Mrpatel
512Dart
What are your thoughts on checking runout and what would be considered acceptable?
What is your concern here. I would think if you are locating the converter the same way as a manufacturer does it should be very close runout, say within a couple thou. Not sure that a three jaw chuck is that accurate, and I cannot tell from your pic if you have the snout end in a centre or not.
Not sure , but back in the day, I had a drivetrain out of a 68 hemi roadrunner. The convertor was no problem till I started using b-m j convertors, we had 2 of them w/ excessive run out, they would knock the seal and front pump bushing. B-M did repace them tho.
Don`t take much.
One reason I usually try to buy an engine w/ trans still attached , to rebuild, never had a problem except w/ the b-m convertors!I have a new x block being mated to a newer 904 torque flite.
Because this trans has never been mated to this block, I indicated the pump bore of the trans off of the crank flange with stock dowels
In the block. The runout was .015 thou. Yes 15 thousands.
How many people check this. I used offset dowels from Mopar and got it down to .001. I have seen many people chase leaky seals,worn pump bushings, vibrations and even broken converter snouts, and when you ask them they have never checked trans alignment.
This trans and motor misalignment was the worst I have seen.
Problem is you have to have a gutted empty trans case t bolt on and check.
Agreed, but if you do not know the history, you gotta check.One reason I usually try to buy an engine w/ trans still attached , to rebuild, never had a problem except w/ the b-m convertors!
This is NOT the way a manufacturer either welds a converter together or checks for hub runout. See my additional post.What is your concern here. I would think if you are locating the converter the same way as a manufacturer does it should be very close runout, say within a couple thou. Not sure that a three jaw chuck is that accurate, and I cannot tell from your pic if you have the snout end in a centre or not.
I agree with what you are saying, but you should be able to duplicateIn any converter shop I've been in, converters being welded together and having the runout check are always mounted on a thick steel backing plate. This guaranteed they were square in the lathe. They are bolted to this plate via the mounting nuts or studs on the converter.
Run out is very limited.
You live in Ontario, I'd phone Pat at SMR transmissions, he's in Bradford, and the number there is 888-846-6603, and see what he allows for maximum runout on the converters they build. The shop I worked at is closed now, so I can't call them to give you their specs
Next plan, pads are painted, so I will probably take a skim off on the lathe. I will remove the paint first. Not sure how much the flexplate is intended to absorbSince you have it setup on a rotary table, why not requalify the mounting pads with a light cut on the mill.