolutely seamless install and the performance is top notch. The build quality of every aspect of the tranny kit is flawless. We were actually one of the first builders in the country to install the new HEMI. Shafi and his team were on the ball and got all the parts for us to use. Anytime a builder can lessen the headaches involved in an install, it is a plus. The Keisler kit allowed us to do that. Also, having modern technology in an old musclecar is everybody's dream. Driving a 5-speed HEMI Cuda always puts a smile on my face. Thanks Shafi and his team at Keisler! Mark Halbrach Janesville, IA