Front unit end play help needed

[PaulRV6]

I cannot seem to get this clearance. On disassembly I had .036, and after putting in the rebuild parts I cannot get any clearance.I take up the clearance on the output shaft and the front unit is zero. I tried all different selective washer thicknesses and nothing works. The center support cannot go any place but where the bolts snap ring locate it has to be something in the forward clutch or drum. The clearance in the lower section is just where it should be. Where could my problem be? I am pulling my hair out trying to figure this out!! Thanks

paul

 

[atomic 6]

deja vu

I pulled my center support like thirty times,before I ended up measuring everything three or four times. Then realizing that some things were not machined correctly.

What did you have done to this trans. Are they all the same hard parts that was original to the trans?

 

[Lee Thompson]

?

Are you using either a billet forward drum or billet input shaft? If so measure them and compare to your stock pieces. The pilot end of the input shaft (the end that goes in the forward drum) may have to be shortened. I had to do this on mine. Just use a die grinder with a cutoff wheel.

 

[PaulRV6]

Using all the same hard parts. Just new clutches/steels and pressure plates. I know that the first time going together when I checked end play (with orig selective washer) that it was a little under tol. so that is what lead me to order diff. thickness washers. Now after trying the different washers I cannot seem to get any end play (even using orig washer).

I am wondering if it could be I just cannot pull up hard enough to measure it? But then I think is it just the weight of the forward drum/clutch or do I have to overcome the fit of the seals/bushings in the center support.

I

 

[PaulRV6]

Sorry for not finishing my last post. Just to update whoever is following this but I checked the front unit end play without any selective washer. The end play measured at .075" (with the output shaft clearance taken up). The thinnest washer I can get is .075-.080 which is not going to work.
No wonder with the #8 I could not measure any end play.

What are my options? Am I doing something wrong here? What should I look for?

The only hard part change is a low/ reverse clutch from PTS machined for a torrington rather than a plastic thrust washer.

paul

 

[PaulRV6]

Did some measuring today and to the best of my knowledge it has to be something in the lower section. Since the same drum is used and the same forward clutch, I checked the thickness of the plastic washer btw direct clutch and forward clutch and it is the same thickness. So there is nothing in the front unit that can cause this zero end play (before rebuild) correct?
It has to be the position of the output shaft assembly?

Any suggestions would be much appreciated. Thanks

paul

 

[Nordbert]

I had a problem similar to yours when I put my 200-4r together.
The thrust washer kit had an .080" black plastic thrust washer
for a location that originally had a .060" thrust washer. I also
have the PTS rollered low/rev housing, and the thinner thrust washer worked with it. BTW, I couldn't find the .080" washer to dimension it so you could find its position.

 

[chris718]

paul,remember me telling you our kits had all the end play washers 1 thru 15 ?

 

[PaulRV6]

Chris, I don't remember that but I'm sure you told me. The problem is not having the proper selective washer cause even if I had the thinnest one it still would not give me enough end play.

Norbert, it seems that putting a thicker washer in there would make my problem worse. You are talking about the washer btw the direct clutch and forward clutch?

Could the lower end have something misplaced even if I have the proper end play there?

paul

 

[chris718]

start by rteducing output shaft end play first.then youll have more where you need it but it is more than evident there is a machining error or misassembly.have fun.

 

[PaulRV6]

PROBLEM SOLVED

Two things I had going against me which was causing the problem. I needed a better method of pullung up on the forward shaft and also the forward clutch/direct drum must not have been down all the way. After measuring and taking it apart enough times than I care to tell, I realized something was not assembled all the way down. Then I needed a good way to pull up on the shaft, which I used two narrow metal strips with 90 deg ends, put a bolt thru those and used nuts to hold it apart at the correct dia. I then was able to pull up on the bolt and still had room for my dial indicator.
After all this I ended up with .026" end play which should do just fine.
So thanks to anyone who gave me their ideas on what could have been wrong. If anyone wants to ask me any questions about the problems I was having with this you can email me. I seem to have gained enough info on doing this.

Thanks, paul