A4LD Thrust Washer Question

[Boilerfan93]

I just rebuilt a 1993 A4LD and had all forward gears and no reverse. Ran great in forward for 120 miles and started to get a major delay in forward until I finally had no forward gears. I dropped the pan and fluid was burnt. Pulled the tranny and found the foward clutch burnt up. I took it to a local tranny shop that I had been working with during the rebuild. They said I was missing the #4 thrust washer. My center support has a thrust bearing on the snub that mates with the intermediate drum. When I did the teardown, there was no thrust washer on the rear of the center support--only the bearing. Here is my question---do I use both the bearing on the snub and the washer the base of the center support?

If not, any ideas on what caused the forward clutch to burn up?

 

[PopRichie77]

Go to the stickies and download the A4LD Updated Handbook. it explains which center supports have only a thrust washer and which ones have both a washer and a bearing. A 93 with the new center support should have both but the newer one has a recess for the washer.
Low line pressure could cause clutch failure.
A worn valve body could cause failure also.

 

[cklinejr]

I am also missing the #4 Thrust Washer on my 94 4.0 A4LD.

I tired to find the updated A4LD handbook stickey, also did a search and didn't find it.

Does anyone have that info on why it might be missing?

Thanks,
-Charles

 

[PopRichie77]

It is missing because posting copy write material is not permitted.

 

[cklinejr]

My #4 Trust Washer is missing because its Copy write material? ;-P ;-P

 

[PopRichie77]

Sorry, thought you meant the handbook.

 

[cklinejr]

I did, but my end goal is to find out why my #4 thrust was also missing. I don't think it was ever taken apart, maybe it was left out from the factory?

 

[PopRichie77]

That is a selective thrust washer, selected for proper clearance. It either got chewed up or the last guy left it out.

 

[cklinejr]

Its definitely not chewed up, its clean inside (besides the friction disc sludge)

 

[JK080]

Not sure which one #4 is but if its the one between the forward and direct drum, it might not have one. If the center support has a bearing on the end of the sealing ring hub then there is no thrust washer between the drums. 93 and later have this bearing and no washer.

 

[PopRichie77]

JK080, Is probably right about the washer being a bearing instead. Yes, it's hard to know which one he is referring to as number 4.

The number 4 thrust washer was eliminated.