Kit Components

A truly complete conversion combining the Keisler PerfectFit^TM transmission  with all of the correct matched 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 manual transmission systems - is the first step in the best driving improvement you will make to your full-size Chevrolet.

1.  TRANSMISSION - NEW TREMEC TKO-500 (500 HP/500 FT-LB), customized by Keisler to fit your 1958-1968 Impala, Biscayne, Caprice, or Bel Air. A number of custom features are included (with no hidden charges) that you won't find anywhere else, including:

• Shifter location custom designed for your 1958-1968 full-size Chevrolet.
• With the Keisler-modified top cover and tail housing, MINIMAL CUTTING of the 4-speed tunnel is required (depending on your particular vehicle). A KEISLER EXCLUSIVE FEATURE!
• Works with your original carpet and console.
• Custom short-throw internal shifter mechanism designed to provide better-than-stock shifting.
• Muncie / Borg-Warner GM bolt pattern and input shaft configuration for direct bolt-in installation.
• Gear Ratios: 2.87 1st, 1.89 2nd, 1.28 3rd, 1.00 4th, .82 5th; 2.56 reverse.
• Low RPM Cruising - 18% drop in engine RPM in 5th gear (check out our Speed Analyzer).
• Precision Assembled, TRIPLE Quality Checked - assembled at Keisler by our trained technicians; 100% inspected for function, leak and visual appearance (check us out).
• Nation-Wide Parts & Service - Parts in-stock; service in-house.

2.  PILOT BEARING - Needle Roller Bearing for long life and high capacity.

3.  ISOLATOR - Heavy-duty rubber isolator. Polyurethane upgrade available.

4.  BACK-UP LIGHT WIRING HARNESS - Easy coupling to factory wiring.

5.  NEUTRAL SAFETY START SWITCH - Can be wired into starter circuit if desired.

6.  SPEEDOMETER CABLE & DRIVEN GEAR - Mechanical speedometer cable and correct driven gear PLUS integrated 2-wire electronic output included. Optional electronic wiring harness also available (for use with electronic speedometers or EFI).

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

8.  SLIP YOKE - Heavy duty Spicer slip yoke.

9.  TUNNEL TEMPLATE AND SHEETMETAL - Marking template shows you exactly where to cut your tunnel if needed, and replacement sheetmetal pre-cut to the correct size and shape is provided.

10.  INSTALLATION HARDWARE KIT - High strength Grade 5 and 8 fasteners, properly sorted, bagged and labeled for easy reference.

11.  INSTALLATION MANUAL - Highly illustrated step-by-step instruction manual.

12.  6 MONTH WARRANTY - 2 years to activate (in case you are restoring a car)! Extended warranty available at extra cost. Best Customer Support in the Industry.

100% Customer Satisfaction Guaranteed

• The best Customer and Tech Support in the industry
• Lifetime Tech Support from our premier experienced staff

Overview-Ordering

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The Keisler PerfectFit™ System is the easiest and most complete way to put a high strength, modern overdrive Tremec TKO 5-speed transmission in your 1958-1968 Impala, Biscayne, Caprice or Bel Air. Our Keisler Custom Engineered PerfectShift™ Tailhousings and Shift Mechanisms provide the smoothest operation, the shortest throws and the optimal fit for your 1958-1968 full-size Chevrolet, with minimal modifications to the 4-speed floor tunnel. Enjoy a PerfectFit transmission with low RPM cruising, and great fuel economy today.

Unsurpassed quality of design, components and build are included with every Keisler PerfectFit™ System.  Enjoy low RPM cruising and fun shifting, 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 1958-1968 full-size Chevy!

Speed Analyzer

Testimonials

Recent Testimonials...

LEON CHERRAULT - '70 CHEVELLE

Installed by Rooster's Rod Shop '70 Chevelle 502, TKO600 Dennis at Rooster's Rod says "Delivered the car back to Leon last night and he seemed to be very happy.  He liked how it shifted and performed.  Another satisfied customer.  Good job Gene and Keisler!"