TRANSGO SK 604 Non VLP 604/41TE and 606/42LE 1989-2006 Also Fit 42RLE 2003-2006 Instructions

TRANSGO SK 604 Non VLP 604/41TE and 606/42LE 1989-2006 Also Fit 42RLE 2003-2006

This kit does not fit models with a Pressure Control Solenoid!
Models with Pressure
Control Solenoid
(VLP Models)
Use SK 42RLE-VLP
Fits 42RLE & 604 VLP
Models.

Corrects / Prevents / Reduces

Delay or No Forward or Reverse, Rough Coast Down 4-3, Stabilizes Clutch Pressure & CVI’s.

Working on 604 or 42RLE VLP model that has a Pressure Control Solenoid
Order P/N SK 42RLE-VLP Fits: 2006up 604 and 42RLE VLP Models

Hello Mechanic — We LOVE this trans.
From 1989 we got hundreds of calls–The trans would go to Limp or burn OD clutches. At first we thought there must be BIG errors in the system that wecould find/fix. We bought a van, installed 6 gauges, a scan tool. While installing dozens of parts we received from shops we managed to burn it up 20 times in 60,000 miles of road testing.
For the first time in 35 years we had a trans control system that was Intelligent & adaptive. It took us two years to catch up with it. It had no BIG system errors, but it does have about ten things that need your careful attention. This trans loves the little things you do for it, so that it will shift good, stay out of Limp and please your customer.

If trans is in vehicle skip Step 1.

Step 1
Discard OE Housing Gasket. Install new Non Shrinking Gasket under Piston Housing. Gasket works with all piston housings.

604/41TE, 606/42LE & 42RLE

Do NOT use Plastic Accumulator Pistons! All 1989-2006 must have aluminum pistons!

Step 1 Install new Expanders & Seals on the CLOSED END of Aluminum Accumulator Pistons.
Step 2 Install Large Spacers into OD & UD Springs.
Tech: Installing Spacers causes shifts to be shorter and cleaner. It does this by allowing the releasing Clutch to exhaust faster.

604/41TE Only

Hole A &B
Should be: .101 to .107. Resize as needed.
Hole C: Optional Shift feel
Shorter high throttle 1-2 and cleaner 2-3 and 2-1. Enlarge hole .076 to .078

606/42LE & 42RLE Only

604/41TE, 606/42LE & 42RLE

VLP Check-ball layout & PR lineup are different than shown.
Use SK42RLE for 42RLE & 604 VLP Models.

604/42RLE 4th Type** Stack-up

UD clutch: Has four .073 thick frictions. High Energy/Brown Paper
OD clutch: Has four .073 thick frictions should be High Energy.
Reverse clutch: Has two .073 frictions High Energy/Brown Paper
UD stack- Start with .068 steel plate, alternate .073 clutch plates, the stack will end with a friction. Install .061” flat snap-ring, 4th design UD/OD Pressure plate then tapered .090 snap-ring.
OD stack- Start with .073 friction plate, alternate with .068 steel plate. The stack will end with a friction plate. Install waved snap-ring, OD/Rev Pressure Plate then install flat snap-ring.
*Rev stack- Start with .073friction, .068 steel, .073 friction, Pressure Plate and flat selective snap-ring.
Selective Rev Snap Rings: 1.53-1.58mm- # 04377195, 1.77-1.83mm- # 04412871, 2.02-2.07mm- # 04412872, 2.27-2.32mm- # 04412873.
**Earlier stack-up- Types 1 through 3 can be found in the SK 604 kit Additional Information Lesson 3A
Note: Some small engine models can come equipped with only 3 OD clutches & 1 Reverse clutch. This stack-up is not covered here. Use your specific vehicle data when ordering replacement parts .

Documents / Resources

| TRANSGO SK 604 Non VLP 604/41TE and 606/42LE 1989-2006 Also Fit 42RLE 2003-2006 [pdf] Instructions
SK 604 Non VLP 604 41TE and 606 42LE 1989-2006 Also Fit 42RLE 2003-2006, SK 604 Non VLP 604, SK 604 Non VLP 41TE, SK 604 Non VLP 606, 42LE 1989-2006 Also Fit 42RLE 2003-2006
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