*NEW PRODUCT 1984-88 Corvette 5-Speed RS PerfectFit® Kit - Auto | Keisler PerfectFit™ RS® and TKO Kits | (C4) 1984-1988 | Corvette | GM | Keisler Engineering, Inc

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(C4) 1984-1988

Keisler PerfectFit™ RS® and TKO Kits

*NEW PRODUCT 1984-88 Corvette 5-Speed RS PerfectFit® Kit - Auto

Ordering

To ensure order accuracy, please call us to order or use our Request A Quote form to get a price quote within 24 hours.

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1-865-609-8187

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The Keisler RallyeSport 5-Speed PerfectFit® System is the easiest way to convert your automatic 1984-1988 Corvette to a modern 5-speed overdrive transmission. .

Based on the advanced Borg Warner T-45 5-speed built from 1996-2001, the remanufactured Keisler RS® revolutionizes this transmission design, incorporating the robust BW T-56 carbon fiber synchronizers to all gears including reverse. Plus, new SAE 9310 chrome-nickel-moly steel alloy gears (when required), CNC ground in the USA provide high torque, silent operation.

Carbon fiber lined synchronizers provide 7000 RPM silky smooth, low effort shifts, and reverse is also synchronized. Single rail architecture with Guide Plate means you won’t miss a shift, especially the 2-3 at the track. OEM proven high mesh gear design provides nearly silent operation. Enjoy the new best-in-class 5-speed Keisler RS® at a price that beats the competition every time. One drive with the Keisler RS® and you won’t want anything less.

NOTE: Customer must supply pedals and clutch linkage.

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 1984-1988 Corvette 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 is STANDARD – not an extra cost upsell.
Bolts up to standard Chevy bellhousings.
Custom designed shift tower and tailhousing to fit your floor tunnel mith minor modifications. Template and sheetmetal are provided.
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. TORQUE ARM BRACKET - Heavy duty billet steel, black powder coated.

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

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

5. SPEEDOMETER CALIBRATOR MODULE - Preset for correct speedo calibration; user adjustable.

6. SLIP YOKE AND U-JOINT - Heavy duty Spicer slip yoke and u-joint for connection to your original driveshaft.

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

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 Disk (with latest technology environment friendly friction material), sealed release bearing, lube pack.

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

14. HYDRAULIC CLUTCH CONCENTRIC SLAVE CYLINDER - modern OE-quality slave cylinder with 1 million cycle life expectancy, rated to 7000 RPM.

15. SHIFT HANDLE - Original finish black anodized handle with black Hurst ball.

16. SHIFT BOOT AND TRIM RING - Quality rubber boot and stamped trim ring.

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

18. 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

*NEW PRODUCT 1984-88 Corvette 5-Speed RS PerfectFit® Kit - Auto

Overview-Ordering

Click to enlarge

Speed Analyzer

5-SPEED TRANSMISSION ANALYZER

1. Pick your TKO:	RS 400/500 3.37(1st)/.67(5th)	(Reduction in RPM: 33%)
	RS 600 2.80(1st)/.67(5th)	(Reduction in RPM: 33%)
	TKO-500 3.27(1st)/.68(5th)	(Reduction in RPM: 32%)
	TKO-600 2.87(1st)/.64(5th)	(Reduction in RPM: 36%)
	TKO-600 2.87(1st)/.82(5th)	(Reduction in RPM: 18%)

2. Pick your tire size: / R-

3. 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 Accelerates like:	Stock Final Gear	KEISLER
	rear	mph	mph
	rear	mph	mph
	rear	mph	mph
	rear	mph	mph
	rear	mph	mph
	rear	mph	mph
	rear	mph	mph
	rear	mph	mph
Rolling diameter for selected tire: inches
KEISLER Gear Set:			Torque:
Doug Nash 4+3 Gear Set: 1st=2.88:1; 4th=1:1

Testimonials

Recent Testimonials...

Mike Campbell - '59 Corvette

Here's some pictures of my 59 Vette with a 520hp/427cu.in. fuel injected small block built by Pfaff Racing Engines hooked up to one of your Tremec 5 speeds, chassis built by Progressive Automotive, 2" dropped spindles, disc brakes, hyd. clutch, MSD ignition, Mattson alum radiator with electric fans, 9" Ford readend, positraction, American Racing wheels, took the door and window crank handles off, reworked the door posts to remove the window tracks and made custom pieces for the top of the doors to cover where the door glass was, the car is now a true roadster with no windows but can still put the hardtop or softtop on the car, custom machined billet valvecovers and air breather made to my design, all custom leather interior by Ron Mangus in CA. The car is an absolute BULLET!!!
Mike

See Mike's other car HERE !

Dwight Simon - '71 Vette

My happy story. After researching the various 5 speed companies offering a C3 Corvette conversion kit from an automatic to a 5 speed I choose Keisler Engineering for three reasons. 1. After a couple indepth conversations with Gene and Jeff at Keisler Engineering, I became convinced they offered the best COMPLETE KIT product. 2. ALL the parts required to change out my 700R4 trans to a five speed came in one kit. 3. Gene accurately recommended a competent local installer called Big Hemi Customs in Ft Wayne, In. At Big Hemi I spoke with Jason and became convinced they could complete the swap easily. Previously, the 454” small block from World Products was dyno’ed at the rear wheels with at 376 HP and 412 lbs of torque with the automatic. Gene suggested the TKO 600 with a 0.64 5th gear as the vette’s rear end is 4.11. He also helpfully suggested a few additional parts to really complete the install such as new tunnel insulation and new manual shift plate. I had The 5 speed kit shipped to Big Hemi whose crew did an outstanding job of making the swap. Attention to detail was super. By that I mean they repainted the shifter console and also fabricated new console support brackets making the install very professional looking. Additionally, when I dropped off the Vette at Big Hemi - Jason suggested swapping out the Holley carb for an EFI unit because of the cam overlap and idle problems I’ve had. Long story short – I purchased a Powerjection III EFI from Summit and had it sent to Big Hemi. They installed it easily and it runs real well. The trans allows me to cruise at 70 mph at 2100 rpm while the EFI makes the motor have civil street manors. I especially like the smooth shifting trans, zero vibration and stock looking shifter. I would strongly suggest the Keisler trans swap to anyone wanting to upgrade their pride and joy. I’ve include an assortment of pictures that you may use as you may see fit.
Thanks,
Dwight Simon

See more testimonials >