Kit Components

A truly complete conversion combining the stock Tremec 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 instructions 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 Chevelle, El Camino, GTO, 442, or other 1964-67 GM A-Body.

1.  TRANSMISSION - NEW UNMODIFIED TREMEC TKO-600 (600 HP/600 LB-FT), with original Tremec shift mechanism OR optional Keisler ClassicFit™ Offset Shifter.

• Provides two possible shift positions, at 16.75" or 19.5" from the rear face of the bellhousing.  Transmission tunnel modification will be required.
• Optional Keisler ClassicFit™ Offset Shifter provides the same correct shift lever attachment point as our premium PerfectFit™ series, but in a lower cost "bolt-on" package. Modification of the transmission tunnel will still be required. (Note: If you desire minor or no modification, please see our PerfectFit™ series of transmission system.)
• Muncie / Borg-Warner GM bolt pattern and input shaft configuration for direct bolt-up to the factory Chevrolet bellhousing (requires a 1-1/8" x 26 spline clutch disk).
• 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).
• 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.  INSTALLATION HARDWARE KIT - High strength Grade 5 and 8 fasteners, properly sorted, bagged and labeled for easy reference.

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

11.  3 YEAR 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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Keisler's ClassicFit™ Kit is a great lower-cost alternative to the PerfectFit™ Kit for the car owner who will not be using a center console. The ClassicFit™ Kit includes all the same high quality components as the PerfectFit™ Kit, but with a non-customized transmission. Requires modification of the factory transmission tunnel and provides an on-center shifter position.

Optional Keisler ClassicFit™ Offset Shifter is now available! It provides the same correct shift lever attachment point as our premium PerfectFit™ series, but in a lower cost "bolt-on" package. Modification of the 4-speed shifter hole is required for some applications. (Note: If you desire minor or no modification, please see our PerfectFit™ series of transmission systems).

FAQ: What is the difference between the Keisler ClassicFit™ Offset Shifter and Keisler PerfectFit™?

Keisler PerfectFit™ is a version of the Tremec transmission that is heavily customized by Keisler. The aluminum main case is machined to fit the larger Tremec transmission into the factory tunnel with minimal or no modification to the car. The PerfectFit™ shifter is Keisler's custom design, and is physically relocated directly below the tunnel hole to give the shortest throws, which are also symmetric left to right and front to back. The Keisler PerfectFit™ gives the best fit and shift quality of any custom Tremec solution on the market - Period.

Keisler ClassicFit™ Offset Shifter emulates the PerfectFit™ shifter handle position, but the Tremec transmission is bone stock otherwise. With the Keisler ClassicFit™ Offset Shifter, as with ANY bolt-on offset shifter, compromises are made to the overall result - mainly in the the amount of tunnel modification to fit the transmission case, the amount of the shifter hole modification, and shifter throws being slightly compromised because the pivot joint is on the centerline of the tunnel rather than being directly below the factory 4-speed hole. This is most important when converting a factory 4-speed car, and you don't want to modify the car any more than absolutely needed.

The Keisler ClassicFit™ Offset Shifter is designed to be the "best in class" custom offset bolt-on shifter at a price that is at or below comparable bolt-on shifter offerings from other companies.

Enjoy low-rpm cruising, great fuel economy, and less engine wear with the TKO-600 5-speed overdrive!

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!"