Kit Components

Brought to you by the leader in overdrive transmissions, the complete Keisler PerfectFit RS® transmission kit has been matched with all of the correct parts proven and tested by Keisler for guaranteed quality and performance.

With 20 years of experience you can count on us to be there for installation instruction and support. Join thousands of others and take your classic Tri-Five to the next level with Keisler!  The best driving improvement you will make to your car!

1.  TRANSMISSION - RS500 (500 LB-FT) or RS400 (400 LB-FT) built at Keisler’s factory. A number of custom features are included (with no hidden charges) that you won't find anywhere else, including:

• PerfectFit® shifter position in front of the bench seat is STANDARD – not an extra cost upsell.
• Bolts up to Chevy, Buick, Olds, and Pontiac bellhousings.
• Shifter location that fits your Tri-5 with NO CUTTING!
• Advanced, high feature compact shifter features adjustable solid stops, tunable cross gate spring bias, short-ratio lever throws, 4140 chrome steel alloy, Teflon bearings under all pivot shifter designed to provide better-than-stock shifting.
• Internal guide plate precisely guides the shifter through the gears. Never miss a 2-3 shift again!
• Gear Ratios:
  • RS500 and RS400 = 3.37 1st, 1.99 2nd, 1.33 3rd, 1.00 4th, .67 5th
• Low RPM Cruising - 33% drop in engine RPM in 5th gear (check out our Speed Analyzer).
• Precision Assembled, TRIPLE Quality Checked - at Keisler by our highly trained technicians, using high quality, American made gears; 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.  SPEEDOMETER CABLE & DRIVEN GEAR OR ELECTRONIC OUTPUT - Mechanical speedometer cable and correct driven gear OR integrated 2-wire electronic output with wiring pigtail included.

6.  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!

7.  SLIP YOKE - Heavy duty Spicer slip yoke.

8.  BELLHOUSING - Keisler designed & manufactured reproduction of the 11 inch '621' bellhousing. Made in USA of high strength cast aluminum-titanium construction, 50% thicker wall construction than factory, CNC machined; available for all Chevy V8s and GM LS engines.

9.  BELLHOUSING INSPECTION COVER - stamped steel, black powder paint; genuine GM.

10.  FLYWHEEL - Billet steel flywheel, computer balanced.

11.  FLYWHEEL BOLTS - Grade 8+ specialty flywheel bolts; with locking washers.

12.  CLUTCH KIT - Modern pedal effort diaphragm Performance Clutch Kit incl: computer balanced pressure plate, premium sprung hub Clutch Disc (with latest technology environment friendly friction material), sealed release bearing, lube pack.

13.  CLUTCH BOLTS - Grade 8+ specialty clutch bolts.

14.  PEDAL KIT - New reproduction clutch pedal assembly with rubber pad.

15.  MECHANICAL CLUTCH ACTUATOR LINKAGE KIT (Original Type) - clutch pedal pushrod, z-bar, return linkage, springs, clips, pivot ball (if required), frame bracket for pivot ball.

15(opt).  OPTIONAL HYDRAULIC CLUTCH ACTUATOR KIT (Modern Type, Recommended) - OEM reliability, high quality exclusive Keisler design; easier pedal effort than mechanical type; installs much easier than mechanical actuator, with no linkage required; includes: 1) quick release master cylinder with ball joint and adjustable push rod, 2) single stainless steel line-set with bleeder fitting, 3) high tech OE grade concentric self-centering double-sealed hydraulic release bearing (rated at 7000 RPM), 4) bellhousing dust cover & line bracket, 5) remote clutch reservoir with fluid baffle, molded cap, 6) DOT approved low pressure line, and 7) installation instructions.

16.  SHIFT HANDLE - High quality chrome shift handle and ball, for bench or bucket seats.

17.  SHIFTER BOOT AND TRIM RING - Molded rubber accordion style boot with chrome trim ring.

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

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

20.  1 YEAR WARRANTY - With a 2 year window to activate, allowing you ample time to build your dream car and get it on the road.   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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Speed Analyzer

Testimonials

Recent Testimonials...

Pat Johansson - '57 Chevy

Thanks Jeff and Keisler,
From a happy customer in Sweden...I went for a weekend trip to Norway, about a 12 hour trip to break in the gear box. Due to the 5-gear this was possible (big block and 4.10 rear axle) and something that was a big bonus, driving down the mountains, I could downshift to a lower gear and not overheat the rear drum brakes.  It's so fun to drive this stickshift car and maybe I take it to the track in late August and see if I can improve the quarter mile run. It feels like 700hp when I drive the car!!  The engine makes about 560-580 after upgrade.
Best regards,
Patrik