Hello from France! I'm the owner of a 1985 Camaro Z28 equipped with a 700R4 transmission, and I'm currently having it rebuilt. The issue concerns the thickness of the clutch discs. I ordered the master rebuild kit from Pioneer, part number PIO 753017, and the thickness of the steel discs is different from the original ones.

Does this difference in thickness affect the operation or reliability of the transmission? I’d like to be sure before moving forward with the rebuild. Thank you in advance!

 

It shouldn't matter too much. Your builder should be able to make it work no problem

 

Thank you for your help, I'm also taking the opportunity to ask if the "filling" of the drum input matters, because it's also different with the reconstruction kit—I just want to make sure I'm not doing anything wrong haha.

 

What's the plan for this transmission?? You gonna throw some power at it or is it more of a cruiser/daily driver??

 

This is for everyday use, I don't plan on modifying it or adding more power to it. In fact, the main issue is that the various diagrams of the clutch packs show wavy plates, and there were neither any in place in my car nor in the rebuild kit. These wavy plates have been replaced with flat ones, or do I absolutely need to order them separately?

 

You'll be fine without the wavy plates. Things get changed and updated all the time

 

Total clearance of the stack of clutches in each pack should be checked before final assembly. The wave plates soften the application of the clutch pack, sometimes removed for performance for firmer shifts, sometimes removed out of ignorance thinking removal is better.

 

Thank you for the information,So, what are the tolerance ranges for each input drum?

 

If this is a original 1985 unit. Then the reverse input drum will have steel apply piston. There will be a waved steel at the bottom of the clutch pack making contact with a clutch. The other three steels in this clutch pack will be flat. If the piston is aluminum in the reverse input drum. Then the transmission has been rebuilt and the later 1987 and up reverse input drum installed. The steel at the bottom will be a Belville type, (conical, not flat). In the input drum there will be a waved steel sitting on top of the overrun pressure plate, with a forward clutch making contact with it. The later 1987 and up units used the same waved steel with a flat steel on top of it making contact with the first forward clutch. The 1985 input drum used a .128" 3-4 snap ring at the top of this drum. 1987 and later input drums used a .093" 3-4 snap ring, and the .128" snap will not go in this drum.
Clearances:
Reverse input .040" - .070"
Low reverse .030" - .060"
Forward .015" - .050"
3-4 .035" - .055"
Use a Corvette servo here to improve the 2-3 shift and keeping the 3-4 clutches living longer.
For stock application keep the 2nd gear feed hole on the separator plate at .070" and no more than .076". This is using the Corvette servo.
The band release hole at .093". Drill if this hole is missing.
3rd gear feed hole .093". with a stock diameter torque converter.
4th gear feed hole .125"
Minimum .422" main boost valve. A .471" main boost valve would be better.
If you are going to manually shift this at all, or you use reverse a lot. You want a .282" intermediate reverse boost valve at a minimum. This boost valve offers more holding power in manual low, manual second and reverse.
Soak all clutches, the same with the band, a minimum of ten minutes. You can let them hang dry somewhat before installation. Soaking the clutches here does not change clearances.
This should help some with what you are doing.