I need help with a 67 wiper problem, its mechanical not electrical. I’ve got a couple inches of play on the drivers side wiper arm. It appears the play is in the transmission (the splined shaft), I do not see the same movement on the short transmission arm underneath the dash (hopefully I explained that where it makes sense). My question is, if I remove the transmission (the splined shaft) do I have to disconnect the long arm from the wiper motor and take the wiper motor arm and transmission out as one piece? I can’t see where the long arm from the motor connects to the transmission well enough (its an A/C car) to tell how it connects or if it can be disconnected there, I would think it could. Next question; can the transmissions be rebuilt? None of the vendors I’ve looked at offer the transmissions. Does anyone know where they can be purchased or who rebuilds them? Thanks in advance for all the help.

 

Underneath the dash area the long arm connects to the transmission by way of a ball socket assembly that is not designed to be separated.

The removal process is to remove the wiper arm from the outside, take the one nut off the wiper motor shaft at the center of the dashboard, behind the wiper motor, and take out the three bolts that hold the wiper transmission assembly in place. Then the wiper transmission, with the long driving arm attached, removes from the inside of the car.

The condition you are describing sounds like on the outer end of the wiper transmission shaft, where the splined area is that the wiper arm slides over, the splined cap is slipping on the transmission shaft. That splined cap is attached onto the transmission shaft by way of a swedged on method that can fail.

I do not know of a cure for this, other than replacing with a different wiper transmission. They can be found at swap meets and corvette junk yards, having been removed from wrecked vehicles.

Because I personally do not know of a cure does not mean that there is not one. A qualified machinist or machine shop might be able to fix the problem I have indicated without major difficulty once the transmission assembly has been removed from the car.

The wiper transmissions on my car were stiff so I drilled a hole into the side of the aluminum housing and forced lubricant into the housing and worked the assembly until it was nice and free. Then I cleaned the hole with a degreaser and filled it with silicone. They spin nice and free now but I can relubricate them if I need to.

I have a machinist friend who ground the swedges off his wiper transmissions in order to disassemble, clean and lubricate the assemblies. He has them disassembled but has not yet put them back together so I don't know how he intends to reassemble the splined caps back onto the transmission shafts as a fixed assembly.

Someone else will probably give you the full poop on this issue.

Good luck

Rich

 

It's 1 piece. The long arm is connected with a ball pivot.
You'll probably have to take out the gauge cluster and steering wheel to get at it.
It could be that a couple of the mounting bolts are just loose which is causing the play.

 

Thanks guys for the reply. With my luck, I was afraid the transmission and motor arm had to be removed together. Does anyone know for sure if they can be removed without removing the cluster. Maybe by just removing the glove box and pulling it out toward the passenger side.

Also if anyone knows of a fix for this without removing the trans...please let me know. Thanks

 

I would be interested to see exactly where you drilled. I have 2 wiper transmissions that I can move but could use some lube
thanks

 

You can make a wiper transmission 'greaser' with a short length of hose (1/2"?) a hose barb, a pipe coupler, a bushing (or two) and a zerk fitting. Push the hose onto the the transmision and secure with a hose clamp and apply grease with a gun. Worked for me.