VW converter puzzles technicians Repeated pump drive failures can occur on the Volkswagen 01P transmission, usually found in ‘97 and later VW models, using the Dacco part number RE10 converter. If you are unsure on whether or not you are working on the RE10, the code OCDV or sometimes just DV, appears on the side of the unit. This is a lockup clutchtype unit.
Several theories have been given on the cause of repeated pump drive failure. First, T.I.R., or total indicated runout, has never been so critical in any application as it is with this converter. Premature pump failures can be caused by incorrect alignment of the torque converter. Starter noise and ring gear failure may also occur due to poor alignment.
Many repair shops inadvertently use a Dexron-type fluid in this Volkswagen transmission with fairly large success; however, if your shop is located in the northern section of the country Dexron fluid is not recommended. Instead it is recommended to use a full synthetic fluid that maintains its viscosity in cooler temperatures and climates. Dexron seems to work better in warmer climates and consistent temperatures. The extra drag on the pump produces resistance due to the heavier oil and can shear the pump drives on start-up.
Another area to be concerned with is the type of clutch material use on this converter. Many rebuilders prefer Kevlar for a smoother, durable clutch liner. This is no surprise since the original liner does contain a fibrous material suspiciously similar to Kevlar.
In addition, no thinning of the clutch piston is allowed during the rebonding process. The old liner should be chemically removed or media blasted for bonding preparation. Also, the radial lip seal is always worn and must be replaced at each rebuild. Do not reuse the old seal. Part number VWO2V may be found in the Sonnax catalog as its OEM replacement. Careful disassembly of the stator and 18-element sprag is necessary. It is known for being a hiding place for worn clutch material and metal debris. The bimetal three-tang thrust washer is replaced at the same time. This is the perfect time to prevent comebacks and/or failures due to thrust washer failure.
On a final note, it is important to provide a good ground to the impeller before tack welding this converter together. By doing so, arcing is prevented which may cause roller bearing damage. Two minutes extra time spent here will prevent the converter from failing.