TRANSGO 7D Series SK CD4E-Jr Shift Kit User Guide

TRANSGO 7D Series SK CD4E-Jr Shift Kit

Converter Slip and Code 628
Drum Blow-out due to run-away line pressure. Bushing wear due to accidental Lube cut-off. Kit corrects/prevents the pressure run-away caused by cross leaks, sticking EPC, or electrical malfunction that blows out the forward drum, and gaskets or breaks the pump shaft. Kit corrects low Converter and lube flow that causes Code 628 and fast bushing wear. Don’t let all the papers in the kit fake you out. Kit installs quickly and easily. The lengthy info is to prevent hard part re-work.

2-4 Servo [Band Adjustment]
Listen: Be careful. Go buy a Stone Age “C” clamp. It makes the servo job really easy.

Step 1
Disassembly: Insert the clamp arm just beyond the steel bracket bolt. Do not put the clamp into an oil circuit. Squeeze the cover in with the clamp and remove the snap ring.

Step 2
Assembly: Squeeze the cover in with a clamp. Then install the Adjustment Washer and snap ring. With this kit, a new forward drum, and some bushings this job will be twice as good as new. So don’t quote it cheap.

Main VB

Step 1
Remove all parts in the PR Valve bore. Measure land “A” on your PR valve. If Land “A” measures approx .472, proceed to Step 2. If not, the valve body has been bored for an oversized PR Valve. STOP! You will need to change the main body with an unmodified, main body and main plate (if the plate was drilled). The bore at “A” erodes oversize. The converter and EPC then mix which causes high line pressure and converter slip with blinking OD light-Code 628. No worries! You’re fixing the problem with this kit!

Heads Up!
High Gear Starts in Man 1 Installing the wrong VB can result in a High gear start in M1 that may feel like a bind-up. The solenoid firing order in M1 is different for the “F6” & “F3” valve bodies & must match the computer strategy. VB ID by Casting Number

93-96 Casting # starts with “RF-F3” and has a “Pull-in Control Valve”. 97up Casting # starts with “RF-F6” and does NOT use a “Pull-in Control Valve”. Designs match

Step 1
Clean the TCC control valve bore and replace the original spring, bushing & matching valve with a NEW small Orange spring & NEW matched TCC valve & bushing and reassemble. Computers!

Step 2
Clean Converter Reg bore and replace the original spring, with a NEW LARGE Orange spring and reassemble.

Accumulator Valve Body

Step 3
Clean & Lube (PR) bore. Install PR Valve fully into the bore. Install NEW PR Bore Bushing with small hole outboard. Install NEW Red spring & New assembled EPC Relief Assy.

A small loop of a paper clip installs the spring easily. Install the Cotter pin & then pull out the paper clip with pliers.

Step 1
Drill Holes: 1, 1a, 2, 3, & 5 with .063 (1/16”) drill furnished, OK if already bigger. Don’t skip any steps! You need to know: On a 10-block road test this trans will not act differently than without the kit. However: On a HOT trip, without the kit, this trans will probably abort lockup and suffer lost lube flow. “Thanks for Listening.” Gil

READ THIS: CD4E Repair Data

This is a great little trans. You are going to see a lot of them. We are confident that the upgrades in the SK® kit will correct the hydraulic mal- functions including run Away line, the accidental cutoff to converter apply and lube, the blinking light, the converter slip, and Code 628/PO741. However, there are also problems with hard parts that need your attention. Some shops have been installing a new solenoid pack and a valve body plate upgrade from Ford. We have no reports that these items fix or prevent the complaints. Spend the money for hard parts instead.

Forward Drum
A common failure is the forward drum. The end blows off due to runAway line pressure. The driving complaint is a rough 1-2 shift when HOT. A new valve body may correct it for a while. The permanent FIX, for the runAway line, is the TransGo SK® CD4E-Jr Kit.
ALSO: The welds in this drum often crack with high miles in normal use. It’s a good idea to install a new drum. Don’t forget to add the lube ring, new drums come without the lube ring.

