[Rough]

When I assembled the input drum on my 700R4 trans I found that I need a thinner selective plate for the forward clutch pack as the clearance is only about .005, I ordered the thinner plate and in the meantime I decided to mock up the drum & pump to see how everything fit together in the case. After I installed the pump into the case I found that I don't have any end play on the output shaft although I used the thinnest selective washer under the bearing. Now for the question, does the forward clutch pack clearance or lack of, have an effect on the end play of the input drum?

Thank you,

Max

[Crosley]

Now for the question, does the forward clutch pack clearance or lack of, have an effect on the end play of the input drum?

=========== nope


On the forward clutch pack clearance , there are thick and thin steels availible to open clearance up.

Are you building an early drum or late design?

Originally Posted by Rough

When I assembled the input drum on my 700R4 trans I found that I need a thinner selective plate for the forward clutch pack as the clearance is only about .005, I ordered the thinner plate and in the meantime I decided to mock up the drum & pump to see how everything fit together in the case. After I installed the pump into the case I found that I don't have any end play on the output shaft although I used the thinnest selective washer under the bearing. Now for the question, does the forward clutch pack clearance or lack of, have an effect on the end play of the input drum?

Thank you,

Max

[Rough]

Late design, any suggestions as to what I might have done to lose the end play? It had about .015 before I took it apart.

[Crosley]

installed something wrong?

different / new thrust washers?

Change any hard parts? Reverse input drum, torrington bearings, fresh bushings?

sealing rings giving a false "no clearance" indication?

Originally Posted by Rough

Late design, any suggestions as to what I might have done to lose the end play? It had about .015 before I took it apart.

[Rough]

I should have checked the forward clearance before I disassembled, live and learn, I did measure the old & new steels & frictions and they were both about the same thickness could it have been set up that tight [.005]?
New bushings,new GM reverse drum, new washers & bearings, also both planets, sunshell & changed to bearing design reaction carrier shaft.
I'm going to recheck now that you suggested false no clearance.... might be with all the new parts.

[Crosley]

If you changed all those hard parts ( new or used) .... all bets are off for the original selective to be correct.

Did you buy new FWD steels? stack the used FWD steels together, hold them up to a light and look at them on the edge....... any wavey ( non flat ) steels there?

FWD Steels are .010 to .012 different from early to late design. Frictions too....... mix them up and there is little or tooo much clearance.


Sometimes kits supply incorrect parts.... hard to beleive but true.

Originally Posted by Rough

I should have checked the forward clearance before I disassembled, live and learn, I did measure the old & new steels & frictions and they were both about the same thickness could it have been set up that tight [.005]?
New bushings,new GM reverse drum, new washers & bearings, also both planets, sunshell & changed to bearing design reaction carrier shaft.
I'm going to recheck now that you suggested false no clearance.... might be with all the new parts.

[Rough]

I did use new steels .090 [with the original wave plate] and they are the same thickness as the old ones, I put it together today minus the band and I have about .014 -.015 end play.
I'm just going to run the selective over a piece of emery cloth to pick up another 1 or 2 thousandths and go with it. I still don't understand how the forward clearance is so tight when everything I replaced is close to the same thickness, I should have measured the old stack clearance before I removed it.

[Crosley]

frictions measure the same?

early late designs.

early and late design on the pressure plate for the over run frictions too.

Originally Posted by Rough

I did use new steels .090 [with the original wave plate] and they are the same thickness as the old ones, I put it together today minus the band and I have about .014 -.015 end play.
I'm just going to run the selective over a piece of emery cloth to pick up another 1 or 2 thousandths and go with it. I still don't understand how the forward clearance is so tight when everything I replaced is close to the same thickness, I should have measured the old stack clearance before I removed it.

[Rough]

The new forward frictions were each about .005 thicker which I figure was due to the wear on the old ones, I reused the pressure plate on the overruns.
I'll also double check the difference between the old & new overrun frictions & steels.

[Rough]

After I installed the trans today I ran it through the gears a few times while it was still in the air then I took a drive and it seems to be working well. Quick shifts that get progressively firmer with more throttle. I need some advice as to the proper break-in procedure. I'd like to go to the races next weekend but not at the expense of my fresh rebuild. Also, I have a line lock that I use when I heat my drag radials, and I'd like to know if I should continue to use 1st gear to do this.

Thanks for your help.

Max