automatic transmission runout.

[hangn0ut]

Opinions on checking for runout when using an auto. Did you find that a lot of the time dialing them in was needed. Or was it a lot of work just to find out that its fine. Thanks

 

[bOb shingler]

I never check any.

 

[fishy68]

I have never had a problem in the past 33 yrs of doing transmission's (until recently) but to be perfectly honest I never checked them either. What I generally go by is when I disassemble it if I see the converter snout and/or the front pump bushing has a lot of wear it's an indicator that there could be an alignment problem. Just recently I pulled my engine out that only has about 5500 miles on it and noticed a bunch of metallic bronze dust in the bottom of the bellhousing and the converter snout was worn pretty bad so I checked the alignment and found it was off .016"... Incidentally I measured it with 2 transmission cases, a 727 and a 904, and both checked the exact same .016" off

 

[FredS]

fishy, were the dowels beat up. I've yet to come across one out of alignment in over 15yrs of doing these.

 

[fishy68]

fishy, were the dowels beat up. I've yet to come across one out of alignment in over 15yrs of doing these.

One looks perfect, the other has some light pitting but I don't believe it's anything that could cause the issue. I also noticed that the engine required a .010" shorter timing chain (even that is a little loose) so I think sometime in it's 42 yrs on this earth someone line bored the block

 

[oldkimmer]

..................I've checked the 1s for higher HP but honestly none have been out any amount to speak of.................kim.........

 

[RustyRatRod]

runout. what's that? lol