Bushings
The drum bushings are usually in bad condition from lack of lube or bad connection at the ground strap. This kit will restore lube flow and cooling, but its up to you to file clean the block and the ground strap. Because the bushings are not blue, from overheat, you may be tempted to reuse them—Don’t. Loose bushings allow 2-4 band to push the gear train off-center and the rings will then deform and leak.It may look like the rings ate into the drum. The truth is; Loose bushings allow the TOP of the ring lands to eat into the drum bore—not the rings. LOOK and LISTEN: if the two places where the ring rides are still smooth and at least 1/16″ wide, you can re-use the drum by installing new bushings.

Repair Information Continued

Listen Up: To prevent lube cut-off problems careful assembly is required. Notches in Reverse Hub must align with Lube holes at forward splines .

Don’t make a sad Story: You’d fill most trans’s to the COLD mark knowing it will come up HOT. If you do that with this trans you may see it burn down on a hot trip. WHY? The COLD mark, on this trans, is the high one, not the low one. BECAUSE: This trans has a temp-controlled flap valve that causes fluid level to go up in the side pan and down in the sump to prevent foaming when re-ally HOT. As much as 2-1/2 qts can be held in the Side pan.

Correct Fluid Level: After your repair, BEFORE the trans gets hot, run it 20 seconds in PARK and bring the fluid level to the COLD/top mark. On the road test, the level will go DOWN slightly as the trans warms, but even very hot it should never be more than 3/8″ below the COLD mark. Pressure Ports: A= Differential lube B= Front Lube

Hot Trip Complaint: Rough 1-2, no Lockup, blink-ing light, and/or Code 628/PO741. AFTER the SK® Kit is installed this could be a lockup slip or a 10-15%ignition miss. Without the SK® kit you won’t fix it. Check 628/PO741Code like this: Gauge port “C”. Drive till hot. At 200F Port “C” should be at least 70 psi with the light throttle in 4th. Restart to clear the code. Drive 65 to 75 mph, in lockup, and watch tach while adding throttle. If rpm comes up without an increase in car speed, the converter is slipping.The line Pressure port is fitting next to the pump: Remove the fitting. Drill it 11/32″ and tap it with a 1/8″ pipe tap. Now, your gauge fits it. Operating line pressures when HOT: Forward gears: Min 53-70 Stall 170-200 Park, Rev, “N”: Min 68-90 Max 280-300

Both you and your R&R person must read this

1994 to 97 4cyl Probes and Mazda 626’s have a serious ground strap problem that will eat this trans up in a few days—Unless you prevent it. It may look like a lack of lube, but the cause is the engine is starting through the bushing and the gears instead of through the ground strap. The parts shown are out of trans that came back three times.

Engine Ground Strap Pad File the pad and both sides of the ground strap. The car factory put a lock tite here which can insulate the strap. Remove the ground strap that goes from the battery to the fender. Clean the paint and the strap and reconnect it.

How to check for solid ground: Attach a volt meter from the negative terminal of the battery over to the trans. It must read .09V or less, even while starting the engine.

CD4E & LA4A-EL Electrical Data

If trans slipped or failed PCM may be com-manding LIMP or late/hard shifts in a high-pressure mode. Before startup and fluid fill: Cleanse PCM with this routine: Disconnect the positive battery cable. Touch it against the engine and the body, then let it hang. Turn the ignition switch on and hit the brake 4 times. Reconnect the battery cable. No 4th/lockup when hot: Above 60,000 miles consider new plugs and wires.Limp Mode: Or No power to PCM; Or No signals from PCM. Has high line pressure: “D” is 3rd “2″ is 3rd ”1″ is 2nd No lockup or 4th.Shift Sol Complaints: Pressure gauge must be attached: While driving at 40mph line pressure must go up and down with throttle and must come down to 53-68 with lift throttle. If the lift throttle is above 53-68, don’t fuss with shift sols.———Check /Fix pressure first———

Connector in the Trans

Ohms Function Pin

• Varies Temp Send 1
• Varies Temp Return 2
• TCC Grand 3
• 94/95=1.-3. TCC Grand 4
• 96/97=12-20 SS2 Grd Sol 4
• 12-22Power SS1 5
• Grid 6
• 12-22 3-2T/CCS grd 7
• 3.7-5.9  EPC Power 8
• 3.7-5.9 9

Break out shifts: 12V to 6 Ground: 5&7= 1st 5= 2nd None= 3rd 7= 4th

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